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Battery Design - American Radio History

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1. ompietely describes ever known means of credit car fraud and scams counter measures Protect yourself OTHER EXCITING TITLES ectromagnetic weapon attacks cause cancer birth defects and profound psy chological and neurological dis VMBs Pius countermeasures protect orders This manual includes actual yourself from hackers thieves 19 cases of EM attacks we investigated Includes how to tell if you are under an PHREAKING i EM attack and specific countermea CALLER ID g ANI j Sures Much more Shocking 19 Details on hon ther 7 4 BY AN ORDER OF work and dozens of ef THE MAGNITUDE fective ways of defeat ing Caller ID ANI 69 The most comprehen 5 Call Blocking 67 etc Also sive hard hitting hi describes Caller ID Orange Beige survival book ever Cheese amp CF Boxes ESS 57 E 911 vari ous Class services CN A Non Pub DA CAMA DNR 800 ECR Diverters LD Extenders Centrex much more 19 CELLULAR AND co T ed and countermeasures Includes G3 Fax protocols commo param eters compression algorithms Class 1 Class 2 commands Spy Fax Switcher Fax Serv ers FODs FOCs and Makeup Terminating Codes And insights into designing Fax inter ception devices and modifying existing Faxes i
2. aca 32 C amp S Sales Ine 102 NRI Schools orwell CD Electronics 20000000 85 Orion Electronics 98 Circuit Specialists 00 94 ONN aA 114 CLAGGK Inc 62 146 Parts Express 200000000 occcecccccceccee 91 Cleveland Institute of Electronics 55 45 Prairie Digital Inc 0000000 92 Command Productions 90 46 ERINE saiyaan 88 Comtrad Industries CV3 7 47 ee 98 Consumertronics 0 00 0 0 00 0 86 RC Distributing o oo 112 170 Cook s Institute of Elec Eng I School of Electronics 88 48 Dalbani ccc eeeeeeeee 101 Silicon Valley Surplus 112 162 Davis Instruments l1 Skyvision ceccccececcceceeesn 89 173 Digi Key OoOrp 5 Smithy Company 0000 114 EDE Spy Outlet 98 Street Smart Security 104 148 Electronic Rainbow 97 Tab Books hoi 37 Electronic Technology Today 10 80 T C Tronics n 104 Foley Belsaw 2 a 107 149 Telulex coccccccccceeeeeeeeccee 113 Forest Electronics 85 136 UCANDO Videos 0000000000000 11 Fotronic Corporation 96 US Cyberlab TO ee E 85 General Device Instruments 100 Vision Electronics 2 00 96 Grantham College of Engineering 4 Visual Communications 98
3. Print log to disk or export data Accepts standard scope probes Uses standard printer port Small and portable Works with laptops Same day shipping Made in U S A Order yours today 800 980 9806 MC Visa Amex Allison Technology Corporation 8343 Carvel Houston TX 77036 USA PH 713 777 0401 FAX 713 777 4746 BBS 713 777 4746 http www atcweb com _ CIRCLE 137 ON FREE INFORMATION CARD CIRCLE 149 ON FREE INFORMATION CARD Single channel units from 169 Dual channel units from 349 Automotive probes Battery packs P O you can ensure that your SG 100 will never become C O D 415 938 0240 email sales telulex com ection and Power Level Measurement And because BEZZE and a wide diversity of modulation functions all of which can applied signal You also get signal analysis functions that are d n LS Mountain View Ca 94043 Arbitrary Waveform Generation Now Available http www telulex com Call email or fax us for your free information kit Visit us on the web for specs and applications S91U04 9913 seindod Z664 ANF just not offered on any other signal source such as DTMF Det you can download new instrument functions to Flash memory be performed using an internally generated or externally obsolete The SG 100 gives you clean 1 Hz synthesized precision Telulex Inc 2455 Middlefield Way S Fax 415 938 0241 795
4. r nm a P1 ee m a r a y j F ae ee ER oe Fe H Ln ay z 1 _ 4 xE en en e ts Ship Popular Electronics July 1997 102 CALL TOLL FREE BRR CALL OF WRITE FOF 800 292 7711 orders only C amp S SALES pe ae Se Habla Espanol EXCELLENCE IN SERVICE a 800 445 3201 XK 550 Digital Analog Trainer TK 3000 E g Elenco s advanced designed Digital Analog Trainer is specially 95 89 designed for school projects It is built on a single PC board for maxi mum reliability It includes 5 built in power supplies a function gener ator with continuously sine triangular and square wave forms 1560 tle point breadboard area Tools Included SR 2 Deluxe Soldering iron SH 1 Soldering Iron Stand ST 1 Diagonal Pliers ST 2 Long Nose Pliers ST 30 Deluxe Wire Stripper SE 1 Solder Ease Kit e ND 3 3 pc Nut Driver Set TL 8 Precision Screw Drivers e ST 5 Screw Driver Slotted 3 16 ST 6 Screw Driver 1 Phillips ET 10 IC Puller o f _ SP 2 Solder Pump A professional technician service tool kit in a ST 20 Safety Goggles metal reinforced tool case with heavy duty roe Driver handle and locks A removable pallet han SW 3 Solder Wick dies most of the tools listed with more room for tools and parts in the lower half Model XP 581 4 Fully Regulated DC Power Supplies In One Unit 4 DC voltages 3 fixed 5V 3A 12V 1A 12V 1A 1
5. July 1997 g Automatically lets you sort out 16 cable leads single hanea it can measure down to one billionth of a meter Keep tabs on the rhythn js fluctuations of your heanig Electronics kegpsithe oid heap perkingiio AGEE standardsi Better ta e Kj madad Il 224648784 6 a er ee oe EO bi a h Arps i P T me gt ol _ NEW Electronics Workbench Version 5 with analog digital and mixed A D SPICE simulation a full suite of analyses and over 4 000 devices Still the standard for power and ease of use Now ten times faster Still the same low price Join over 75 000 customers and find out why more engineers and hobbyists buy Electronics Workbench than any other SPICE simulator You ll be working productively in 20 minutes and creating better designs faster We guarantee it For a free demo check out our web site at hebpi www interaction 30 DAY MONEY BACK GUARANTEE VERSION 5 0 FOR WINDOWS 95 NT 3 1 Upgrades from previous versions 79 CALL 800 263 5552 S High End Features TRUE MIXED ANALOG DIGITAL YES FULLY INTERACTIVE SIMULATION YES ANALOG ENGINE SPICE 3F5 32 BIT DIGITAL ENGINE NATIVE 32 BIT TEMPERATURE CONTROL EACH DEVICE PRO SCHEMATIC EDITOR YES HIERARCHICAL CIRCUITS YES VIRTUAL INSTRUMENTS YES ON SCREEN GRAPHS __YES ANALOG COMPONENTS OVER 100 DIGITAL COMPONENTS OVER 200 DEVICE MODELS OVER 4 000 MONEY BACK GUARANTE
6. point to point uncertainty w imun feature size 19 000 x 100 060 x Fig 1 The new M electronic ruler which is expected to measure to within one billionth of a meter works by combining the atomic imaging capability of an STM with the tech nology for moving and positioning STM probes over much larger areas with unprece dented precision thus giving it the ability to survey the landscape between atoms on a chrome line designed to be 750 nanometers wide It made 16 over lapping images each one 3 micrometers by 5 micrometers The results of M s line width mea surements in that test corresponded closely with those obtained with an electrical method Although only suggestive because of the small sampling size the results were con sistent with other comparisons that found electrical and microscope based methods to yield systemati cally differing results The explana tion of these differences is significant as the semiconductor industry demands greater measurement accuracy and reliability The indus try must understand the capabilities and limitations of existing measure ment methods being considered for future generations of integrated cir cuits The results of the study were pre sented in Japan last year at the International Conference on Microelectronic Test Structures Aside from its immediate industrial applications M has physicists excit ed about investigating scientific questions
7. Call C amp D ELECTRONICS 1 888 615 5757 M F 10a 6p THIGH QUALITY TEST EQUIPMENT BEST PRICE ALFA ELECTRONICS Fluke Multimeter DMM 89 179 00 DMM A91 DMM 20 ple uke A Most Advanced DMM 49 95 m alan 95 Holster C 10 10 80 7 to 81 4 dBm with 4Q 12000 NOW 39 00 Capacitance 2nF 200uF Fluke 70 Il 75 95 20 reference impedances a Resistance 200 200MQ Fiuke 73 ii 97 50 True RMS Plus Free Case 5S tig 06 accuracy Fluke 75 II 129 Frequency counter 100 Hz 10MHz i 3 Capacitance Saf Som Solar Cell Powered SOE et ee Fluke 77 I 195 Measure AC volt to 20kHz Large Di splay Continuity Duty 5000 counts 0 1 basic accuracy Peak hold Max Fluke 79 ii 175 Auto manual range fast bar graph Diode Continuity Ruggerdized case Fluke 29 li 175 E Min Max Ave DH Relatrve Zoom Volt Amp Ohm Rubber holster 8 00 Fluke 76 175 wey Auto power off res Hold nase Fluke 87 287 eee mes input waming oe Full line of OMMs Fluke 867 1199 7 functions 19 ranges Data hold relative mode Telescoping antenna 8 00 Deluxe case 5 00 Also Available AC DC clamp meter Light meter Thermometer pH meter High voltage Probe Digital Caliper Anemometer Electronic scale Force Gauge Tachometer Stroboscope Humidity amp EMF adapter Sound level meter Frequency counter SWR field strength power meter Dip meter Resistance 10N 10MN Auto manual range Dissipation factor amp Q factor Serial amp parallel mo
8. e Light Shows BTC4 Plans 500KV unit meia D j Mindon User Tesla Coil ej Weapon e e j ie Me A 2S e 12 115V Gravity _ eee e eww W T Eee e Science Project peram a ose alge in our lab Join the research Levitate an object TI Powers light and 4 Great science fair projec LASIKM 1 mw low cost Kit 69 50 i objects without contact E ALGUEK 2 3mw Kit HNE70 5 7mw ready to use e Ballistic Velocities Handheld Battery Operated Labelled as DANGEROUS Product Experiment now before it is classified as a firearm EGUNT Plans ss 20 A GRAT PANS oanien 15 00 Experiment with electrical and mec chanical fields TOUS PIGS cessc mapsa 8 00 TCLSK Kit Plans 12VDC scesesocesme GRA1K Power Supply Kit Plans 99 50 GRA10 Assbld Kit Plans 149 50 Includes text book on ani Gravi theory lon Ray Gun T Project Energy IL Star Wars technolog emonstrafes gt 2 Electronic tata sa aA stat Atal ttn A Oe weapons potential IOG7K kivPlans 99 50 fy EN gt K Caution m 1 ce e Talking N Hynotizer 4 Required We can design and build l 4000 Volts ioma High Voltage Plasma Globe i F Control their minds Programmable high voltage systems Spectacular color Pulsates to music sounds 8 9 with intensity and sound controls PLASMA1 Ready to Use 79 50 audible and
9. LOWEST PRICES EVER New Fruxe Muctimerters amp Tektronix Oscittoscopes The Industry Standard in Multimeters Tektronix TDS Series Fluke Model 87 285 00 ON Sate ee E E aaa TOE Equipment Depot Burst Operation www fotronic com A FOTRONIC CORPORATION COMPANY e External 30 MHz Frequency Counter 1 800 996 3837 P O BOX 708 Medford MA 02155 617 665 1400 FAX 617 665 0780 m SS Ame CD TOLL FREE 1 800 99 METER email afoti fotronic com 3 2 DIGIT LCD THERMOMETER Many of our kits pa are available i completely built PRACTICAL APPLICATIONS e Indoor Outdocr temperature Temperature of electronic equipment vs room temperature Furnace or Air Conditioner efficiency return air vs output air Temperature inside car outside car e Attic temperature outside temperature SIZE 2 3 4 W x 1 5 8 H x 1 D LCD T1 KIT 34 95 LCD T1C CABINET 9 95 7 STROBE LIGHT Do you need an attention getter waming light or flashing light for model airplanes Then this kit is for you Use it as an emergency z light for your auto radio tower oia even use it on your bicycle Has a variable flash rete Power requirement 6 or 12v DC Size 3 5 x1 9 ST 1 kit 11 95 SUPER SNOOPER BIG EAR Listen through walls hear conversations across the groom Add a parabolic a reflector and hear blocks away The BIG EAR can be hidden
10. Greenleaf Electronics Inc 90 Weeder Technologies 115 Home Automation Systems 11 Weka Publishing 108 Information Unlimited 31 WPT Publications 117 13 Interactive Image Technologies CV2 134 Xandi Electronics 0 000 000 0000 93 Intronics Inc 0 0 00 100 KUDO i aeee e n 110 ADVERTISING SALES OFFICES Gernsback Publications inc 500 Bi County Bivd Farmingdale NY 11735 3931 1 516 293 3000 Fax 1 516 293 3115 Larry Steckler EHF CET President ext 201 e mail advertising gernsback Christina Estrada Assistant to the President ext 209 For Advertising ONLY 1 516 293 3000 Fax 1 516 293 3115 Larry Steckler publisher Arline Fishman advertising director ext 206 Michele Torriilo advertising assistant ext 211 Adria Coren credit manager ext 208 Subscription Customer Service Order Entry 1 800 827 0383 7 30 AM 8 30 PM EST ADVERTISING SALES OFFICES EAST SOUTHEAST Stanley Levitan Eastern Sales 1 Overlook Ave Great Neck NY 11021 3750 1 516 487 9357 1 516 293 3000 Fax 1 516 487 8402 slevitan26 aol com MIDWEST Texas Arkansas Oklahoma Colorado Arizona Ralph Bergen Midwest Sales One Northfield Plaza Suite 300 Northfield iL 60093 1214 1 847 559 0555 Fax 1 847 559 0562 bergenrj aol com PACIFIC COAST Mountain States Anita Bartman Hutch Looney amp Assoc Inc 6310 San Vicent
11. Popular Electronics July 1997 b k Ja Dap t bel anif Call Dept 362 J 800 426 1194 CIRCLE 150 ON FREE INFORMATION CARD A WHOLE NEW WORLD IN SCIENCE KITS ee _ ROBOTIC ARM TRAINER Ps No Soldering r x Ms Thy p J z iy r TRIPLE ACTION SOLAR CAR No Soldering MOON WALKER HYPER PEPPY LINE TRACKER OW Next Generation Eat OWIKIT also incorporates the go ley fofi dabl a5 ani al basic principles of robotic experiments 3 ee E ee sensing and locomotion guaranteeing o amp Kits challenge the enthusiast to op maig hands cn advanture of ow solder circuit boards and or rah ried d fun hanicali le a But remember OWI is the recognized EK ree founder and leader in Educational Robot ELEKIT http www owirobot com Kits ACCEPT NO IMITATIONS i 1160 Mahalo Place Svite B ROBOTIC ARM TRAINER OWI 007 5 Axis Control NEW 69 95 Rancho Dominguez CA 90220 5443 TRIPLE ACTION SOLAR CAR OWI685 Solar Sensor NEW 39 95 310 638 7970 936K d 47 Pg Book 95 I SCARGO OWI 936K Sound Sensor l g Book 36 Fax 310 638 8347 WAO II OWI 961K Programmable Graphic 59 Pg Book 69 95 SPIDER OWI 962K Infrared Sensor 49 Pg Book 49 95 TR E ENEA ast Eee FNS Order M F 8a m 4p m PST LINE TRACKER OWI 963K Infrared Sensor HYPER PEPPY MOON WALKER 48 Pg Book 49 95 46 Pg Book 24 95 10 Pg Book 34 95 OWI 969K Sound Touch Sen
12. includes FREE Stun Gun 249 50 STUN GUNS sold saak STUN100 100 000 Volts 34 50 STUNZ00 200 000 Volts 0 MIND CONTROL GA Places subjects under your AS aD control Programmable audib amp visual stimuli with biofeedback Induces strange amp bizarre halucinations without drugs Caution not FDA SAROS a Quality Laser Pointer LAPN64 15mw equy 2000 39 50 LAPN61 o0mw as 4000 84 50 naamaa dn a aan a AA n A E A AT aaaananaasa n Dara gt Window Bounce Laser Listener 1 Aim at window and listen to sounds from reflected light CAUTION Not for haa use LWB3 Plains emri 0 00 LWB3K Kit Plans oe vidt ipag r 5148 50 41000 Potato Cannon MIND2 Plans 15 00 Not a Toy Uses electronic or piezo 2 MIND2K Kit and PIANS oonan 49 50 ignition CAUTION REQUIRED MIND20 Assembled Unit 69 50 POTI Plans dangerous product 10 00 VISIT US ON THE WEB htto www amazing1 com TION Dept PEM 7 Box 716 Amherst NH 03031 ETNOG INFORMA Phone 603 673 4730 FAX 603 672 5406 FREE with Order or ar 2A UNLIMITED MC VISA COD Checks accepted Please add 185 008 8H L send t ao m 24 Hour Phone 800 221 1705 Orders Only Please S91U01 98 3 seindog 7661 ANF G RETAILERS THAT SELL OUR MAGAZINE MONTHLY Alaska Frigid North Co 1207 W 36th Avenue Anchorage
13. Ada 4 FREE Ship Hand Technologies usacamas CATALOG PO Box 421 Batavia OH 45103 weedtech iglou com 513 752 0279 50 MHz Frequency Counter Reads frequency from 1Hz to SOMHz and displays up to 7 digits on a 18x1 character LCD display Auto range feature provides f floating decimal point and automatic placement of suffix Hz KHz or MHz Microcontroller besed provides for very small parts count only 2 x 3 blg 46 50 Telephone Call Restrictor Connects to telephone wall jack Disables ail phones on the line if attempting to either dial a number that has been stored f in memory Block mode or dial a number that has not been stored In memory Allow mode Use touch tone phone to enter telephone numbers into memory and choose mode Program from any phone on the line using your password 35 00 Caller ID RS 232 Connects between a telephone wall J jack and an RS 232 serial port ecodes the caller ID data sent over the phone line and sends it to your 1 PC Mac in a pre formatted ASCII character string Create your own program to log the name number date and time of all incoming calls 4 Block out unwanted callers to your BBS modem 34 50 Home Automation Connects between a TW523 and an RS 232 serlal port Use your PC Mac to receive and transmit all X 10 commands Create your own program to control your home automation system tuming on off any devic
14. Continulty Beeper Diode i E Temperature w Probe Type K gt ae Capacitance 20uF E TV CONVERTERS AND DESCRAMBLERS _____ WE CARRY A FULL LINE OF CONVERTERS AND DESCRAMBLERS COMPATIBLE WITH MOST MAJOR BRANDS INCLUDING De arenes e Scientific Atlanta Frequency Lh a ae es ce TM i Samna inductance 20H ee e Da eh e Tocom Auto Power Off IB Ss a ay e s e na ee Tw EEEE e Zenith e Pioneer a SE AT A Se EE HG MS Peak Hold ies a PE eee er ae le eee Protective Holster tee ee N OOE E G Suggested Resale Price 49 95 64 95 Lots more High Standard Test Instruments available Allin One Instrument Oscilloscope Power Supply Function Generator Frequency Counter Multimeter Capacitance Engine Analyzer Clamp On Electrical Tester and More e See your local distributors or Call for Catalog Bel MERIT 4 800 532 3221 112 BUR ae TEST INSTRUMENT P O Box 744 Lake Forest CA 92630 _ 30 DAY MONEY BACK GUARANTEE BEST PRICES FREE CATALOG ALLSTAR ELECTRONICS 800 782 7214 HOURS 9 6 M F 10 3 Sat EST It is not the Intent of Altstar Electronics to defraud any pay TV operator Anyone implying theft of service will be denied assistance Ali brand names are registered trademarke of thelr feepective owners amp are used for referenc
15. Z axis input MHz max Channels Max ns div Sweep Sync Tester Find Base Single sweep S 1360 60 imvV div 2 10ns div Yes Yes Yes Yes 2 1225 1345 40 imVidiv 2 40ns div Yes Yes Yes Yes 2 S 1340 40 imV div 2 10ns div No Yes No No 1 20MHz DUAL TRACE 1330 25 mV div 2 10ns div Yes Yes Yes Yes 2 Model 2120 2 Year Warranty 1325 25 mV div 2 10ns div No Yes No No 1 Special 389 95 DIGITAL STORAGE Model 2125 with delayed sweep Model Bandwidth Analog No of Sampling Memory _ Internalt Pretrigger Output 539 95 MHz Sen max Channels Rate Channel Backed Up Ste ImV division sensitivity DS 303 30 1mV div 2 20MS S 2K Yes 0 25 50 75 RS232 7 AUTO NORM triggered sweep operation 1mV div 2 20MS S 2K Yes 0 25 50 75 RS232 E AC TVH TWW anc line coupling a Calibrated 19 slep time base with x10 magnifier Compact low profile design y AT PRICES THIS LOW THEY LL BE GONE i i Affordable Spectrum i HITACHI SCOPES Fluke Analvzers by B amp Inventory Reduction Sale y y Lowest Prices of the Decade 500MHz Serles 1 05GHz Serles V 209 20MHz Battery Operated V 695 60MHz w Cursors Model 2615 1595 Model 2625 2395 Was 1505 NOW 1095 Save 410 Was 1815 NOW 1395 Save 420 Model 2620 w tracking Model 2630 w tracking generator 1895 generator 2995 V 422 4OMHz Was 965 V 1065A 100MHz w Cursors if NOW 765 Save 200 Was 2139 NOW 1565 Save 574 2 i Brie V 5
16. into the circuit to tame the tri odes and reduce the likelihood of oscil the input through a small carefully adjusted capacitor The result was a cancellation of the tube s internal capacitance suppressing the tendency to oscillate Many manufacturers resort ed to other methods as described above to avoid paying royalties for the Hazeltine circuit But the Freed Eisemann firm bought in and was one of the first companies to produce and heavily advertise beginning in 1923 a Neutrodyne set That set was the Model NR 5 a radio always think of as the classic three dialer In fact one reason that haven t done a three dialer restoration in all the years I ve been writing this column is that didn t have a good NR 5 to work with However that is no longer true There is now one waiting in the wings ready to appear on Stage when the restoration begins fit dubbed Marvel The little set sold So well that Freed seeking capital to expand formed a partnership with his brother Arthur s employer Alexander Eisemann Arthur eventually became secretary of the firm But in 1922 the first major wave of broadcast set purchases was coming to an end and sales were ebbing On top of that a company known as The Wireless Specialty Apparatus Co which held key patents in crystal set technology had begun threatening to sue all other companies making or sell ing crystal detectors Freed Eisemann
17. was talking to myself As watched the feeding frenzy at the coffee maker pon dered my situation The fox required a variable timing circuit that would put a short bit of Morse code at the end of each push to talk PTT inter val and also had to transmit a call sign at ten minute intervals It need ed to be battery powered and pretty small the fox hider had to be pretty creative when he stashed the fox The final package needed to be ready in three weeks And my reputation as the club electronics guru depended on how well it worked I was in deep trouble In Search of a Fox When got home that night pulled out a few F ig l The ADAPT 11 starter package comes with an instruction manual refer ence guide programming cable and a disk of firmware of my radio handbooks could handle the timing circuit and the tone generation was no problem but keying the tone on and off to create Morse code characters Yikes There was some serious cir cuitry involved there Not only that but it was digital circuitry and was really an analog kind of guy put the books on the shelf and went to bed in dismay T minus twenty days and count ing awoke the next morning and reviewed the situation was still dismayed but was just as deter mined to find a solution Later on at work pulled out all the electronics journals and magazines knew that this was a job for some sort of microcontroller u
18. As of this writing Surplus Direct 800 753 7877 is selling Version 2 0 for about 25 That s a true bargain It has an OS 2 look and feel but does 90 of what the newer version does for about one third the cost System Commander System Commander has one pur pose in life it enables you to run more than one operating system on one machine In fact you can install and run more than 100 OSs Depending on the OS you can install each to a different partition However all DOS and Win dows through Win95 OSs must reside on the primary partition NT can boot from an extended partition That is be cause the OSs themselves are hard VENDOR INFORMATION The prices shown below ara suggested retail prices Price discounts available through software retailers PowerDesk Utilities 34 95 324 95 for upgrade Mijenix Corporation 6566 Odana Road Suite 122 Madison Wi 53719 B00 645 3649 608 277 1881 WA menixam PartitionMagic 3 0 69 95 329 95 for upgrade PowerQuest Corp FO Box 1941 Gram UT 84059 1911 800 379 2566 801 226 0977 www powerguest bom QuickView Plus 4 0 59 99 29 tor upgrade Inso Corp 350 Norih Wabash 15th floor Chicago IL 60611 800 333 1395 912 329 0700 werw inso com Stiletto 22 Bruce Switzer 204 Duplex Avenue Toronto Ontario Canada MSP 2B2 bewitzar ican net 104722 1260 compuserve com www inforamp net ors208Giindex htm System Commander Y Communic
19. Partition Magic PM changes all that With it you can re partition to your heart s content You should still back up in case anything goes wrong during the process Version 3 0 of PM is less an improvement over the previous ver sion than would have liked The pro gram has a Win95 look and feel but still operates as a DOS mode program The company cleverly makes a transparent installation so that when you click on the icon PM shuts down Windows runs itself then runs Windows again You can save the aggravation simply by running it from the DOS command line The new version includes an anemic boot manager built by IBM and sup plied as part of OS 2 that is certainly functional but much weaker overall than System Commander The new version of PM also includes an appli cation move utility that helps you move applications Windows 3 x and 95 from one drive to another after re par titioning The mover updates all INI files and Registry settings Both 16 and 32 bit versions are included Together the PM bundle provides a lot of power but wish the components were better integrated One good thing is the inclusion of a text only version of PM which can run from a floppy disk Version 3 supports the new FAT32 system that comes with new PCs as part of the Win95 service pack release only Version 3 also Supports more options concerning conversion of par tition among operating system formats FAT NTFS HPFS
20. PhotoDeluxe is re viewed elsewhere in this issue of Gizmo Morph and Kai s Power Goo will be cov ered in detail following our description of the basic acquisition software Installing the Snappy software is as simple a process as you d expect If you re running Windows 95 or NT 4 0 you just pop in the CD ROM and it will run automatically Otherwise with older versions of Windows you Just have to run SETUP EXE from the CD ROM Answer the usual install questions and you ll painlessly install the Snappy software You can do the same for Kai s Power Goo SE and for Gryphon Morph PhotoDeluxe is on its own CD ROM and can be installed equally painlessly When you launch the Snappy software you re greeted by a main screen If the hardware isn t detected you re warned immediately Otherwise you re greeted with a large Snappy logo in a rectangular box with seven buttons down the left side from top to bottom they are SNAP PRE VIEW ADJUST SAVE PRINT SETUP and HELP Their order has little to do with the order in which they re used We d suggest starting with the SETUP button which brings up the setup menu As the user s manual says in its typical flippant fash ion No this menu isn t about betrayal but rather flexibility From the Setup screen you can select the type of snap normal continuous or delayed the video source videotape or live camera the picture quality moving picture
21. Sockets for the two integrated cir cuits are optional Capacitors Cl Fig 2 The subject places a finger over both the LED and the photocell which are placed in close proximity to each other surrounded bv a light proof enclosure The circuit detects changes in blood flow and produces the waveform Shown here It is then processed to give a visual indica tion of the heartbeat or pulse rate of the subject C4 C6 and C11 can be mounted in a horizontal position to keep board height to a minimum Note the location of the four connections to the transducer assembly as well as those for the battery LED2 and power switch LED2 should be temporarily con nected to the circuit for the prelim inary test which must be per formed before the transducer and circuit board are stacked and secured together Attach a 9 volt battery connector to the board where indicated in Fig 5 The con nector can be salvaged from an old 9 volt battery by removing the connector and soldering flexible s31Uu0142943 seindog 7661 ANF Ja o1 Popular Electronics July 1997 J gt fer Fig 3 The transducer assembly details of which are shown here is made up of a piece of unetched circuit board material containing R17 the photocell and LEDI plus three lengths of 46 or 14 inch square plastic wood or metal rod insulated wires to the terminals Use red and black if possible and be sure to connect the positive red wire to the
22. Up to I2 motors up to 3 amps per phase Now with 4 Axis Linear Interpolation Add 6 for shipping Computer with parallel printer port amp cable assembly power supply amp lascr ar required FREE FLYER Voice 510 582 6602 ra S51 0 582 6603 1273 Inctustriat Pky Weat Ald 46t SVS PO Box 5135 Hayward CA 94545 0125 99 PROADCAST FARTHER eee 0o00 The model 220 is a 80 110MHz RF amplifier that connects to mono or Stereo FM transmitters and produces a powerful 2 15 watt signal which could broadcast up to 5 miles or more Requires 50 150 mW drive Step by step plans complete with part source PLUS 2 S amp H information and antenna designs ONLY NO C 0 D Progressive Concepts pox 586 STREAMWOOD IL 60107 _ 430 736 9822 FAXK 6230 736 0353 Bel MERIT DX Series DMMs have best values for performance features and dependability with 3 year warranty Each DX model has standard DMM measurements with a set of additional capabilities diode continuity TRHFE capacitance inductance frequency logic and temperature Additional features include auto power off data hold annunciator and input warning beeper amp peak hold DX451 DX460L only Deluxe holster safety test leads and thermocouple probe DX360T supplied as standard accessories MODEL oxaso_ pxaeot DXaoo oxa AC DC Voitage 750V 1000V eo a AC DC Current 10A 2011 6 Resistance 20M0 200 200m
23. What happens if you set the software for highest quality still when you are really capturing a moving image It s worse than what happens if you try to shoot sports action with a still camera set to a shutter speed of 1 60th of a second With the still camera you ll get a blurred image which can be a good thing if you re trying to convey speed and motion Snappy is different however One of the ways that it s able to capture high res olution 1500 X 1125 higher than NTSC can produce is by examining the video and processing it interpolating to fill in the gaps That processing takes time So while the Snappy will capture eight fields of video it can t capture eight consecu tive fields Motion can really throw off its interpolation routines Moving around when acquiring images for example isn t a good idea your moving shadow can mess up your image A camcorder s auto iris or auto focus can do the same set them to manual control Once you ve taken your snapshot it appears on the screen behind the preview window If you re not happy with the results or even if you are you can call up the Adjust screen Down the right side of the screen are various centered sliders for changing the color saturation bright ness contrast and other picture parame ters For example the PICTURE slide lets you adjust the picture s gamma correc tion or the range from the lightest to darkest areas of the fram
24. Windows CE applications include Pocket Word Pocket Excel Pocket Mail and Pocket Internet Explorer There s also a calculator world clock calendar with scheduling and desktop synchronization and more You even get the solitaire game Pocket Word and Excel are neat lit tle programs both very much like the full blown products in look and feel In Word for example you can define words and paragraphs drag and drop text change fonts point size and so on all with the pen While you proba bly won t want to type anything very long you can send completed files to a desktop system for printing it was pretty neat to surf the web with Pocket Internet Explorer We used a 28 8 modem to connect to an ISP provider and were able to view tiny plain web pages One major problem is very excessive power usage when you have a modem running Our 28 8 rated modem caused a low battery warning to trigger after only about 15 minutes of use on a brand new set of batteries Then the unit shuts off cut ting off our connection You really need an optional AC adapter when you re using a modem Of course you can go through lots of batteries rechargeable or otherwise but you ll still get cut off when they run out Without trying to send even more business Microsofts way Windows CE makes pocket computing more produc tive than ever and Cassiopeia is a neat little gadget that provides you with all the connectivity you need when you re o
25. trolytic capacitor jammed an NPN transistor into the protoboard and tied the collector to the PTT line hooked the mess up to my two meter handheld and fired it up It worked gently squeezed the whole mess together and wrapped it up with thirty seven turns of duct tape After stopping at McDonald s for coffee dropped the whole package into an outside garbage can It was the pre arranged hiding place l knew the manager rolled into the parking lot at the mall at ten minutes to nine Several teams were already taking bearings from the starting point the 1 watt signal was strong enough even four miles away was chatting with Randy when Jim came over Sounds like you got something lashed together after alll he said Oh yeah shrugged Nothing major One of those new Motorola microcontrollers programmed it up in assembly language They re really pretty simple once you ve worked with them a bit Summary This little package can accommodate a multitude of applications In no time you too can be the electronics guru in your neighborhood Maybe the best one on the block For more infor mation on Technological Arts ADAPT 11 series of microcontroller modular starter kits contact the company at the address given in the box middle of the first column or circle no 124 on the Reader service Card D COMPUTER BITS Continued from page 16 then restoring the contents of the drive
26. 29C040 29F010 29F040 amp NY 18 24 amp 28 PIN CXX 2210 2212 2804 2816 2816A 2817 2864 2865 28256 28C010 DS1220 DS1225 DS 1230 SERIAL EEPROMS 8 amp 14 PIN PLUS CXX ER 1400 M58657 2401 02 04 08 16 32 05 2444 59C 1 1 8001 1 A 9306 46 56 66 8572 82 92 68 9XX BIPOLAR PROMS 16 THROUGH 24 PINS 74SXXX AND R2SXXX FAMILY 8741 42 48 49 8751 C51 52 a RICSXXX 87C75X R9C5X 68705 6RHC705 6RHC7I IES PICI6CXX TMS7742 ADAPTER REQUIRED DIAGRAMS INCL UDED ADAPTER REQUIRED DIAGRAMS INCLUDED SOFTWARE READ VERIFY PROGRAM COPY DISK FILE LOAD SAVE CHECKSUM FULL SCREEN BUFFER EDITOR W 20 COMMANDS READS HEX S RECORD AND BINARY FILES FAST DEVICES PROGRAM IN UNDER 20 SEC STING RUGGED 9 X6 X3 ENCLOSURE W HANDLE 5 00 C 0 D MADE IN USA YEAR WARRANTY VISA MAS TERCARD MADE IN USA YEAR WARK AN Y oeme ANDROMEDA RESEARCH P O BOX 222 MILFORD OH 45150 513 831 9708 FAX 513 831 7562 SYSTEM INCLUDES PROGRAMMING UNIT PRINTER PORT CABLE POWER PACK MANUAL AND SOFTWARE 289 ADD 5 00 SHIPPING CABLE TV CONVERTERS Equipment amp Accessories Wholesalers Welcome Call C amp D ELECTRONICS 1 888 615 5757 M F 10a 6p Counter Surveillance field income Call Now Electronic Training Videos ss 2 le Learn electronics quickly and ua BEE easily with UCANDO s computer WE gee animated training videos Students B gt can learn at their own pace and professional
27. 361 5400 Cassiopeia is small measuring 1 inch high by 67 g inches wide by 35s inches deep when folded shut and weighs 13 4 ounces including the bat teries The two AA cells can provide up to 20 hours of use but you generally get less than that if you use it continu ously and much much less when you run a PCMCIA card A lithium bat tery provides backup power when you change the AA batteries The unit s sin gle PCMCIA slot can be used to add memory cards or peripherals If you already own a PCMCIA modem it will work with the Cassiopeia A serial port on the Cassiopeia and the included cable connect it to a desk top or notebook host system This lets you exchange data and synchronize files with your desktop system Cassiopeia also has an IrDA standard infrared port that eliminates the hassle of wires but to use it your desktop sys tem must also have an IR transceiver The keyboard has a_ standard although miniature arrangement While you can t touch type on the tiny key board it s easy enough to find the keys Keyboard use is minimized by having a touch screen and pointing stylus It lets you tap your way through the screen CASIO CASSIOPEIA POCKET PC with Windows CE Takes two to tango Now the pocket PC can dance all night with Microsoft as a partner much as you would with a mouse The 4 grayscale monochrome screen has a resolution of 480 x 240 dots and mea sures about 514 inches diagonally A
28. LED2 Jumbo LED Mouser 351 7542 or similar RESISTORS All fixed resistors are 4 walt SO units unless otherwise noted R I 47i ohm R2 220 000 m A R3 R5 22 000 ohm R R4 R6 RI5S l megohm i R7 RE R10 R14 100 000 ohm R9470 000 ohmn R 1 l megohm cermet potentiometer Digi Key 36C105 or similar R 12 47 000 ohm R I 3 4 7 megohm Ri6 l0t ohm RI Cadmium sulphide light depen dent resister Mouser 338 760 348 CAPACITORS j C1 330 pF 10 WWDC low leakage radial leadl electrolytic C2 3 Ss G7 CS C9 C10_0 1 pF ceramic di isg C4 C6 l uF l0 WVDC radial lead electrolytic C1I 470 uF 6 3 WVDE radial lead clectrolytic ADDITIONAL PARTS AND MATERIALS B1 volt alkaline transistor rea battery SI SPST toggle or slide switch gt Battery clip enclosure hookup wire hardware adhesive tape Note The following parts are available from A Caristi 69 White Pond Road Waldwick NJ 07463 Set of two boards iz 15 50 photocell R17 SATS FRLO5 rewulator ICl 2 00 LM324N quad op amp HZ g 3 25 LMCS55CN CMOS oscilla tor timer C3 a 3 25 Please add 45 00 postage handling vp 4 activated each time IC3 produces a pulse That provides a visual indi cation of the heartbeat or pulse rate of the subject Note that a piezo buzzer may also be used in addition to LED2 to produce an audible indication of the heart rate Transducer Cons
29. Party and others Happily this doesn t pigeon hole the CD into an exclusive classification You can pro gram a disc into more than one group For example a Rock title might also be in your selection for Dance and for Party or a selection for Country might be cross referenced to Ballads As you might suspect all this cross referencing might become a little tire some if discs are widely separated in the changer rack and you had to figu ratively watch paint dry while waiting for the machine to get to one place from another Here s where the rela tively fast access time of the SL MC60 comes into play The jukebox takes 6 1 Continued on page 75 1K 10K FREQUENCY iN HERTZ Fig 1 As this figure shows the frequency response of the SL MC60 is virtually ruler flat over the entire audio range LARRY R ANTONUK was just about over glanced at my watch as Randy the club president made a final announce ment OK then it s settled We ll have our first hidden transmitter hunt or foxhunt next month on the Saturday before the next meeting knew this was coming the group had been kicking the idea back and forth for a few months now Of course none of them had ever actually been in a foxhunt or even really knew what one was but they thought it sounded like it could be fun Just a minute Just a minute It was Jim the club pessimist don t mean to rain on anyone s parad
30. R6 and R7 are used to adjust the output waveforms for best possible symmetry Potentiometer R5 varies the voltage at 4 PARTSLIST 8s FIG 3 Js 3 Te x Ci See text Ai 10 000 ohm potentiometer Re 2200 ohm Hanes 5 resistor A 160 000 ohm 1 watt 5 resistor C1 8038 Intersil ICL8038CCJD PE ae Fed ot ae i ao amp lt lt US OpARTS UST gt pa FIG 4 4 FA Bey CAPACITORS Ci See text ae C2 0 1 uF ceramic dise we OF RESISTORS AAI fixed resistors are y watt 5 units unless otherwise indicated Fa aS Ri R2 4700 ohm A3 10 000 ohm Sa R4a 25 000 ohm potentiometer A5 10 000 ohm potentiometer R R7 100 000 ohm potentiometer z ADDITIONAL PARTS AND MATERIALS jAC1 8038 Intersil ICLB038CCUD Dit Bet done 2 ta pi PA Fa ss n ge S pin 8 to control the oscillator s frequen cy and R4 sets the maximum frequen cy range The oscillator produces the lowest frequency when the voltage at pin 8 is at its maximum and the highest frequency when the voltage is at its minimum Note that pin 7 is disconnect ed from pin 8 in this circuit The following capacitor values for C1 will give you a starting point in set ting up the oscillator for a desired fre quency range 1 0 uF 1 Hz to 100 Hz 0 1 uF 100 Hz to 1 kHz 0 01 uF 1 kHz to 10 kHz and 0 001 uF 10 kHz to 100 kHz These values are only for starters because
31. SnapkKit technalogy Uses phone line for power and i antennal Goes completely unnoticed MA 100 2 5 9 5 w r s Bo A High quality cassette deck plugs 425 SA directly into telephone jack Records up to ST lt 7 12 hours of conversations on a single cassette THR TI BZ 7 Recording starts and stops automatically when 12 Hour phone sused Visa MC 800 594 1047 peepnone O9 OS ree stipring Check MO ucation bine 972 255 7490 Seymor Radix Inc Box 166055 E Irving TX 75016 Now you can visit us on the internet at http Awww why net home sr MORE ENTERTAINMENT OPTIONS ALL THE HOT ACCESSORIES LESS Restores Horizontal and Vertical Sync Lines from Distorted Analogue Video Formats for Free Information Package on Completed Units and Pricing e Call 219 236 5776 e R C Distributing PO Box 552 South Bend IN 46624 k Pi 4c a T9 a 1038 Frontier Dr P8 739 5231 Fergus Falls MN 56537 pine ha mined amp Siyvision LightShow 7 Draw with a laser beam Animation text NEW DX SERIES DMMs music amp more Includes galvos mirrors YEAR a enine DEN WARRANTY sive pen pointer or high power gas laser gt t 4 OH PRES KHZ MHZ f g g j Ney ZA I aa Computerized ee 5 gs amp gt f gt Motors 39 i Includes 2 Stepper motors 2 DC motors computer interface training manual amp demo sofiware disk Expandable
32. Through our Special Program you can pull all of the loose ends of your electronics background together and earn your 8 S E E Degree Upgrade your status and pay to the engineering level Advance rapidiy Many finish in 12 months or less Students and graduates in all 50 states and throughout the worid Established Over 50 Years Write or call for free Descriptive Literature 601 371 1351 OF ELECTRONICS ENGINEERING SJUS emd 2664 AT em E 4251 CYPRESS DRIVE JACKSON MISSISSIPPI 99212 CIRCLE 170 ON FREE INFORMATION CARD Popular Electronics July 1997 a The Tripmate Hyperformance GPS Navi gation System is a portable GPS receiver for a notebook computer It comes with Street Atlas a CD ROM containing maps of every street in the country You get both for only 149 puters for years should remember the time it was very important that a PC compatible system could run Microsoft Flight Simulator if it couldn t it wasn t compatible enough Most ads for PCs even stated that this system runs Microsoft Flight Simulator so it really was important That s because the pro gram was extremely complex for its time but it was nothing compared to Microsoft Flight Simulator for Windows 95 This version features ultra realistic planes with two new planes the Boeing 737 400 and the aerobatic Extra 300S joining the Cessna 182 RG Learjet 35A Schweitzer 2 32 and Sopwith Camel You fly the plane you like best
33. by means of a synchronized flashing light When the circuit is turned on via S1 the battery voltage is regulated to 5 volts by IC a fixed 5 volt 100 mA regu lator That voltage is used to light LED1 which provides the light source that passes through the subject s finger to drive the photocell R17 The photocell is biased with a small current through R2 In total darkness the resistance of the photocell is about 500 000 ohms But as light intensity striking the photo sensitive area of the photo cell increases the photo cell s resistance decreases That s an important point as we will soon see The voltage drop across R17 is AC cou pled to the non inverting input of IC2 a l of an LM324N quad op amp which is configured as an AC schematic diagram of the amplifier and has a gain of 46 at Heartbeat Machine The circuit is comprised of three integrated cir The output of IC2 a is fed to the saiudoa y weindog 7664 ANF a eo Popular Electronics July 1997 p p 1 MEG SENSITIVITY Fig l The Heartbeat Machine is comprised of three integrated circuits ICI through IC3 a transistor Q1 a transducer and a hand ful of support components Key to the circuit s operation is the transducer composed of LEDI and R17 which is used to detect the flow of blood in the finger non inverting input of IC2 d anoth er op amp configured as an AC amp with a gain of 46 Together
34. d like to leave Of course you ll still have to commit to see in person both a car and the person selling it but only after you re confident you ve chosen the right vehicle to meet your needs Autoweb When first learned about the World Wide Web thought it was aptly named Webs convey a sense of broad coverage and for that reason denn Sore A Salisied Customer a a SAVE TIME March 10 1997 SAVE MONEY Eome 535 Find out why Fulteveb on Your Next New Vehicle interactive NewCar Program saves you time S wotoWieb arms you wath althe facts and money and figuras you l need to kaow abaut Over 600 dealers rare and use care represented AutaWWeb saved me time shopping Select a make think itis the best way to buyacar Zip Cede E E 1 cot 2 Tree fone es cette a a ot conned er eae che EEEE E RE te Pee des tion of the site more on this later If you re not into chaos look instead at the listing of areas of interest found to the left of the site Choose from Dealers 1997 Vehicles Used Vehicles Free Ads Autos Wanted AutoTalk Specials Loan Calculator and others Lets look at each Dealers lets you find a good car dealer in your area who is affiliated with AutoWeb What are the benefits to choosing such a person or dealer ship Well for starters not only can you be armed with important make and model information before you enter the DAN KARAGIANNIS showroom but you j
35. directly to the circuit board ri cell ainda XTR300EZ XTL3000EZ XTL1000EZ Uses new Microwave Transmit to any Scanner type receiver Integrated Circuit amplifier 79 95 99 95 69 95 meee Adjustable sensitivity XTR300 XTL3000 XTL1000 Audio jack for privacy ear phone TRACKING TRANSMITTER KIT LONG RANGE TRANSMITTER KIT TRANSMITTER KIT Any intercepted signal causes an audio f Transmits continuous beep beep beep Sensitive built in microphone Sensitive built in microphone tone that increases from a low pitched ideal for locating lost or stolen items Range up to i mile Range up to 1 2 mile growl 10 a high pitched squeal as the sig Range up to 1 mile Custom frequencies available Custom frequencies available f RaLEROnTIR eases e F ame 88 108 MHz FM TRANSMITTER KITS XST 500 Voice transmitter Range upto1 f mile Supersensitive mic Uses 9 volt battery Zs oe pame Pa Uses surface mount components ney Ca i XWB 1000 Voice transmitter Range up to yy 1 2 mile Includes mic and battery on circuit board Uses surface mount components XST 500EZ XWB 1000EZ XFM 100C XFM 100 Voice transmitter Range up to 1 49 95 46 95 21 95 mile 9 v battery and leaded components XSP 250 Super miniature telephone transmitter Range 1 4 mile Powered by 5 se mS phone line Uses surface mount component as i f XTR 100 Tracking transmitter Range up to XSP 250EZ XTR 100C 34 95 Worlds smallest FM radio
36. flow One way to blackout its envi ronment is to place the transducer into a small light proof covered box The box should have a small hole in it that allows your finger to be inserted to rest in its proper loca tion Another method is to perform the test in a very dark area Connect a 9 volt battery to the circuit apply power and measure the voltage at the output of the regulator Your meter should read between 4 75 and 5 25 volts Allow a few seconds for the circuit to set tle down With no light striking the photocell measure the voltage at pins 1 and 7 of IC2 The reading should be about 2 5 volts Expose the photocell to light while observ ing the voltage at pin 7 Note that it moves or 2 volts in each direction as the light source is applied and removed from the photocell If you get a different response check battery voltage and polarity under load to be sure it is at least 8 volts Check the orientation of C1 C11 and Ul Measure the voltage at pins 13 and 14 of IC2 to verify that it is about 2 5 volts If not remove power and check all components associated with IC2 Check the board for opens shorts and bad solder joints Try a new chip After repairing the fault proceed with the test Set the sensitivity control to the maximum clockwise position so that the voltage at pin 9 of IC2 c is about 2 volts for maximum circuit sensitivity Place the transducer assembly into the light proof box and rest your i
37. for CO and 47 for NO n i 90 J a R 5 5 9 60 O uj 50 uj EES i A0 r o BS 30 Lu PES Oo RBE i O AE 0 NMHC AFTER REPAIRS AFTER RETROFIT AFTER 48 000 KM Fig 2 Reduction in hydrocarbons carbon monoxide and nitrogen oxide emissions thn the various phases of testing the KAT 200 system As Is emissions were measured as the vehicles were received at the testing site The 48000 km condition is only for the six vehicles in the duration testing A prototype retrofit program is being sponsored by the San Diego County Air Pollution Contro District SDCAPCD The program has been funded to retrofit 1250 vehicles over the next three years Using cost shar ing with revenue collected from vehicle registration fees the district can give owners of vehicles that fail bi annual smog tests and cannot be repaired under California cost limits two options scrap the vehicle and accept 600 or pay a maxi mum of 150 to prepare the vehicle for the KAT retrofit f the owner decides on the retrofit the vehicle is taken to the retrofit repair station which deter mines if it can be repaired That ensures that the owner s or district s funds are not wasted on a non repairable vehicle If the vehicle is repairable the Owner pays up to 150 to tune and prepare the vehi cle for retrofitting The district then pays 500 to retrofit the vehicle Now the owner has a vehicle
38. opcode tables control bit assignments It could just as well have been written in Greek Maybe it was Then it occurred to me this whole kit was meant for someone who already knew what he was doing The microcontroller kit looked insur mountable but there wasn t enough time to go back to the dis crete IC approach sure couldn t hide in the bushes and key the transmitter myself There was only one solution was just going to have to buckle down and figure out enough about microcontroller programming to get myself out of this jam T minus five days and counting On the next available night sat down with the kit The first thing to do was to figure out how to pro gram the thing The ADAPT 11 came with a three foot cable with a DB 9 connector on one end and a three conductor header plug on the other plugged the cable into my computer and the other end into the ADAPT 11 popped the board into a standard prototyping board and jumped the five volt and ground pins to their respective sockets According to the book the board came pre loaded with a dust Training Independent study from CIE will give education at CIE matches or you the skills you need to win your own exceeds those gained through independence ina successful career At CIE we pride ourselves in keeping pace with the latest developing technolo gies In turn this assures our students that upon graduati
39. still high quality still or highest quality still the picture type color black and white color negative or black and white negative and whether new pictures use the same window create a new one or create a storyboard You can choose whether to show the picture while the software is processing it or to wait until it s finished You must also tell it whether you are using the video through jack to connect to a video monitor Snappy will electronically terminate the output if it s not in use The Preview mode presents a 160X 120 pixel black and white thumbnail of what the video source sees sort of Its low frame rate about two frames per sec ond makes it a poor way to snap just the frame you want That s why the video through jack is there It allows you to watch the video real time on a monitor Once you see the shot you want it s time to hit the Snap button The magic begins and Snappy grabs a field of video or maybe more depending on your choices in the Setup menu If you are snapping a moving image and you chose that in the Setup menu then you ll cap ture one field of video If you re shooting a still image and you have a stable video source playing laserdisc TV broadcast or live camera but not a video tape then you can grab a one frame two field image for higher resolution Choosing High Quality Still will tell Snappy to grab four fields and Highest Quality Still will grab eight fields
40. those two amplifiers which are connected in cascade provide a total gain of more than 2000 That produces an output voltage varia tion of one or more volts at the out put of IC2 d at pin 7 Capacitors C2 and C3 are included in the feed back loops of the two AC amps to limit their high frequency responses Note that a voltage follower com prised of IC2 b along with R7 and R8 form a low impedance voltage source The output of the voltage follower divides along two paths In one path the output of IC2 b is used to bias the non inverting input pin 3 of IC2 a at about 2 1 volts since IC2 a drives IC2 d directly that amplifier is also biased at the same voltage Each time the heart beats a surge of blood passes through the finger That variation of blood flow causes a change in the amount of light striking R17 the photocell which has a resistance of 500 000 ohms in total darkness and increas ing to 3000 20 000 ohms depending on increasing light intensity causing its resistance to change That in turn varies the voltage across the photocell and therefore the voltage applied to U2 a The waveform produced see Fig 2 rep resents the flow of blood The output of IC2 d at pin 7 is fed through R12 to IC2 c another op amp one con figured as a voltage comparator A voltage comparator is a high gain amplifier that compares the voltage levels applied to its inout terminals and always generates either a logic 1 o
41. 1 28 PM 129 199 9mV DC 3 1 2 Digit LCD 3 1 2 Digit LED 4 1 2 Digit LCD PM 328 4 1 2D LCD Digital Panel Meter Features e 200 00mvV Full Scale Input Sensitivity Single 9V DC Operation Decimal Point Selectable 1 mm LCD Figure Height Automatic Polarity Indication Low Baner Detectlon and Indication High Input Impedance gt 100 Mohm Specifications PM 328 199 99mV DC e Vol b Maximum Input Maximum Input i A ese egies Maximum Display 1999 counts 3 1 2 Digits Maximum Display 19999 counts 4 1 2 Digits w Automatic Polarity Indication w Automatic Poiarity e pH Meter e LUX Meter Indication Method PM 128 LCD Display Indication e dB Meter e LCR Meter PM 129 LED Display indication Method LCD Display e Watt Meter e Other Industrial Measuring Method Dual Stope Integration Overrange Indication 1 Shown in the Display A D Converter System Input impedance gt 100 Mohm e Current Meter amp Domestic Uses Overrange Indication Shown in the Dispiay Accuracy PM 128 3 1 2D LCD Digital Panel Meter Reading Rate Time 2 3 Readings per sec Power Dissipation IMA DC Input impedance gt 100 Mohm Decimal Poi Selectabl ire J PM 1 29 3 1 2D LED Digital Panel Meter Accuracy 0 5 23 5 C lt 80 RH a O 9V DC poe noe Features Power Dissipation PM 128 ImA DC Size 67mm x 44mm e 200mV Full Scale Input Sensitivity PM 129 60mA DC Decimal Point e PM 128 Single 9VDC Operation Selectabl
42. 1 800 826 5432 _ FAX 818 781 2653 INFO 818 904 0524 INTERNET http www allcorp com _ QUALITY jaime aE PARTS Or E MAIL For A FAST Free 96 Page Outsid DISCOUNT e the U S A PRICING alle Eee 410 UF 300 VOLT PHOTOFLASH CAPACITOR Rubycon 1A2304A 0 7 dia X 1 7 Jong Right angle PC or sdiderieads on 0 25 centers CAT PPC 410 10 for 18 50 200 for 320 00 AUTOMOTIVE POWER CORD 00 each D y 3 foot wire Cigarette lighter plug to 2 1mm co ax plug center positive a CAT CLP 33 50 10 for 12 50 each 100 for 100 00 6 12 Vdc MOTOR Mabuchi 2S 375S 16115 1 08 dia x 1 75 long 0 9 dia shaft is 0 5 long Solder terminals CAT H 75 DCM 80 s1 each HI 8 VIDEO CASSETTE USED SONY Hi 8 J OO Top quality metal 200 particle 120 minute video cassettes Used for a short time then bulk erased Each cassette has its own plastic storage each box Satisfaction Guaranteed CAT VCU 8 10 for 28 00 100 for 250 00 EE VAN NUYS CA 91408 0567 E MAIL allcorp allcorp com NO MINIMUM ORDER All Orders Can Be Charged to Visa Mastercard American Express or Discover e Checks and Money Orders Accepted by Mail e Orders Delivered in the State of California must include California State Sales Tax NO C O D Shipping and Handling 5 00 for the 48 Continental United States ALL OTHERS including Alaska Hawaii P
43. 1993 Copyright Clearance Center INSIDE CRYSTAL SETS The portable z programmer amp that uses the printer port of your PC instead of a internal card Easy to use software that programs E E prom Flash amp Dallas Ram 27 C 28 C F 29 C F 25 series from 16K to 8 Megabit with a 32 pin socket Adapters available for MCU s 874X 875X Pic 40 An easy to read book on crystal set theory and construction opens vistas for novices and pros alike Build radios like Grandpa did do it better and know what you are doing The Crystal Set Handbook THE CRYSTAL SET HANDBOOK O PRWTER PORT THE POCKET PROQRAMMER PHILIP N ANDERSON Pin X 16 amp Serial Eprom s PLCC 5 Gang published by The and Eprom Emulator to 32K X 8 Crystal Set Society is an authentic guide on Same Name Address amp Phone for the topic 13 Years intronics Inc Box 13723 612 Newton St Edwardsville KS 66113 Add 4 75 COD Fel 913 422 2094 Add 4 00 Shipping Fax 913 441 1623 Visa Master Charge isn t it Amazing To order The Crystal Set Handbook send 10 95 plus 4 00 for shipping in the U S and Canada only to Electronics Technology Today Inc P O Box 240 Massapequa Park NY 11762 0240 Payment in U S funds by U S bank check or International Money Order Please allow 6 8 weeks for delivery amp American Heart As
44. As small as a hearing aid Weighs less than 1 4 oz saan recat ee ye en a ee Digital touch tuning ideal for use with our 88 108MHz FM transmitters 1 mile Uses 9 volt battery Transmits a BEEP f Tr 100C BEEP BEEP tone 19 95 XTT 100 Telephone transmitter Range up to 1 mile Uses 9 volt battery __ E ENFORCER n PHONE VOICE CHANGER KIT 16 levels of digital voice changing Sound tougher older or younger female or male NEW Works with regular A or multi line phones Connects between handset and phone Note will not work with cordless or cellular type telephcnes XVC 2005C 59 95 XPC 200 PIN HOLE CAMERA XVS100 400 LINE RESOLUTION TV TRANSMITTER Audio and Video outputs Use with XVC200 See entire room through VCR Camcorder etc pin sized hole Power cube included Use with any TV or VCR Uses VHF TV Band with audio amp video input Transmits video amp connectors audio Other models available Up to 100 foot range Assembled 169 95 E Z Kit 29 95 XXE 1000 as a kit 39 95 assembled 49 95 Use it to test radar detectors in other cars f from your own vehicle 10 450 tO 10 550 GHz hand held transmitter Extra high output level f Includes an input connector for keyed ama f teur band operation XAN
45. Called e Radio Frequency qe Taps Body Wires BODY WiRE In Sick Or e Series and Parallel Taps e FM Wireless Mics DETECTOR e AM Transmitters e Line Impedance Taps e UHF Transmitters Extension Phone Listeners emesis Showed Up Late Never Taken A Vacation Or A Holiday Never Asked For A Raise Or Griped About His Bonus And Believe It Or Not Has No Plans For Retirement Al 5500 COMPLETE SAFETY SYSTEM DETECTS All Phone Taps and Extension Phone Listeners All Body Wires Wireless Mics AM FM and UHF Transmitters DEFEATS e Ali Body Wires Transmitters and Distance Microphones with its built in white noise generator TRVD 900 TRANSMITTER TAPE RECORDER amp ViDEO DETECTION SYSTEM DETECTS Body Wires FM Wireless Mics AM Transmitters e UHF Transmitters e Tape Recorders Video Equipment PSST Alerts User By Vibrating and or Illuminated LEDs WSS 100 WIRELESS SURVEILLANCE SYSTEM Sees amp Hears EVERYTHING FEATURES 2 4 GHz Video Audio Transmitter 4 Channel Receiver 300 Transmission Range Black amp White CCD w Auto lris Lens e 410 H TV Line Resolution e FCC Approved Frequency senso AMERICAN INNOVATIONS ING Deters Thanks ben M 119 ROCKLAND CENTER SUITE 315 NANUET NY 10954 Distributors E ges Voce 914 735 6127 Fax 914 735 3560 Welcome FREE w Purchase wr7p NWN SPYSITE COM E Man AMERICAN SPYSITECOM Prices valid thru 97787
46. Cb See text Ai 470 ohm 1 watl 5 resistor Li inductor see text IGi NE602 Philips NEGOZA for a center frequency of 15 MHz Feedback for the NE602 is taken off at the tap of coil L1 The feedback tap is about 1 to 1 5 of the way up from the ground end of L1 The sinusoidal wave output is sampled at pin 7 through cou pling capacitor C6 Choose a value for this capacitor no greater than 15 of the value of tuning capacitor C1 The NE602 s oscillator also operates with other resonance circuits such as Crys tals piezo elements and other LC configurations There s many more great ICs in cir culation suitable for oscillator action but we ll have to take a look at these at a later date May all of your oscillators oscillate at the correct frequency See E you here next month ep yy i C5 R1 i00 4709 C6 at Muscular Dystrophy Association 800 572 1717 er rr ee _ SCANNER SCENE Continued from page 60 use 156 65 MHz Around busy harbors you might also be able to monitor low power dockside communications on the 457 525 457 60 and 467 75 467 825 MHz bands Digital Data Responding to a reader last February we stated that digital mode communications cannot be monitored successfully using present era scan ners Well you just knew we would get called out with a remark like that We pass the following information along with neither comment nor confirma
47. Cia Pa ceramic dise O PARTS UST top age 25 WVDC electrolytic 3 FIG 6 Capacitor ee Ri 470 ohm Yawati 5 resistor TiS text sR2 S 0 000 ohm potentiometer Fi Potentiometer sea text Rai 00 ohm potentiometer ee Be IC1 4047 National Semiconductor ICi LM3909 Radio Shack 276 CD40478C pe Z 1705 O E O m Ham Radio Hanging Loop Antennas here are a number of different loop antennas that can be built and for the higher frequency bands they can be reasonably sized have received a lot of correspondence over the years about those antennas and also about antennas for people who have limited space The loop antenna described in this column is small and will find many applications It is called the hanging loop antenna Figure 1 shows the basic concept for the hanging loop antenna It consists of two half wavelength 2 ele ments spaced one sixth wavelength 6 apart The horizontal elements are made with aluminum or copper tubing of either 0 75 inch or 1 inch diameter In a pinch you can also use wooden dowels of about 1 inch diameter with antenna wire running along the length The vertical elements are made of ordi nary antenna wire although if you want to use aluminum tubing it s all right The feedline to the transmitter is 52 ohm coaxial cable which is con nected to the antenna with a 4 1 balun transformer The connection points of OVERHEAD SUPPORT EARTH R
48. Interface 1 049 96 Switchable between digital and analog modes PS 200 20 MHz DUAL TRACE 339 95 PS 400 40 MHz DUAL TRACE 494 95 2 K werd per channel storage PS405 40 MHz DELAY SWEEP 569 95 8 bit vertical resolution 25 Lerel div PS 605 60 MHz DELAY SWEEP 769 95 Expanded Timebase 10ms div 0 5 s div PS 1000 100 MHz DUAL TRACE 999 95 Refresh Roll Save all Save CH2 Pre Tng DC Power Supply Triple Output PS 8202 499 95 Two0 30 VDC 034 outputs Scope Probe 60MHz x1 x10 15 100MHz x1 x10 22 250MHz x1 x10 29 250MHz x100 39 Ae Mall hh a a DC Power Supply PS 303 159 00 0 30 VDC 0 3A output Constant voltage amp constant current mode Ka 4 i One fixeci SVDC 3A output _ 0 02 2mV ine reguiation ea e i Capabie of independent or tracking operation 0 02 3mV load regulation ti 8 ory Constant voltage and constant current mode 1 mVmns noise and ripple Four digital meters for volt and current display Short circuit and overload A Excetent regulation and low ripple PS 8200 with digital voltmeter 179 00 Le Short circuit and evonond protected io Aiso available 30V 5A 60V 3A 60V 5A Also avakable 30V ple output 549 95 Dual tracking 30V 3A 30VAA 60V 3A 60VAA JEV 10A 30V 10A tm wT Tm s we poan ue i are LA w gmg a pe Emt sam LODER TAF a mee ae eal a m gi w ar ee RH a i tato ANGE pa agr s w th a RF Signal Generato
49. LABOR WARRANTY ALFA ELECTRONICS FAX 609 897 0206 CALL WRITE FAX FOR FREE CATALOG P O BOX 8089 Princeton NJ 08543 8089 Visa Master Card American Express COD Purchase Order Welcome l CIRCLE 26 ON FREE INFORMATION CARD E B l s lu04498 3 seindog 7661 ANF WO a al 479 MOD MCT EMUPA Seles 408 241 7376 Fax 241 6375 BBS 983 1234 Web www ganeraldavice com E Mail icdevice best com Popular Electronics July 1997 Learn MICROCONTROLLERS EMBEDDED SYSTEMS and PROGRAMMING with the AES learning system embedded control system Extensive manuals guide you through your development project All programming and hardware details explained Complete schematics Learn to program the LCD keypad digital analog and serial I O for your applications THREE MODELS AVAILABLE Choose from an Intel 8051 intel 8088 or Motorola S8HC11 based system All models come with 32K Byte ROM 32K Byte RAM 2 by 16 Liquid Crystal Display 4 by 5 Keypad Digital Analog and Serial 1 0 Interrupts timers chip selects 26 pin expansion connector Built in Logic Probe Power it most AN IMPORTANT PART OF YOUR PHOTOCOPIER ISN T PART OF YOUR PHOTOCOPIER Supply can also be battery operated Powerful ROM MONITOR to help you program Connects to your PC for programming or data logging cable included Assembly BASIC and C programming varies with model Program d
50. RNJ Electonics Inc New 1997 Catalog RNJ Electronics Inc a distributor of electronic products since 1981 is now offering their new 1997 catalog The catalog contains 136 pages of test equipment TV and VCR repair parts elec tronic kits instructional videos tools amp soldering equipment CCTV systems commercial sound amp intercom systems as well as parts and acces sories In addition the catalog also contains breadboarding aids digital trainers as well as A V carts screens and projectors 2 00 For a Catalog call 1 800 645 5833 number 509 in coupon A M C Sales Inc A M C Sales Inc a 27 year oid company spe cializing in Electronic Surveillance offers its cat alog which contains equipment of all types for the individual and or company who are active in Electronic Surveillance 80 to 100 items are dis played and priced a must for the amateur and or professional 5 00 number 507 in coupon Global S scialiias Electronic Testing amp Prototyping Equipment Global Specialties offers a catalog and new product short form insert This package includes product descriptions and specifica tions for a new 1 GHz spectrum analyzer scope adapter AC RMS power line analyzer full range of AC amp DC power supplies function and puise generators frequency counters capaci tance meters logic probes amp logic analysis test kits breadboard design workstations a line of protoboard systems amp quick te
51. Spectrum Analyzer at a very affordable price Great for interference and signal hunting RS232 connect for logging signals to disk Real time display Sweep outputs on any X Y scope Variable span and sweep rate Marker function and selectable bandwidth Demods in AM NFM WFM plus BFO for CW SSB modes For instant information use our fax back service at 317 849 8683 405 Or email Scanns www ace coms com http www acecomms com Scanns aet Order Line 1 888 445 7717 10707 E 106th Fishers IN 46038 Intemational 317 842 7115 Fax 317 849 8794 Email Scanns www acecomms com CIRCLE 25 ON FREE INFORMATION CARD ag z so gt a 0 h RELAYS LIGHTS MOTORS TEMPERATURE PRESSURE LIGHT LEVELS HUMIDITY SWITCH POSITIONS THERMOSTATS LIQUID LEVELS MODEL 30 _ CIRCLE 45 ON FREE INFORMATION CARD FM TR A NSMITTERS TOLL FREE ORDER LINE 1 800 336 7389 FAX LINE 1 602 731 4748 FUN PROJECTS TECH SUPPORT NUMBER 1 602 829 0755 AND MORE XANDI ELECTRONICS INC PRICES SUBJECT TO CHANGE WITHOUT NOTICE YOUR MANUFAC TURER OF HIGH QUALITY K ITS 143 775 MHz CRYSTAL CONTROLLED TRANSMITTER KITS If _ BUG DETECTOR XBD500 Oe SEE Professional quality CRYSTAL TRANSMITTER KITS Ultra miniature surface mount construction E Z kit approach makes assembly a Snap r Asse i nap y Miniature battery and holder will mount me DE
52. Steckler EHF CET editor in chief and publisher EDITORIAL DEPARTMENT Julian Martin editor Robert Young technical editor Edward Whitman associtste editor Teri Scaduto assistant editer Evelyn Rose editorial assistant Joseph J Carr K4IPV contributing editor Marc Ellis contributing editor Jeffrey K Holtzman contributing editor Don Jensen contributing editor Charles D Rakes contributing editor Marc Saxon contributing editor Marc Sprwak conliibuling editor John Yacono contributing editor PRODUCTION DEPARTMENT Ruby M Yee production director Ken Coren deskiop procuction dirochor Lisa Baynon desktop production Kathy Campbell Procuction assistant ART DEPARTMENT Andre Duzent or director Russell C Truelson illustrator CIRCULATION DEPARTMENT Theresa Lombardo circulathan menager Gina L Galle fireulalicn assistant Michele Taorrillo POPULAR ELEC TROMICS baokstorr BUSINESS AND EDITORIAL OFFICES Sernsback Publicetices Inc S00 Be Counihy Blvd Farmingdale NY WF 35 1 516 293 3000 FAR TSI 23 3118 President Larry Steckler SUBSCRIPTION CUSTOMER SERVICE ORDER ENTRY LeO0 B37 0383 7 30 AM 6 90 PAA EST Advertising Sales Offices listed on poge TIO Composition by Males Graphics Cover by Loewy Design Cover Illustration by Chris Gould PY ABC AUDITED Since some of the equipment and circuit ry described in POPULAR ELECTRONICS may relote to or be covered by U S patents POPULAR ELECTRON
53. The values of R1 and C1 set the basic frequency range and the voltage at pin 9 varies the frequen cy Minimum voltage at pin 9 produces a minimum frequency and maximum voltage produces a maximum frequen cy Resistance R2 determines a fre quency operating window minimum to maximum frequency range by rais ing the minimum frequency and increasing the maximum frequency One method to use in setting the fre quency window is to make R2 a vari abie resistor approximately ten times the value of R1 and use it to fine tune the window limits For a desired frequency range choose capacitor C1 from the following values 1 0 uF Popular Electronics July 1997 less than 1 Hz to 100 Hz J 0 1 uF 10 Hz to 1 kHz and 0 01 uF 100 Hz to 10 kHz The 4046 package also includes other goodies A dual phase detector is included which allows the 4046 with added components to become a full fledged PLL Since we are only dealing with oscillators this time around these features might show up here at a later date Multivibrator In our next circuit see Fig 6 we go up one number in the CMOS line to the 4047 Multivibrator IC operating in the astable free running mode This IC offers three square wave output wave forms The oscillator s fundamental fre quency appears at pin 13 Outputs at pins 10 and 11 appear at one half this frequency and are phased 180 degrees apart If you need a square wave
54. Tools that are found in Guided Activities plus a fifth one called smudge We had a good time using Adobe PhotoDeluxe To get a feel for some of the options we took a photo of our son matted it with an oval outline colored the mat wrote his name in contrasting let ters down the side and framed the entire image We liked it so much we used the framed image for his birthday party invi tations Next we made a calendar using seasonal photos taken in the garden at the beach raking leaves and building a snow man We plan to create home made Christmas cards next year and to mail quite a few of them electronically E It s a Snap SNAPPY VIDEO SNAPSHOT VIDEO DIGITIZER From Play Inc 2890 Kilgore Road Rancho Cordova CA 95670 6133 Tel 800 306 PLAY 916 851 0800 Web http www play com Price 199 95 Digital cameras are still in their infan cy and the pictures that they take show it But the things that you can do with them from creating custom greeting cards to posting them on the Web sound like a blast Fortunately you don t have to invest big bucks on an emerging technol ogy to be able to have the fun of playing with digital photos on your computer If you own a camcorder there s an easy and relatively cheap way to get high quality images into your PC the Snappy Video SnapShot V2 0 from Play Inc Snappy digitizes video images from your camcorder and allows you to dow
55. VIDEO AUDIO SYSTEMS amp VIDEO SURVEILLANCE EQUIPMENT SEND FOR FREE CATALOG NETWORK your phones Boost your telecommunication performance Make small business sounds big amp professional FX207 is easy to use and very low cost This smali device provides same functions found in big expensive PBX units Call transfer conference intercom do not disturb call restriction blocking Call pickup call waiting Plus some extras you don t normally find in most regular PBX units such as Voice direct incoming calls with your own message transfer fax automatically Tele remote control your appliances or computer Record and manage call numbers amp time usage through your computer You might even use it for phone projects control phone operation with PC For home For office For home office FX207 handles two phone lines expanding to seven extensions using standard tone or rotary phones FAX and answer machines Plug in with regular phone plugs Easy to install Do it yourself 298 limited time special Plus S amp H California add sales tax Discount Code X4PE MSRP 399 Taw Cost CAD Software for the IBM PC and Compatibles Now In Windows w Design amp Simulation Easy to use schematic entry program SuperCAD for circuit diagrams only 149 Includes netlisting bill of materials extensive parts libraries More parts and automatic wd available in
56. Windows 95 does not have the ideal user interface such a thing probably doesn t exist The advantage of Windows 95 of course is that it allows software publishers to main tain some consistency in how their pro grams operate Kai s Power Goo is a 32 bit program that runs under Windows 95 or NT only it won t run on Windows 3 1 It requires a 486 or better processor The software is also available for the Macintosh platform and requires a 68040 or better processor MetaTools does away with the clutter and confusion of a complicated or rigid menu structure but we re not convinced that it really advances the state of the art of user interface design Making it UnWind impossible to access the start menu or desktop is not our idea of an improve ment even if as MetaTools claims it reduces the clutter that might interfere with our creative processes Kai s Power Goo is primarily a way to have fun with digital images Anyone can have a go at it kids who want to make their friends look goofy adults who want to make their bosses or favorite politi cians look devilish What makes it so much fun is that the effects are virtually immediate at least on a 133 MHz Pentium based machine Pick a nudge Goo brush brush it on the image and the image responds as if you literally had pushed it MetaTools calls what it does liquid imaging If you re used to image editing programs where every chang
57. a broad rich and comprehensive be next Electronics Technician YES Please send me more information on CIE s Associate Degree Program CIE s Career Courses World College s Bachelor Degree Program Name Address City 1776 East 17th Street Cleveland OH 44114 216 781 9400 1 800 243 6446 Phone Check for G I Bill Active Duty Veteran AH96 Soiugdjoa q Jeindog 766i ANF n n Popular Electronics July 1997 on m demonstration program wired up a small amplified speaker to one of the output ports as the manual sug gested and hit the power The speaker dutifully beeped twice stared at the board no smoke or steam was coming from any of the parts so far so good loaded a terminal program into the comput er and set the communications parameters as the book stated hit the enter key and a small menu appeared on the screen Well the board was alive The menu was simply a system that let the user perform a variety of operations on the board via the RS 232 port For example hitting A caused the board to output the status of the eight different inputs on the A Port Hitting O to 7 caused the corre sponding output of the B Port to toggle from high or tow Hitting one key caused the speaker to beep and another displayed all the val ues present at the inputs of all eight analog to digital converters While there wasn t a pre built foxhunt transmitter controller
58. a i i EDE Spy Outlet The Latest High Tech Professional Electronic De vices Our latest catalog offers a HUGE selec tion of surveillance counter surveillance priva cy devices hidden video equipment pinhole camera w audio 159 electronic kits telephone recording systems 7 Hour 125 16 Hour 199 touch tone decoders scanners bug phone tap detectors voice disguisers telephone scramblers locksmithing tools and more 5 00 number 510 in coupon IEC We ure committed to quality products Kit Products Catalog Orders 423 584 8600 COPYRIGHT 1997 lajemanonal Electronics Corp ALL RIGHTS RESERVED International Electronics Corporation International Electronics Corporation offers a variety of quality SMT kits for students and hob byists as well as engineers Our 1997 catalog contains pictures detailed descriptions and pricing of ail kits currently available as well as manufacturing services offered 2 00 number 511 in coupon Circle the numbers of the items you are ordering Completely fill out the Coupon Enclose your payment add 1 50 for service and handling 500 American Eagle Catalog 2 00 508 California Digital Catalcg 2 00 501 American Innovations Catalog 6 00 509 RNJ Catalog 2 00 502 Antique Radio Classified 4 00 510 EDE Spy Outlet Catalog 5 00 503 All Phase Video Security Catalog 2 00 511 IEC Catalog 2 00 504 Consumertronics Catalo
59. although Snappy grabs eight video fields it doesn t grab eight consecutive video fields Keeping that factor in mind we found one of the most impressive things about the Snappy is the packaging that it comes in OK it s just a cardboard box with four color images just what you d expect to find on a typical computer peripheral box on the shelf of your local computer superstore But those profes sional looking glossy images were all acquired by a Snappy Now that indicates that Play has confidence in its products And why not There s really nothing that comes close to what the Snappy can do especially when you take price into con sideration Once you ve captured your images and saved them to your disk it s time to start putting them to use The Snappy Version 2 package gives you a couple of excellent ways to start making the most of your captured images and to start having fun Keep reading for descriptions of Morph and Kai s Power Goo iE Cool Tools KAI S POWER GOO SE Published by MetaTools Inc 6303 Carpinteria Ave Carpinteria CA 93031 Price N A OEM version supplied with Snappy Video SnapShot Every once in a while unfortunately not very often someone comes along and shows how things can be done differ ently Before Aldus introduced Page Maker for example WYSIWYG and per sonal computers had never met Before NCSA Mosaic Web pages containing both text and graphics didn t exis
60. and material used to minimize radar and laser reflections tactic and strategy to fight speeding tickets THE PLACAK REPORT 29 How to read and d t the magnetic flux reversals on popular credit and debit card ma stripes How to determine the decrypted PIN PAN bank number dates number of uses remaining No hardware needed HIGH VOLTAGE DEVICES 29 Many HV device plans Stun Gun Taser Prod Cane Flasher Blaster Zapper Radar Jammet Jacob s Ladder Fence Charger Geiger Counter Fish Stunner much more RADIONICS MANUAL 29 Exciting electromagnetic therapeutic diagnostic devices mostly experimental Descriptions plans availability ROCKET S RED GLARE 29 The most definite and comprehensive source on solid pro pellant survival and amateur rocketry Many plans FREE 14 How yowu can get FREE money jobs land housing meals medical care equipment me dise much more POLYGRAPH DEFEATS 19 How anyone can tell the truth to a He detector Many proven methods to beat the test and what to avoid SHOCKING THEULTIMATE Pe i MATE EL Re Jace naw Tor secnsr How to lie cheat a CATALOG FEATURES steal influence and baie lal Le intimidate your way Stow Your binant to success Under Bait 83 i aid Overworked t 3 OR arassed Manipulated Forget p WITH ORDER nce This manual outlines what ORDE it really takes to make it to the top in TODA today s corporate BS world 19
61. and optional equipment specifications reviews and more You can also click on Edmund s Road Tests of New Cars to find out how vehicles performed and even get advice on affordable car insurance HOT SITES AutoWeb http www autoweb com Edmund s Buying Guides http www edmunds com New Truck Information is also avail able Edmund s Complete Updated New Trucks Book features over 500 pickups vans and sport utilities Similar information to the New Car list ings is given here as well Previously owned vehicles are a growing market and Edmund s is keep ing up with it in Used Car Information Just like with the other headings there s an Edmund s Complete Up dated Used Cars Book Read about prices ratings reviews recalls and more dealing with cars from 1987 1996 But information on buying isn t the only thing you ll find here Edmund s Safety Information fills you in on what cars will protect you the most and contains facts about things like day time running lights and traction control That about wraps it up for this month hope your vehicle hunting goes well Join us again next time for another look at all the Net and Web have to offer F ocket computers haven t caught i on like desktop systems or even notebook systems have It s just that they re usually so small and have such limited resources that most people find themselves able to resist purchas ing one Sometimes it s ver
62. and can be configured for either toggle or momentary action 32 00 ro Kit souosjoaty weindogd Z664 ANF 115 I Save 1000 s CLASSIFIED vipment i HACKERS software and information on every Ta lia ial ee MISCELLANEOUS thing else you want Cali BOXCOM 1 800 ELECTRONICS FOR SALE 345 7800 THE Case Against Patents Thoroughly tested GET electricity from you pene line Pians to and proven alternatives that work in the real world build the device Send 23 00 to BOXCOM P O 28 50 SYNERGETICS PRESS Box 809 C Box 696 Plant City FL 33564 Thatcher AZ 85552 520 428 4073 Visa MC ALTERNATIVE free energy government sup FM Micro Broadcasting 88 108MHz As pressed and electronic weapons Many plans sembled PLL transmitters and rf amps mono ster and kits available eo 1 00 UNLIMITED 60 1 2 100 watts Photo ee Aah call 250 UNDERGROUND ELEC CS 1839 D West 642 2859 R SCOTT COMMUNICATIONS LTD Vistaway 515 Vista CA 92083 ninteach in We ship world wide from Canada com net 619 414 6631 VM an aoee INTERNATIONAL clients wanted Can do engi neer locates purchases ships U S technica products systems parts services worldwide Our job Get the facts get you what want Professional confidential discreet Fax today r COMPUTER SOFTWARE AOL hacking tricks amp software information Send Mayda Cae Teles OLE SEO TECH BOX 54 0
63. as long as the AUDIO IN Fig 6 Assemble the tone decoder board guided by this parts placement diagram As with the tone generator be sure to install the low profile components first followed by the taller components Again sockets are recommended for all ICs except the regulator IC3 Note however that a socket is absolutely necessary for the display DISP gt lies a soluojoa 3 seindog 7661 Ajnr gt _ Popular Electronics July 1997 Ja RS PARTS SOURCES SURPLUS NI CD BATTERIES Falkner Enterprises PO Box 1378 Ottumwa IA 52501 Tel 515 683 7621 Fax 515 683 7631 Free catalog upon request PARTS SUPPLIERS B G Micro PO Box 280298 Dallas TX 75228 Tel 800 276 2206 Fax 214 271 2462 Circuit Specialists Inc PO Box 3047 Scottsdale AZ 85271 3047 Tel 800 528 1417 Fax 602 464 5824 Debco Electronics Inc 4025 Edwards Road Cincinnati OH 45209 Tel Orders 800 423 4499 Tel Inf 1 513 531 4499 Fax 513 531 4455 Jameco Electronics 1355 Shoreway Road Belmont CA 94002 4100 Tel Orders 800 831 4242 Fax 800 237 6948 BBS 415 637 9025 JDR Microdevices 1801 South 10th Street San Jose CA 95112 4108 Tel Orders 800 538 5000 Fax 800 538 5005 BBS 408 494 1430 Mouser Electronics Mouser Central 958 North Main Street Mansfield TX 76063 Tel Orders 800 346 6873 Newark Electronics Has distributors nationwide To request a catalog call 800 298 3133 ext 48 input
64. audible So if you want a neat way to store and manage your entire CD music col lection be able to play any disc with utmost ease and convenience and obtain a great performer in your stereo system the Technics SL MC6O0 is the CD changer for you For more infor mation on the Technics SL MC60 compact disc changer contact the manufacturer directly at the address provided in the box or circle No 123 on the Reader Service Card DPDT normally closed contacts open thereby muting the stereo speakers Note that diodes D4 and D5 prevent both front and back door chimes from going off at the same time since they both are tied to pin 2 of IC3 In the telephone activated part of the circuit capacitor C1 and Zener diodes D2 and D3 block the phone line voltage which is normally 48 volts Ringing current is around 90 volts AC which overcomes the breakdown volt age of these Zener diodes The posi tive half cycle flows from the positive end of the phone line through R1 the LED portion in IC2 D3 D2 and C1 to the negative side of the phone line The flow of current through the LED of IC2 activates the light sensitive gate of the SCR causing conduction Current then flows through the green Stereo Mute LED1 R2 the SCR of IC3 and from the base to the emitter of Q1 to ground Transistor Q1 conducts and current flows through the collector and relay RY1 to ground RY1 energizes and mutes the stereo as described for the doorbell cir
65. back wards it s bi directional after all and use the same antenna on different receivers or transmitters The use of the coaxial switch in antenna tuning is for comparing the antenna being tested with either another antenna or a dummy load The kind of off the air checks that amateurs and SWLs can make are notoriously inaccurate but can be made a lot more useful by making comparisons with known antennas A friend of mine the late Johnnie H Thorne K4NFU 5 had an antenna farm in Texas and it did seem that he grew antennas judging from the num ber he had He kept a standard dipole optimally installed and cut for 20 meters and made all of his test designs for the same frequency He would compare new designs to the dipole by switching back and forth while monitor ing the signal strength on the receiver S meter He could also compare two different antennas by comparing them against each other or against the dipole Antenna comparisons are a little fuzzy around the edges if you don t have an antenna test range It is wise to make a number of observations and then average the results This is especially true with high frequency antennas where variations along the transmission path are a wild card for the antenna experimenter learned a lot about antennas from my friend Johnnie Unlike a lot of gurus he had notebooks fuil of data to back up his claims He aiso had a lot of old but professional quality instr
66. both you and the dog have in common you both have two eyes a nose two ears and a mouth You would mark those points on the start ing image and then go to the final image and adjust them to the appropriate posi tion Then you can tell the software to create a still image or a movie in which the dog s face fades or morphs into your own The more key points you mark the better You can join the points with key lines You can manipulate the points and lines from either direction working from the start or the finish Working in two directions makes it much easier to get good looking morphs It took us a while to realize that this was possible but once we did our results improved dramatical ly But good looking morphs don t come without a fair amount of work The more points you have the better the results And putting the points in the right place isn t so obvious without a little practice Morph saves movies as either AVI ani mations or QuickTime for Windows You can also save them as Autodesk FLIC animations but then they can t be played back in Morph As impressive as it is to morph two images together it is also possible to morph two AVI videos We were quite impressed by a couple of samples includ ed with the software For example one morph movie showed a woman s head turning into a man s as her his head turned We didn t have the patience to get such good stuff but we got pretty good at cre
67. browsers have been discovered and patched only for new flaws to appear Ny ae Ck JAVA SECURITY Arete Apalcis Hotes ond Amdocs Lo Foyt Dreticupe and Lenman i urr Ley Wasi ie Earr This book informs readers of the risks and provides an intelligent securi ty policy for safe Java use Written for Webmasters information technology managers and concerned Web users the book explains the three prongs of the current Java security modelthe byte code verifier the applet class loader and the security manager It points out the deficiencies in the Java security situation and provides guide lines for safer Java use The book not only identifies and differentiates be tween dangerous attack applets and annoying malicious applets it also sug gests improvements in future Java design for a secure mission critical ian guage Java Security Hostile Applets Holes and Antidotes costs 19 95 and is published by John Wiley amp Sons Inc 605 Third Avenue New York NY 10158 0012 Tel 1 800 225 5945 Web http www wiley com CIRCLE 92 ON FREE INFORMATION CARD Personal Computers In The Ham Shack by Paul Danser N1II amp Richard Roznoy K1OF A recent survey conducted by the American Radio Relay League ARRL about hams and computers revealed not only that the majority of hams have and use PCs in their shacks but that most of them were equipped with State of the art systems with fast processors a
68. camera along with the necessary software and your comput er can free you from having to buy film Gizmo is published by Gernsback Publications Inc 500 Bi County Blvd Farmingdale NY 11735 Senior Writers Christopher Scott and Teri Scaduto Copyright 1997 by Gernsback Publica tions Inc Gizmo is a registered trade mark All rights reserved change roils in the middle of an event pay a photo lab to develop your pictures trust them to do it without over or under exposing them pay for photos that make you look awful pay for copies of good pictures or rely on snail mail to get copies to your friends and relatives The software designed to manipulate digital photos offers a different type of freedom It unleashes your creativity You can crop photos correct red eye remove blemishes and correct color bal ance and contrast Digital cameras have been around for more than a decade Professional models ranging in price from 10 000 to more than 40 000 allow photojournalists to get late breaking stories complete with pictures back to the main office as quick ly as possible And digital cameras can actually reduce costs by speeding up the production schedules in the fast paced fields of magazine publishing print advertisements and catalogs Lower priced models have been popu lar choices for realtors who include pho tographs on computer listing sheets and insurance adjusters who require picture docume
69. collector current flows through relay RY1 to ground RY1 energizes and pulls its time Remember if you d like to win a book from our library send a schemat ic of your working circuit and a thor ough explanation to Think Tank Popular Electronics 500 Bi County Blvd Farmingdale NY 11735 If you send enough usable circuits to fill a column you ll receive a MCL1010 chip and a kit in addition to the book awarded for single submissions 5 TECHNICS TEST REPORT Continued from page 75 course In any event in the opinion of most experts THD would have to reach 1 0 to be audible Similarly for de emphasis and lin earity 3 dB is considered the threshold beyond which other errors become audible De emphasis error measures how accurately the player s circuitry reverses the pre emphasis curve on the disc recording It should be a per fect mirror image but seldom is sym metrical The SL MC60 s errors here at least track with the curve with no gross diversions Linearity error measures the accuracy of the CD player s digital to analog converter DAC section Does it translate each of the 65 536 possible digital codes on the CD to its exact frequency and level The Technics decoder does well enough the worst error is within 0 3 dB and therefore not audible above the Stereo system s inherent noise To keep things honest the linearity error with dither test accounts for system noise again the degree of DAC error is not
70. crg Web nip www arrl org CIRCLE 93 ON FREE INFORMATION CARD 1997 General Catalog from Contact East This 252 page full line catalog is packed with descriptions of hundreds of new test instruments and tools for engi neers managers technicians and hob byists It features quality products from brand name manufacturers for testing repairing and assembling electronic equipment ORDER CALL 1 SoiG8 28000 ot CAM 1 908 808 TR Highlighted new products include the Tektronix TDS 200 series compact digital scopes Fluke s 105B Scope meter and B K Precision s spectrum analyzers The catalog also offers a wide selection of DMMs portable and benchtop digital storage scopes tool kits power Supplies EPROM program mers soldering desoldering equipment breadboards heat guns data commu nications tools and testers measuring tools adhesives precision hand tools and reference books Also featured are Contact East s popular lines of commu nication test equipment static protec tion products ozone safe cleaners magnifiers inspection equipment work benches and cases The 1997 General Catalog is free upon request from Contact East Inc 335 Willow Street North Andover MA 01845 Tel 508 682 2000 Fax 508 688 7829 CIRCLE 94 ON FREE INFORMATION CARD Lingo And Shockwave Sourcebook A Complete Guide to Developing Multimedia for the Web and CD ROMs by Vineel Shah amp John Musser You
71. female terminal and the negative black wire to the male terminal When finished plug a 9 volt battery into the connector and use a DC voltmeter to verify the polarity of the wires When the circuit board is fully assembled examine it very careful ly for opens short circuits and bad solder connections which may appear as dull blobs of solder Any solder joint which is suspect should be redone by removing the old sol der with desoldering braid clean ing the joint and carefully applying new solder It is far easier to correct problems at this stage rather than later on if you discover that your Heartbeat Machine does not work Preliminary Test The circuit must be checked before final assembly by first making four temporary con nections between the transducer assembly the LED1 photocell and common and main circuit board using four pieces of small gauge flexible insulated wire about 12 inches long Be careful when han dling the transducer assembly so as not to break the wires on the pho tocell and LED Additionally LED2 should be temporarily connected into the circuit using wires that are long enough to position the LED so that none of its light can affect the photocell You ll need a DVM or VOM to check out the circuit You can also use an oscilloscope to visualize the slow moving heartbeat waveform at pin 7 of IC2 d The photocell must not be exposed to any light during the test so that it can detect blood
72. fun to use It is bat tery operated for portability and completely harmless to the bystander and user You can try it yourself or on your relatives and friends for enter tainment purposes Find out what external stimuli influence the heart rate The next time you have a party bring it out to break the ice er With MACHINE This fascinating but simple circuit allows you to keep tabs on the rhythmic fluctuations of your heart ANTHONY J CARISTI About the Circuit Figure 1 is a cuits IC1 through IC3 a tran sistor Q1 which is com posed of two components LEDI and R17 a cadmium sul fide photocell also known as a light dependent resistor and a handful of support components Key to the cir cuit s operation is the trans ducer which is used to detect the fiow of blood in the finger The photocell and LED are placed in close proximity to each other surrounded by a light proof enclosure The subject places a finger over both the LED and the photocell Since human body tissue is somewhat transpar ent to red light while blood is not light emitted by the LED is transmitted to the photocell through the finger This pro cess causes the resistance of the photocell to vary in accordance with the sub ject s heartbeat and pulse rate The electrical change in photocell conductivity is detected and amplified to allow the instrument to visual ly display the heartbeat of the subject
73. have to modify the circuit if were to use 8 ohm speakers with the amplifier instead of the 4 ohm speakers men tioned in the article R S Goshen OH The simple answer to your question is that you can use 8 ohm speakers with this amplifier without modification As I state in the article the amp is intended for use with 4 ohm speakers will try to explain this sensibly rather than with a bunch of hocus pocus Most car audio systems work with 4 ohm speakers and most in home equipment uses 8 ohm speakers While watts is watts Ohm s Law defines the relationship between voltage resis tance or in this case impedance and current To put 22 watts into a 4 ohm speaker requires less voltage but more current than putting 22 watts into 8 ohms If an amplifier is designed for a 4 ohm load and you use an 8 ohm load instead the result will be that the ampli fier works just fine but it cannot put out its full rated power Typically it will deliv er just over half the rated power I ll describe ratings further on This does not harm the amplifier in any way it s rather like driving a car at 50 mph when its top speed is 95 mph Going the other way is a different Story If an amp is designed for an 8 ohm load and you use a 4 ohm load instead the results could be fatal to the amp Because it has half the load impedance it will attempt to deliver twice as much power as it should typ ically by trying to pro
74. heralds a breakthrough in rechargeable batteries Lithium intercalation materials donate or accept lithium ions without dissolv ing or depositing lithium or any other solid Carbon s low cost and high charge density Comparable to lithium metal has elevated it to the prime lithium intercalation anode material That material is produced from a commercially available low cost polymer precursor which is manufactured through an oxida tive stabilization process followed by heating to 1100 C producing a fine powder whose particle size averages 5 microns For battery manufacturing the powder can be either bound into conventional porous electrodes for use in cells with liquid electrolytes or it can be processed into polymer composite electrodes for solid polymer elec trolyte cells Computers They re taking control Ir s sneaky but we let them play a game while we re really teaching them to read Ms Rose it is very obvious to me that you are not IBM compatible All my students read two grades above level Is it me or the software I dow t see how a child that does his family s income taxes can be failing at computer math I like working with the computer It s so much easier to erase than the blackboard I may not be a great wizard but look at what can do with a computer Or are they RESEARCHERS INCH UP ON THE ULTIMATE ELECTRONIC RULER S cie
75. inch drivers and tuned ported enclosures allow the speakers to produce sound that is consistently clear full and rich Price 259 pair including mounting hardware Plans e potas setae e Easy to Build Kits eea e Laser 250KV Tesla Coil lt ATTENTION Experimenters amp Researchers a Ray Gun 10 14 of Explosive I Anti Gravity Rail amp Coil Guns Mass Warping aud andheld Bolts of Lightning Levitation Research Exploding Water Propulsion Drivers battery operated f Transmit Wireless Energy Lattice Snapping EMP etc Loss less Energy ena with triggered spark switch Adjustable 500 to 3KV out I Produces an intense on Motors Jburst of light capable of buming holes Anaa Charges up to 25KJ dailies Output _ A LAGUN2 Plans ssoccscsssosssesnessenereneee 20 00 Strange and bizarre HEP1 Plans i 15 00 s ae LAGUN2K Kit Plans Price on Req pyrotechnical effects HEP1K KitPlans with 500J 399 50 Esga E pe ther experiments shown n detail HEP10 Lab Assembled to your spec s HEP10 P i Visible Beam Gas Lasers ae f we scienceprojet 15 00 Write call or fax for price amp delivery _ shown connected to polen tial rail gun system ore degree temp equiv Illuminates iow f BTC3K KitPlans with coil 299 50 maa ee Vy level clouds BTC30 Assbid Ready to Use 399 50 Solid State SU
76. like TRANSMITTER Small but mighty it fits any The AUTO CALL enables you to electronically store a 20 3 where Phone line powered second message of your choice EIR AME EE never needs batteries Your call sign or call CQ for instance and send it with the A Transmits both sides of a push of a button Change your message as Often as you like phone conversation loud and clear wireless to Your message is stored in on board non volatile memory any FM radio at great distances Variable tunes cells providing zero power data storage This is a high from 70MHz to 130MHz FM You can also use it quality voice recording and playback unit as a speaker phone SIZE 1 25 x 6 RX 1 KIT 49 95 KIT 12 95 RX 1C SIZE 1 H x 2 4 W x 3 8 D CABINET 12 95 WIRELESS 2 ia FM MICROPHONE Small but mighty this little jewel will out perform most fea units many times its price Ba It really stomps out a sig nal The WM 2 kit is a buffered wireless mike that operates from 80MHz to 120MHz FM the frequency of any broadcast FM radio includes a mini electrat mike 6 to 12v DC SIZE 1 25 x 1 WM 2 KIT 14 95 TA Sweet 16 tone decoder operates great over phone lines radios or scanners e 16 TTL Level Outputs DTMF Decoder Decodes 16 different touch tones using the phone radios or scanners es One relay amp driver circuit on board ge Oe 9v battery powered Size 2 3
77. manufactured units Interchangeable parts are very common An exact replacement part may be available only a few minutes away from you even though the manufacturer supplier is out of stock You may be able to cannibalize scrap units at no cost The ISCET VCR Cross Reference is pre punched for standard loose leaf binding 38 00 plus 3 00 for shipping for each Reference Claggk Inc VCR CROSS REFERENCE OFFER P O Box 4099 Farmingdale New York 11735 0793 Name Business Address City State Zip Phone Enclose 38 00 tor the Fifth Edition of the ISCET VCR Cross Reference and 3 00 for shipping for each Reterence The total amount of my order is Check enclosed do not send cash or please charge my credit card O Visa O MasterCard Exp Date 7 Card No Signature New York State residents must add a pplicable local or International Money Order CB02 Introducing the Freed Eisemann NR 5 ast issue we discussed the development of the tuned radio frequency or TRF circuit and its appli cation in the ubiquitous three dialer radio so common during most of the 1920s This month we ll look in more detail at one particular three dialer the Freed Eisemann Model NR 5 In future issues we ll carefully check out an example of one of these radios and ilocol 3 5 lation But the elegant method was a circuit trick introduced by L A Hazel
78. not intended to condone excessive speeding For that reason within the first year the manufac turer will pay tickets where the speed limit was not exceeded by more than 30 or 15 miles per hour whichever is less Double protection from speed traps If the Phazer sounds good but you prefer to be notified when you are in range of a police radar the Phantom is for you The Phantom combines the Phazer including the Ticket Rebate Program with a radar detector It s legal _in every state except Minnesota Oklahoma Virginia and Wash ington D C Ask your representative for more details Risk free Thanks to Rocky Mountain Radar speed traps don t make my heart skip a beat anymore Try the Phazer or the Phantom your self They re both backed by our risk free trial and three year manufacturer s warranty If you re not satisfied return them within 90 days for a full No Questions Asked refund The PhaZ raic mea gece 199 14 S amp H The Phantom 349 18 S amp H Please mention promotional code 1906 10811 For fastest service call toll free 24 hours a day 800 399 7863 aij z SS m comtbradindustries 2820 Waterford Lake Drive Suite 102 Midtothian VA 23113 s9 u01 9943 Jeindod Z664 ANF N July 1997 Popular Electronics fo CATALOG SUPERMARKET Top Secret Consumertronics This eye popping catalog features 200 excit ing and controversial Hi Tech Su
79. of the fone decoder is con nected to any one of the 16 avail able tone generator outputs Now connect the tone decoder s input to each of the other tone generator outputs one at a time and verify that a different numerical charac ter is displayed for each output Refer to the table that is part of Fig 2 if necessary A test harness like the one shown here comprised of a male DB 25 connector a length of ribbon cable and 17 miniature alligator clips 16 red and one black is used to feed individual tone signals to several different conductors simultaneously If one character is continually displayed regardless of which tone generator output is selected check transistor Q1 of the tone decoder for it s proper operation If the LED dis play fails to operate at all then check transistors Q3 and Q2 fol lowed by IC2 in that order for prop er operation After the unit is operating cor rectly it s time to prepare the enclo sure that will house the unit Before permanently installing the printed circuit board into the enclosure it might be necessary to increase the overall height of DISP1 by piacing an additional IC socket between DISP and the board mounted socket ie insert an empty socket into the board mounted socket and then install DISP1 into this socket That will make the display easier to see once the unit is assembled A suitable Ni Cd battery pack can be assembled from individual tabbed AA
80. on mod els with open loop oxidation cota lyst systems As required for certifica tion the device reduces two of the three measured emissions non methane hydrocarbons NMHC carbon monoxide CO and nitrous oxides NO by at least 20 with out increasing the third emission gas An extensive test program showed the system actually does much better The testing was done on thirteenl975 80 American and imported vehicles both cars and pickups with 111 000 to 387 000 kilometers 68 800 to 240 000 miles on their odometers Compared to the baseline measurements taken after the vehicles had received mainte nance but before the retrofit sys tem was installed the average emissions for the 13 vehicles was reduced by 72 for NMHC 64 for CO and 62 for NO see Fig 2 with the installation of the device Maintenance included oil and filter A an ae aa ey sg Sy ak he z B a ee ka ag on GTR Ea hy SB ON In the LeanPower system air is supplied via the intake tube at the bottom of the device The carburetor plate at the left fits between the carburetor and intake mani fold The black box contains the Lean 2000 signal processor changes plus tune ups and repairs to the fuel and ignition systems that are normally performed to pass emission tests Six of the vehicles were driven 48 000 kilometers in long term road testing The aver age reductions after 48 000 kilome ters was still 51 for NMHC 22
81. pro gram on the disk did have all the functions needed right here in this demo program At the basic level really needed only two functions First needed a pin to go high or low following a time interval this would key the transmitter via the push to talk line Second once the PTT was activated needed to send some tones to the audio input of the transmitter Somehow the demo program was making a beep and a beep is fairly close to a Morse code tone had no use at all for the analog inputs or even reading whether a single pin was high or low but apparently the demo program could do that too The only problem now was how to modify the demo program to make it do what wanted Yikes It s Assembly Language dumped the supplied disk onto my hard drive and reviewed the files There was a file called DEMO ASM that looked like a good choice highlighted the file and chose VIEW At first thought l ad looked at the wrong file You know like when you print out an EXE file by mistake all gibberish rbase equ 1000 SOOFF rbase 04 STACK portb equ equ As looked closer noticed that things were lined up a littl too nicely for trash wait a minute I d seen this stuff before assembly language Yikes That was a long time ago and it was scary then Editor s note For the non guru s ouf there software is also supplied fo program the 68HCI1 in C or BASIC language As scr
82. programmable 240x64 Graphic Display Module grammable Outputs Pulse Width Upload your BMP GIF Image Files at 9600 19200 38400 115200 Baud Complete Support for 30x8 and 40x8 Text Documenta tion and QBasic Software Gets You Running FASTH Counts as 2 Devices on the NCD RS 232 Network use up to 8 GDSPs on a a Digital Tachometer Optoisolated RS 232 Networkable Easy to Pro gram Requires 12 ASB booster NCD AD8 Kit 34 Assembled 49 7 Mod Period Measurement Use as Popular Electronics July 997 D JN ASO 83eJadQ 03 peuinbay eue sauiAA 2 AlUO includes Drivers in QBasic Mac amp Amiga Software 4Udq HSE CEC Sy sibury e wuy sasasta National Control Devices Contact Ryan Sheldon Phone 404 244 2432 FAX 417 646 8302 Include 5 Shipping Visa MC Accepted NCD 80x 384 Osceola MO 64776 High Power DC Motor Con trollen 9 12 Volt Operation Forward Reverse 64 Speeds With Infrared Receiver Hexfet H Bridge Driver stage NCD M1 Kit 89 Asm 149 On Line Catalog Single Serial Line Many Price Available 99 299 for Motors Up to 4 Arps PMB SL by ppe TUN M PRENS ia Audio Video Switcher cgi In puts 2 Outputs Infrared Controllab e Routes Any In put to Any Output 12 18 volt DC operation For Low Power Line Level Signal Switching Routeing of Most Analog Sig nals AVS8 Kit 89 Asm 139 We nfrared Transceiver for Remote RS 232 Communication with 16 IR Cont
83. s21u01499 3 JeINdOd Z661 Anf 107 Popular Electronics July 1997 g ae Hands on detailed troubleshooting instructions a Electronics Repair How to primer for test equipment oscilloscopes bat Manual frequency counters video analyzers etc e Schematic diagrams Trouble analysis flowcharts e Preventive maintenance techniques Safety precaution checklists Comprehensive replacement parts list e Directory of manufacturers Leading Manufacturers Represented Emerson Nintendo RCA Technics Hitachi e Panasonic e Sanyo Toshiba e IBM Pioneer Sharp Zenith NEC e Quasar Sony and others It s easy fast and rewarding to repair it yourself with the Electronics Repair Manual v Dozens of Fix It Yourself Projects for L CD Players L Amplifiers LJ VCRs LJ Car Radios LJ Televisions L Home Appliances LJ Camcorders L AM FM Tuners L Computer Equipment C Thermostats LJ Fax Machines and more L Telephones Keep Your Skills Up to Date The Electronics Repair Manual and the Modern Manual Electronics Manual will be a valuable reference for years to come Supplements each containing over 125 pages add new repair projects valuable insights into new technologies diagnostic and repair techniques electronics projects and more schematic diagrams into your manual Just 35 each for Electronics Repair and 49 50 each for Modern Electroni
84. shoppers but better for con Sumers in general prices are coming down and resolutions are getting better all the time Less obvious differences abound in the capacity and type of memory storage used in different models No standard has been agreed upon and three incompatible tech nologies Compact Flash CF Mini ature Card and Solid State Floppy Disk Card SSFDC are now competing All three use tiny memory cards that can be plugged into special PCMCIA adapters The Compact Flash manufactured by San Disk and backed by Kodak currently seems to have the edge Not much larger than a postage stamp the Compact Flash card is compatible with an adapter with Type I II PC ATA devices You ll want to buy a camera with suffi cient storage capacity to keep up with your picture shooting style Keep in mind that digital photography encourages you to take lots and lots of photos it doesn t cost anything to develop them and if you don t like one or a dozen you can easi ly erase it and try for a better shot Picture capacity varies widely from camera to Camera and the numbers don t tell the whole story Some offer two or even three resolution levels the higher the resolution the fewer pictures you can store Low end cameras have only a limited amount of built in memory use it up and you ll have to erase some pictures or download them to a computer before you can take any more To squeeze in as many photos as po
85. signal with a near perfect 50 duty cycle SEE TEXT Fig 6 This 4047 Multivibrator IC circuit results in three square wave output wave forms this circuit can do it The fundamental output signal is fine for many applica tions but it is not always a 50 duty cycle waveform If you run the oscilla tor at twice the desired frequency and take the signal at either pin 10 or 11 the output will be a perfect square wave The oscillator s frequency is deter mined by the values of C1 and R1 The value for resistor R1 can be any value from a few thousand ohms to over 1 megohm The capacitor can be just about any good quality low leakage unit that is 100 pF or larger Good low leakage electrolytic capacitors are nec essary for very low frequency applica tions Capacitor values for C1 can be selected from the following list choose a value which sets up your circuit to oscillate over the desired frequency range 1 uF less than 1 Hz to 10 Hz 0 1 uF 10 Hz to 1 kHz and 0 01 uF 100 Hz to gt 10 kHz LED Flasher Oscillator You have probably seen our next choice of IC operating in various circuit applications which make LEDs flash on and off The popular LM3909 LED Fiasher Oscillator IC has been doing this for years This versatile IC can Continued on page 79 Fig 7 The popular LM3909 LED Flasher Oscillator IC designed to function as a simple audio oscillator pemes PARTS ST T ae FIG i 7
86. spondence you have to read finishing a stimu lating book and retaining facts and details FOR FASTER SHIPMENT CALL 1 800 729 7323 OR FAX 1 609 273 7766 more clearly and with greater accuracy than ever before Listen and learn at your own pace This is a practical easy to learn pro gram that will work for you no matter how slow a reader you think you are now The Speed Learning Program is scientifically planned to get you started quickly to help you in spare minutes a day It brings you a teacher on cassettes who guides you instructs and encourages explaining material as you read Interesting items taken from Time Magazine Business Week Wall Street Journal Money Reader s Digest N Y Times and many others make the program stimulating easy and fun and so much more effective Executives students professional people men and women in all walks of life from 15 to 70 have benefitted from this program Speed Learning is a fully accredited course costing only 1 4 the price of less ef fective speed reading classroom courses Now you can examine the same easy practical and proven methods at home in your spare time without risking a penny Examine Speed Learning RISK FREE for 15 days You will be thrilled at how quickly this program will begin to develop new thinking and reading skills After listening to just one cassette and reading the preface you will quickly see how you can achieve i
87. sports program ming Subsequent chapters describe Web radio transmissions from the United States Canada Latin America Europe Africa Asia and the Pacific 1997 Passport to Web Radio costs 9 95 and is published by International Broadcasting Services Ltd Box 300 Penns Park PA 18943 Tel 215 794 8252 Fax 215 794 3396 Web http www ph ssport com a RCLE 96 ON FREE INFORMATION CARD soiu0djoa y Jeindog 2664 ANF J 3 Popular Electronics July 1997 j pe NEW PRODUCTS Continued from page 19 that can be read from as far away as 20 feet The device has a 2 00 volt to 6 volt input voltage range The DVM uses an advanced A D converter an ultra stable reference and metal film resis tors to achieve 0 01 volt accuracy It never requires adjustment or recalibra tion and it is reverse polarity input pro tected over its full rated operating range The DMS 20PC 3 DCM DVM costs 45 each in single quantities 38 in hundreds For further information con tact Datel Inc 11 Cabot Blvd Mans field MA 02048 Tel 508 339 3000 or 1 800 322 2765 Fax 508 339 6356 CIRCLE 82 ON FREE INFORMATION CARD Pc Card Modems Three models of high speed state of the art data fax PC Card modems are available from Logicode Tech nology The 33 6 bps modems include a basic economy data fax modem one with voice mail and one with speaker phone capabilities Designed for lap tops notebooks an
88. t happens a LNBs Programming you want at a price a a re Ali kinds you can afford to pay eat gt i to heat up your piefure Whether you re considering your first Bor vp ts satellite TV entertainment system or or C a amp DBS s looking for n upgrade to vour Progra mming current system Skyvision provides Save 30 50 with Skypac the best in hardware technical Support support convenience Customers enjoy toll free technical heip low cost and service 1048 Frontier Dave fergus Falls MN 565 37 a pari Se ome eee tradesarks F 21 8 739 4879 int l 21 8 739 5231 aly l ee LE a Skyvision so1uosoa y ieiNdog 2661 ANF www skyvision com oO PE ELECTRONICS SSS CABI Converters amp Descramblers Compatible with Jerrold Scientific Atlanta Pioneer Oak amp Hamlin LICENSED aN nen 6 MONTH GUARANTEE pragai Tet Ve LOWEST PRICES poren i Volume Control amp Parental Lockout Available Greenleaf Electronics te PASAT 1 800 742 2567 Earn up to NO ILLINOIS SALES pan l wi in nout iP a A o Sea yr lt 4 Q s euy z Learn at home in spare time No previous experience needed No costly school No commuting to class The Original Home Study course prepares you for the FCC Commercial Radio telephone License This valuablelicenseis your professional ticket to thousands of exciting jobs in Communications Radi
89. tance education programs leading to the following accredited degrees 1 the B S E T with Major Emphasis in Electronics 2 The B S E T with Major Emphasis in Computers 3 The B S C S the Bachelor of Science in Computer Science The B S E T programs now include Electronics Workbench Professional 5 0 An important part of being prepared to move up is holding the right college degree and the absolutely necessary part is knowing your field Grantham can help you both ways to learn more and to earn your degree in the process Write or phone for our free catalog Toll free 1 800 955 2527 or see mailing address below e Accredited by the Accrediting Commission of the Distance Education and Training Council GRANTHAM College of Engineering Grantham College Road Slidell LA 70460 a ls bt Werar Gsitarzes te C L K lt e4 For jality Electronic Components internet Acct 3 pa ho fsa day 7 days a week lt Online Ordering amp stock status SEESEGRe i o Fast efficient parts search Tiik e No minimum order Same Day Shinment on orders entered by 5 00pm central M F www digikey com cx Popular Electronics July 1997 SPEAKER CLARIFICATION plan to build Gary Clifton s 22 Watt Amplifier project which was fea tured in the February 1997 issue of Popular Electronics Before begin however have one question Would
90. the instructions provided inside and move onto the next from Get Photo right through to instructions for saving and printing your finished product You might be tempted to jump right into the creative categories but it s a good idea to start off with Touch Up There you can select Size Orientation to straighten out the image or crop it to bet ter focus in on the subject Quality to adjust the overall lighting and colors and Remove Red Eye to restore the subject s eye color Once you ve fixed any basic problems with the original you can start to put your own persona stamp on the image The Transform category offers dozens of different options arranged into five sub sections Collage Fun Art Cool and Internet In the Collage folder for instance you can create Funny Money by replacing Ben Franklin on a 100 bill with your face or your cat s face or you can opt to disguise a subject s face by adding glasses a moustache or a hat Select Change Background to put your subject in front of a famous landmark or have him float in outer Space choosing from Adobe s library of backgrounds or Uy sod pang LO elh ee pense WE Betios Cr Minny using one of your own Finally Body Switch allows you to swap between pho tos to put your cat s head on your dog s body for instance Or you can replace any subject s body with one of Adobe s selec tion of famous bodies Options within the Fun fol
91. trick to it except knowing what you are doing In a unique 106 page book you can become expert in winding RF IF audio and power coils chokes and trans formers Practically every type of coil is dis cussed and necessary calculations are given with the mathematical data simplified for use by anyone Get your copy today a me LES a CC e e ail coupon to I Electronics Technology Today Inc i P O Box 240 e Massapequa Park NY 11762 0240 i Please send me my copy of Coil Design and Construction Manual i 160 enclose a check or money order for 8 95 to cover the book s cost and shipping and handling expenses NY state resi dents must add local sales tax 1 i Address a E City Name State ZN l All orders must be paid in U S funds only Sorry no orders ac i cepted outside of USA and Canada Please allow 6 8 weeks for de livery OW a am m ee ee ee ee e Dualtone Generation Internal External FSK AT LAST DC 20 MHz SYNTHESIZED PERFORMANCE FOR ONLY 795 e Burst e DC 20 MHz 1 Hz resolution DC offset Linear Log Sweep AM FM t _ X Ex t Interna Interna e Interna e Intern DTMF Generation DTMF Detection Power Level Measmt PM SSB ema al OSCILLOSCOPES from 1 69 ATC O Scope uses printer port to turn PC AT into Digital Storage Oscilloscope Spectrum Analyzer Freq Counter Logger DVM D
92. using a computer you can t take full advantage of digital photography About all it has to offer camera shy users is freedom from having to load film which actually throws many amateur photographers for a loop If you have a good rapport with your Mac or PC enjoy taking photos and have any artistic bent at all you ll have a blast using the D 200L and its supplied soft ware In no time you ll be making digital photo albums flyers and greeting cards or including photos on your Web page The D 200L is easy to use and offers a few features that have not yet become standard fare on consumer digital cam eras Our only major complaint is that it does not accept any type of photo storage memory card If you re at a wedding or on vacation and don t have access to a laptop or desktop PC you can soon find yourself running out of film It doesn t take much time to snap the maximum 20 high quality photos especially when the camera is so much fun to use Olympus has introduced a big broth er to the D 200L The D 300L can store ten extra high quality photos for a total of 30 or 120 in standard mode And high quality is not an exaggeration In HQ mode the resolution is 1024 X768 pixels Actually standard quality is not bad either at 512 x 384 pixels it s still better than what passes for high res on some of the lowest priced digital cameras out there The D 300L whose suggested retail pric
93. ve etched vour printed circuit care fully inspect it for faults such as incomplete traces and copper bridges between traces Power for the tone generator is supplied by an ordinary 9 volt tran sistor radio battery The source volt age is regulated to 5 volts by ICS a 78L05 100 mA 5 volt regulator Capacitors C1 C3 filter and stabi lize the supply voltage LEDI serves as the project s power on indicator and is flashed on and off through IC1 c which is also driven by the 12 Hz clock signal Tone Decoder Description Figure 2 shows the schematic diagram for the second half of the DTMF Wire Tracer the tone decoder which is used to detect and identify sig nals produced by the tone genera tor Tone bursts from the tone gen erator are applied to the wires being sorted Test leads connected to J2 and J3 black and red bind ing post for the ground and signal leads respectively are used to route the signal to the tone decoder Resistor Rt provides a suit able load impedance to the con ductor being tested it also helps to counteract any mutual coupling effects between conductors which are often present in long multicon ductor cables The tone bursts are AC coupled via Cl which passes DIMF tones while block ing DC voltages to ICI an SSI 204 DTMF de coder The decoder ICI coupled with a 3 58 MHz colorburst crystal XTALT decodes all 16 DIMF tone bursts output by the tone generator and in tur
94. visual stimuli induces hypnotic from hoverboards to pens i J trances HYP2K Kit with Book 39 95 MINMAX4 While they last u 19 50 EH2 Hypnosis Book amp Plans 14 95 LTACTIC AE ELEC RON ew 4 Long Range Parabolic Mic Phasor Sonic c Blast Pistol MESA canheara Vltra Ear distn Rids areas of unwanted N nen 4 Trains and conditions wiid and domestic animals Great for bams attics cellars gardens f Module Ready to use for many projects fo your specs Call or fax us with your requirements oye X Cybernetic Ear F Enhances normal J hearing 3 4 times Telephone g a see te Seb wis Reales Aco DA Q Hang many ce ee ee iter distant sounds PMS PIARS cnc 8 00 Ie PPPIK Kit Plans 39 50 Ready to Use Use tone phone anywher in the word to PM5K Kit Plans 149 50 Shocker ae Hf e Monitor your premises avoid break ins er CYBEREAR 19 95 once donnie Cais fone kegs Optional Wireless Retrofit iain zi E captured sounds to an FM radio WMSK Kit for Wireless opin pc mn a ata ace a 3 Mi Telephone Xmitter Tune able 80 130 Mhz Undetectable e Only transmits when phone is used VWPM7K Kit Plans S 99 90 orev yeeros e Control up to 8 appliances in your home Re direct costly toll calls from pay phones TELCON3 Plans credit to ni 10
95. with training course e Large 3 3 4 LCD Display Model FO 30K PT 223K 4 5 Phone kit with e Menu Driven ie Triple Display _ 4 5 95 RS 232 Interface e True RMS 9 Basic Functions including cap amp freq Auto Power Off Easy to use Model AM FM 108K Transistor Radio Kit a m with training course amp Transistor 5 29 95 WE WILL NOT BE UNDERSOLD C amp S SALES INC 15 Paes l 150 W CARPENTER AVENUE UPS SHIPPING 48 STATES 5 WHEELING IL 60090 FULL FACTORY WARRANTY OTHERS CALL FOR DETAILS FAX 847 541 9904 847 541 0710 IL Residents add 8 Sales Tax http www elenco com cs_sales CIRCLE 32 ON FREE INFORMATION CARD M 1005K Compact Multimeter Kit 4 9 6 Functions PRICES SUBJECT TO CHANGE WITHOUT NOTICE E RIOT RIO AO APES V FREEPROBES OSCILLOSCOPES gurr SCOPES Lowest Prices of the Year r rien it B amp K Precision Scopes 60MHz ANALOG WITH DIGITAL STORAGE Cursors and readouts Model 2560 fs 22 port 20MS s eval time sampling Quality Scopes by Elenco I T Cr ee l in ai 7 5 a SA od 1GHz equivalent tme Pe sampling at 0 1us div k IE Prints via RS 232 port i to any HP GL pioiter ae 1995 20MHz ANALOG WITH DIGITAL STORAGE 20MH iog ba idth Model 2522A omS s sampling vate 2K
96. 0 ohm ae eRA3 2200 o0hm _A4 20 000 chm potentiometer ADDITIONAL PARTS AND MATERIALS C1 NES66 Radio Shack ASU 14992529 or equivalent Voltage Controlled Oscillator Our first oscillator see Fig 1 uses a NE566 IC in a basic function generator Circuit that produces square wave and triangle wave outputs The NE566 IC is a linear Voltage Controlled Oscillator VCO that uses external resistors and a capacitor combination to cover an approximate frequency range between 1 Hz to 1 MHz The resistance values of R3 and R4 should be between 2 000 eo OO ee w ge s A t Since the actual value of an electrolytic capacitor can vary greatly from its marked value selecting a capacitor will probably be necessary to obtain the desired frequency range C1 can be as small as a few hundred picofarads to operate near the maximum frequency range Experimenting with different capacitor values will help in determining the needed value for a given frequency range A square waveform is available at pin 3 and a triangle waveform at pin 4 The NE566 oscillator can also be used as a FM signal source by cou pling an external AC modulating signal to pin 5 Phase Locked Loop Our next IC oscillator see Fig 2 uses a 567 Phase Locked Loop PLL Tone Decoder IC in an encoding circuit arrangement The input to the PLL on pin 3 ts tied to ground to disable the decode function of the IC and to help stabilize the oscillator The d
97. 0 t0 BOKCOM PO Bex Gok Can Gity FL CALL for a free electronics catalog or visit our PO Bon Petose Ge ee x 280298 Dallas 7 er line 800 276 2206 COMPONENTS WE HAVE ITA LL STEPPER IC EDE1200 is perfect for robotics etc E LAB DIGITAL ENGINEERING INC 712 S urvel I F nce PLANS KITS SCHEM ATICS 944 5344 www netins net showcase elab TRANSISTOR Data Tables Given are the basic electronic parameters for the worlds popular tran sistors in one volume A must for servicemen hobbyists and engineers Order Transistor Data Tables BP401 for oniy 9 95 e includes shi ping from ELECTRONIC TECHNOLOGY TODAY C PO Box 240 Massapequa Park NY 11762 0240 USA and Canda only US funds CRYSTAL Set Handbook Visit antiquity by building the radios your grandfather built Assem ble a Quaker Oats rig wind coils that work and make it look like the 1920 s Only 10 95 plus 4 00 for shipping and handling C K INC PO Box Farmingdale NY 11735 US funds only USA and Canada no foreign orders HEATH COMPANY is selling photocopies of most Heathkit manuals Only authorized source for copytight manuais Phone 616 925 5899 8 4 Infinity Transmitters FM Wireless Transmitter Kits Vehicle Tracking Systems Bug Detectors Caller D Telephone Register with Printer Long play Recorders Wired Mikes Shotgun Mikes Telephone Recording Adapters Alcohol Testers Drug Testers Telephone Scramblers Hi
98. 0 x vide coordinate reference frames when determining the positions of both the probe and specimen Movements relative to the metrolo gy box are tracked and measured with laser based instruments called interferometers The system is capa ble of measuring movements as small as 0 05 nanometers less than the diameter of an atom Until recently the machine has been limited to measuring only a small part of its full range While the team continues to characterize pre cision and accuracy performance NIST can at this point finally see the whole field There are some mea surement uncertainties that remain said metrologist John Kramar the current project leader but we can now essentially measure specimens and map out surfaces over the full 50 x 50 millimeter range Measurement with M may be more accurate but it is not faster It takes a long time said Kramar orders of magnitude longer than typical measurements from the measuring microscopes like those used in semiconductor manufactur ing process control Typically for a 5x5 micrometer image with the raster scan lines spaced 50 nanome ters apart the scan time is 30 min utes For example in a comparison of different methods for measuring line width on integrated circuits M operated for 40 straight hours per forming roughly one million separate measurements of an area centered 100 pm 10 um human im cell s hair EA nucleus
99. 00 TELCON3K Plans Kit 99 50 TELCON30 Read to Use 149 50 m an A TEE TTT ESE TO 3 Mi Voice Transmitter Ultra Sensitive Mike e Crystal Clear Tunes 80 130 MHz FMV1K Kit Plans Force Field Syer Amn 2950 Vehide 7 Ea e Access ongoing calis longwinded kids Shoots flaming ball two shot capacity Great for special effects and remote fire starting CAUTION REQUIRED sue Plans SANRIO poi si 00 and electrify objects Great payback for i those wiseguys LSHKIK Easy to Assemble Kit 19 50 Electric Charge Gun d Life is Precious PROTECT IT Y Stuns amp immobilizes attackers f Telephone taping S stem Tapes Phone Conversation xtends d Tape X4 Check Local Laws before A b _TAP30X_Read to Use as 84 50 3 Mi Tracker Transmitter 4 Tunable Output High Quality IR Night Vision Scope with IR illuminator D10 Seater OUSE asniensis Drop In 1 imi Telephone Transmitter laws for legality More knockdown power than most handguns No i Uses FM Radio Ry Easily tunable over FM radio Never needs Excellent Signal Beacon Fo battery DROPIN Kit Plans E 19 95 permanent injury ID coded HODIK_KitPlans peseme 39 50 pen Se ECG1 Data Creditable to purch 10 00 ECG10 Charge Gun Ready to Use
100. 00L digital camera and PhotoDeluxe software as well as a differ ent type of digital photography with the Snappy Video SnapShot Image ine That MODEL D 200L DIGITAL CAMERA From Olympus America Inc Two Corporate Center Drive Melville NY 11747 3157 Tel 1 800 622 6372 Web http www olympus com digi tal Price 599 One of the main reasons that digital cameras are not likely to replace their film based counterparts any time soon is that they hold very little appeal for any one who does not know how to use a computer After all you can t take advan tage of all the neat things that a digital camera does without linking it to a laptop or PC And people who don t even want to know how to use a computer or surf the Net are even less likely to want to switch from their trusty old 35mm cameras Olympus is trying hard not to scare off the large segment of our population that feels overwhelmed by computer technol ogy It s D 200L digital camera is designed to look and feel like a regular camera It is also supposed to be so easy and familiar to use that consumers intu itively know just how it works It s a digital camera not a computer in a cam era bag the press material proudly states The D 200L does look quite a bit like a regular camera Attractively styled in black and gray the pocket sized 5 7 X 2 81 8 inches camera weighs 10 4 ounces without its one lithium and four AA alkaline NiCd
101. 0Hz semiconductor junction in mV test cur rent of 1 5mA Max OhFE Test Measures transistor hFE Maximum Allowable input 750V rms Response Average Responding Cali brated In rms of a Sine Wave CAT NO DESCRIPTION PRICE 9300G Rugged High Quality DMM with Rubber Boot 19 00 a Switchable Scope Probe Sets Selectable X1 Ref X10 These high quality scope probe sets are for oscillo scopes up to 60MHz model HP 9060 or SOMHz mode HP9 150 Both setsinclude a handy storage pouch and include an IC test hook adapter for the probe The BNC connector rotates to avoid cabie tangle or kink Cable length is 1 4 meters PRICE EACH CATNO DESCRIPTION l 10 100 HP 9060 Scope Probe Set DC 60MHz 16 49 14 49 11 58 HP 9150 Scope Probe SetDC 150MHz 24 95 21 95 Etching Chemicals ferric Chloride Adry concentrate that mixes with waterto make pint of etchant enough to etch 400 sq inches 18 62 SEE OUR ON LINE CATALOG AT Positive Photo Resist Pre Sensifized Printed Circuit Boards These pre sensitized printed circuit boards are ideal for small produc tion runs They provide high resolu tion and excellent line width control High sensitive positive resist coated on loz copperalaloks youto go direct from your computer plot or art work layout No need to reverse art Single Sided loz Copper Foll on Paper Phenoli Substrate PRICE EACH 10 50 CAT NO DESCRIPTION PPIOI 100mmx 150mm 3
102. 1 to 20 00 4 00 50 01 and above 8 50 Dg 20 01 to 30 00 5 00 ae Sorry no orders accepted outside of USA and I Canada All payments must be in U S funds only F _ Number of books ordered 2 f Total price of books 00 ce O Shipping see chart vo l LaL 0 A E E E ee Sales Tax NYS onlly cc ccecse 5 Total enclosed oo eee 2 i Name Address City State ZIP_ ee allow 6 8 weeks for delivery ELECTRONICS 5 95 If you are looking into launching an exciting hobby activity this text provides minimum es sentials for the builder and 30 easy to build fun Projects every experi menter should toy with Printed circuit board designs are included to give your project a pro TEE 5 95 The text contains a good ly number of practical music projects most often requested by musicians All the projects are rela tively low in cost to build i and all use standard readily available compo nents that you can buy The project categories LETTERS continued from page 6 messages do they have to get a court s permission to do so M A C Athens GA The Communications Act of 1934 authorized rules and regulations including provisions for privacy to be established cannot give you an expert legal opinion however believe the fol lowing to be an excellent guideline You can listen to or view i e TV anything that you can re
103. 100 mA when the display is active Battery recharging is accomplished by connecting jack J1 to a suitable 12 volt DC source The value of R9 determines the charge rate normally 9 of rated battery capacity for a 14 hour charge and can be found using Ohms law Resistor R is automati cally bypassed via the switching contacts of J1 whenever a plug is not inserted in Jt LED1 serves as the 31u01499 3 Jeindog 7661 ANF io Popular Electronics July 1997 D PART LIST FOR THE TONE DECODER SEMICONDUCTORS IC 1 SS1204 CD22204 or similar DTMF decoder integrated circuit IC2 CD4538 or similar Dual mono stable multivibrator integrated circuit IC3 LM7805 or similar 5 volt 1 amp voltage regulator integrated circuit Q1 Q2 2N3904 or similar NPN general purpose switching transistor Q3 2N3906 or similar PNP general purpose switching transistor D1 1N400 or similar 1 amp 50 PIV silicon diode DISP TIL311 Hybrid dot matrix led display with built in hex decoder driver LED1I Red light emitting diode in chrome holder R S 276 068 or similar RESISTORS All fixed resistors are watt 5 units unless otherwise noted R1 10 000 ohms R2 1000 000 ohms R3 R5 4700 ohms R6 R7 RIO 1000 ohms R8 amp 100 000 ohms R9 See text CAPACITORS C1 0 01 pF ceramic disc C2 4 7 uF 25 WVDC electrolytic C3 10 pF 25 WVDC electrolytic C4 330 uF 10 WVDC electrolyt
104. 12 VISA MC Fax 508 371 7129 CIRCUIT CIRCUS Continued from page 70 also be used as a tone pulse genera tor The oscillator circuit in Fig 7 pro duces narrow negative output pulses which can be tuned from about 100 Hz to over 10 kHz The circuit may be used to drive a piezo transducer for high frequency audio experiments Double Balanced Mixer Our last oscillator circuit uses a very popular and versatile NE602 Double Balanced Mixer IC complete with a built in oscillator circuit that is good up to several hundred megahertz This IC has been a real boom for the ham cir cuit builder in the front end of many receiver and transceiver Circuits But for now we are only going to look at the IC s oscillator section The oscillator in Fig 8 is configured as a Hartley circuit with inductor L1 and variable capacitor C1 setting the oper ating frequency The following nominal L1 C1 values are a good start in choos ing components for a desired center frequency for the oscillator L1 5 uH and C1 150 pF for a center frequency of 5 MHz and L1 1 5 mH and C1 50 pF E C2 z C1 f 02 1 4 TAP amp E C3 02 SEE TEXT Fig 8 The NE602 Double Balanced Mixer IC can be used as a sinusoidal RF oscillator in this configuration oa l O m PARTS LIST FIG 8 Gi Variable capacitor see text O2 C3 0 02 uF ceramic disc C4 0 1 uF ceramic dise C5 100 uF 25 WWDC electrolytic capacitor
105. 2 is used for DC blocking preventing any DC component of the output from reaching the following stage while allowing the DTMF signals to travel on to the input of IC4 which is responsible for routing individual DTMF tone to their appropriate out puts While IC3 is performing its job binary data from IC2 is fed to IC4 and is used to select appropriate output pins of IC4 ensuring that each distinct tone has its own out put terminal The 16 outputs of IC4 plus a ground wire are then con nected to individual pins of a DB 25 female connector SO1 which is not shown The generator uses a mating male DB 25 connector out a S r S m lt i E d fet r re Se SS taf J E Here is the tone decoder board mounted into its enclosure along with its rechargeable fitted with 17 leads 16 signal lines plus a ground connection each terminated in an aligator clip to feed the tone signals to the cable to be tested m T tne Soe oo power pack The power pack and binding posts J1 J3 as well as DISP1 and the on off switch S1 are mounted at various locations of the enclosure 2 3 8 INCHES Fig 3 The tone generator was assembled on a small printed circuit board measuring 2 4 bv 2 7 1 inches A template of the author 5 printed circutt board pattern is shown here full scale Note that the lavout is fairly tight with numerous traces routed between component pads So once you
106. 2 800 37 95 CSD 1225 12 12E a 0 35 62 0 180 2 500 42 135 e SOLDER SOLDER CCD Camera IR Responsive As Low As 85 e SOLDER SOLDER e This black and white monochrome CCD Cam a aa Westockhigh quality 60 40 Sn Pb 03 1 a and 63 37 031 diameter Thisis prime JIS i certified solder that we maintain as Og regular stock item It is not Left overs Rejects or Surplus and you can buy ft a from us ata fraction of the price that i you are used to Tired of Paying Inflated Prices for Solder PRICEEACH CAT NO DESCRIPTION 1 10 25 RH60 1 1 b Spool 031 60 40 6 90 S 596 9530 RH63 1 1 lb Spool 031 63 37 6 95 6 10 5 41 RH60 4 4 4 ib Spool 031 60 40 24 00 21 90 17 92 RH60 TUBE 6 02 Tube 031 60 40 9 89 79 PRICE EACH CAT NO DESCRIPTION 1 5 CA H34A PCBMounted IRCCD Camera 99 00 85 00 A34 Power Supply Regulating Kit 6 95 CIRCUIT SPECIALISTS INC SINCE _ 1971 800 811 5203 602 464 2485 602 464 5824 FAX WE ACCEPT SEE OUR ON LINE CATALOG AT Www cir com era is totally contained on a PCB 70mm __ x 46mm The lens is the tallest compo Fs nent on the board 27mm high from Bes the back of the PCB and it works srs with light as low as 0 1 lux It is IR SM uals Responsive for use in total dark ness It comes with six IR LED s on poara IT connects TO any standard monitor AUX or video input on a VCR or through a video modulator to a TV Wor
107. 25 10MHz w Cursors V 1560 100MHz Was 1790 ia p e Om JIA Was 1355 NOW 955 Save 400 NOW 1490 Save 300 Call or write for complete specs V 552 SOMHz Was 1195 V 1565 100MHz w Cursors NOW 850 Save 345 Was 1960 NOW 1595 Save 365 V 555 50MHz w Cursors P Was 1375 NOW 975 Save 400 V 252 20MHz 4 19 WE WILL NOT BE UNDERSOLD C amp S SALES INC frx 15 DAY MONEY BACK a 150 W CARPENTER AVENUE GUARANTEE SERS CALIFFOR Deo WHEELING IL 60090 FULL FACTORY WARRANTY i o FAX 847 541 9904 847 541 0710 PRICES SUEJECT TO CHANGE WITHOUT NOTICE IL Residents Add 8 Tax http www elenco com cs_sales CIRCLE 32 ON FREE INFORMATION CARD so1udsjoa 4 weindog 7661 ANF wo TETAY 275 x275 569 Street Smart Security 800 908 4737 7147 University Avenue La Mesa CA 91941 Send Fax or Call Order In Use Credit Card or Check Fax 619 462 0652 BLE BOX EXPRES CALL 1 888 561 4796 FOR ALL YOUR CABLE TV NEEDS GET THE COMPLETE PICTURE ORIGINAL EQUIPMENT TEST ACTIVATORS FILTERS 97 106 108 110 REPLACEMENTS FOR ALL SYSTEMS HAVE MAKE AND MODEL NUMBER READY GUARANTEED LOW PRICE SAME DAY SHIPPING CALL NOW 1 888 561 4796 1 YEAR WARRANTY ON ALL PRODUCTS VOID WHERE PROHIBITED Anyone implying theft will be denied assistance igital are emmen i IR aerate Dual 8 Bit T Inputs 3 Pro NEW RS 232
108. 4 x2 1 8 TT 16 KIT 34 95 This Manual contains schematics 7NA parts lists amp P C board layouts for many of the Rainbow Kits Use your A own parts to construct our kits KIT BOOK 14 95 9 95 with the purchase of any kit MICRO MINIATURE WIRELESS MIKE W SO small you could hide P this one on some real bugs f i It s the smallest we ve ever seen With it s super sensi tive mike it transmits a whisper or a room of conversation to an FM radio tunable from 88 to 108MHz FM With a proper antenna it trans mits about 1 2 mile The kit is made with sur Please add sufficient postage First lb 5 00 Canada 7 00 Additional LB Add 1 00 US FUNDS ONLY We will accept telephone orders for Visa or Mastercard MasterCard Electronic Rainbow Ind Inc face mounted parts we have already mounted f 6227 Coffman Rd Indianapolis IN 46268 these parts You install the leaded parts Power requirement 6 to 12v DC Size 35 x 9 ELECTRONIC CALL 317 291 7262 FAX 317 291 7269 MMWM5 xt 34 95 RAINBOW INTERNET www rainbowkits com CIRCLE 148 ON FREE INFORMATION CARD so1u0ioe 3 seindog 7664 ANF wo Popular Electronics July 1997 oe LEADER For Professionals Who Know The Difference Oscilloscopes Video Sync Test Generators Waveform Monitors Vectorscopes FFP ENG Instruments RF Signal Level M
109. 431 2 Locksmithing Dept 12966 expertise you need to make BIG MONEY servicing Belsaw s official diploma acknowledging your Computer Repair Dept 64557 E Small Engine Repair Dept 52844 TVs and other electronics equipment accomplishment l Gunsmithing Dept 92464 Z Woodworking Dept 43713 Send Coupon Today for GPC Programming Dept 35377 UphoBtery Dept 81382 Be Your Own Boss FREE Kit ee Obli aati on i CAVCR Repair Dept 62659 2 Saw amp Tool Sharpening Dept 21781 It s quick and easy to become an expert at home in your hagia l spare time Eam really BIG money adjusting installing Don t miss out on this once in a lifetime opportunity and repairing Satellite Dish Systems TVs Amplifiers Send in the coupon NOW Get all the facts and study f Name CD Players AM EM Tuners Home Entertainment them in the privacy of your own home There s Centers Every home every business every office in your absolutely no obligation and no salesman will call on nes O area desperately needs your expertise you So don t delay Mail the coupon today Took in over 3 200 in the past 10 s A H H Denver i T Vinyl Repair Dept 71314 l ciy State 7ip_ Your Timing Couldn t Be Better Never before and probably never again will you have a ground floor opportunity like this to get into a 487 2100 Noubted my income within 6 weeks R B Bakersfield CA ee enna a Lee ee ee ee ee l
110. 5 H 6 5 D Handy PC Field Computer from 700 In between of Laptop amp Desktop for the size Using regular CD ROM HD FD and mini keyboard Easy to carry around 10 5 W 11H 6 5 D PLC PC Industrial Computer from 900 Accessibility like PLC Programmable Logic Controller Euro Bus and PCI ees Bus for higher ae Ele reliability amp better performance 17 W 11 H 6 5 D All above 3 models accept ISA or PCI interface cards and proprietary front panel Siig ieee connecting cards I O A D D A X 10 up to 10A 220V XILLION Co http Awww xillion com 15447 Proctor Av City of Industry CA91745 Tel 818 336 1890 Fax 818 336 2061 NSI NEVADA SYSTEMS ine P O BOX 606337 BOULDER CITY NEVADA 89006 PHONES 800 785 7888 702 294 3187 FAX 702 294 3158 INTERNET WWW NVSYSTEMS COM E MAIL INFOQNVSYSTEMS COM NSI 2 4TR CLOCK 2 4 Gnz WIRELESS 4 CHANNEL VIDEO AUDIO TRANSMITTER BUILT INTO CLOCK FOR SPECIALIZED SURVEILLANCE APPLICATIONS SUCH AS KEEPING AN EYE ON THE BABY SITTER or EMPLOYEE amp RECORD THEM ON ANY STANDARD VCR 500 FOOT RANGE PLUS MORE WITH HIGH GAIN ANTENNAS BUILT IN CAMERA amp Eo MICROPHONE BUILT IN TRANSMITTER RECEIVER INCLUDED INCLUDES ANTENNAS amp AC ADAPTERS 495 00 comPLITE system H 480 H x 240 V RESOLUTION H STANDARD NTSC INPUT be 12 15 VDC OPERATION S 235 00 comput WE SPECIALIZE IN SECURITY PRODUCTS WIRELESS
111. 65 kHz Voice of Armenia noted in English at 2130 UTC with talk about Armenian history and a newscast Czech Republic 13 580 kHz R Prague broadcasts in English here at 1400 UTC with identification and news At 1430 UTC the programming language switches to Czech Hungary 5 905 kHz R Budapest has been heard here at 0225 UTC with English programs including a short wave DXing program Surinam 4 991 kHz R Apintie broadcasting from this former Dutch colony in South America is heard mornings around 1040 UTC and evenings until sign off shortly after 0400 UTC Programs usually consist of popular music and Dutch news announcements Taiwan 7 130 kHz Taipei s Voice of Free China broadcasts here at 1200 UTC in English with news ID and a program called Jade Bells and Bamboo Pipes ot Pi on E wee ha i sales tax to total US funds only Use US bank check Cross Reference NOW Find the right Part for your VCR _ aay vcr cross peferenc i l arts 1 odel Numbers eP Mo dition E fth E i went A rial x 4 op itt a oe Boy s NG EZO With the ISCET VCR CROSS REFERENCE This 119 page reference contains both model and part number cross references updated to include 1994 units VCR s are made in a few factories from which hundreds of different brand names and model numbers identity cosmetically changed iden tical and near identical
112. 741 Fax 508 664 4109 J CIRCLE 84 ON FREE INFORMATION CARD Look Carl 1 got you a new potty training program TECHNICS SL MC60 TEST RESULTS Brand Model Price 250 Features 60 41 disc jukebox type changer Single piay CD slot User programmable disc track play Automatic random play 250 tracks Custom groupings 5 Music type classifications 14 genres Wireless IR remote control Technics SL MC60 Compact Disc Changer The following test results were performed by the Advanced Product Evaluation Laboratory using the CBS CD 1 standard test disc Output voltage 0 dB 1 kHz Left 2 24 volts Right 2 21 voits Frequency response 10 Hz to 20 kHz 0 0 dB to 0 0 dB see Fig 1 Dynamic range Left 90 2 dB Right 90 3 dB Signal to noise ratio A weighted 98 8 dB Total harmonic distortion noise 0 dB Frequency THD 31 Hz 0 005 1 kHz 0 006 10 kHz 0 011 16 kHz 0 023 Wow and flutter Unmeasurable Channel separation 0 dB 1 kHz Left 87 6 dB Right 87 2 dB De emphasis error Frequency Error 1 kHz 0 02 dB 4 kHz 0 06 dB 16 kHz 0 05 dB Linearity error 1 kHz Signal level dB Error dB 0 0 10 0 1 20 0 30 0 1 39 99 0 2 49 97 0 1 59 94 0 3 70 31 0 2 80 77 0 3 Linearity error with dither 1 kHz Signal level dB Error dB 70 31 0 3 80 77 0 4 90 31 0 7 100 0 0 6 Additional data Short Access Time Track 1 to 2 1 8 second
113. 91 x5 91 2 55 1 90 1 70 PPII4 114mmx l65mm 4 6 x 6 6 2 98 245 1 98 PP1S2 150mm x 250mm 5 91 x 9 84 940 398 3 60 PPIS3S 150mmx300mm 5 91 x 11 81 615 448 4 10 PP1212 305mm x 305mm 12 x 12 NEW 12 78 1065 8 52 Single Sided loz Copper Foil on Fiberglas uleer one ACH CAT NO DESCRIPTION 1 10 50 GS101 100mmx 150mm 3 91 x5 91 3 90 2 98 260 GS114 114mm x 165mm7 4 6 x 6 6 480 349 3 20 GS 152 150mm x 250mm 5 91 x 9 84 8 69 598 578 GS153 150mm x 300mm 5 91 x 11 81 10 20 7 20 680 GSI212_ 305mm x 305mm 12 x 12 NEWI 18 88 15 73 12 59 Double Sided loz Copper Foil on Fiberglass Substrate PRICE EACH CATNO DESCRIPTION 10 50 GD101 100mm x 150mm 3 91 x5 91 5 07 3 68 3 38 GD114 114mmx 165mm 4 6 x 6 6 5 95 429 3 99 GD152 150mm x 250mm 5 91 x 9 84 10 47 7 39 698 GD153 150mmx300mm 5 91 x 11 81 11 95 869 8 30 GD1212 Somm caama x 12 NEWI 22 09 18 35 14 68 De veloper Tnisproductisusedasthe de veloper on our positive photo resist printed Circuit boards includes instructions 50 gram package mixes with water makes 1 quart rae s PRICEEACH CATNO DESCRIPTION 10 25 POSDEV Positive Developer 95 80 50 Etching Tank This handy etching sys tem will handle PC boards up to 8 x9 two ata time Ideal for etching your PCB s systeminciudes anair pump foretchant agitation a thermostatically controlled heater for keeping etchant at optimum temperature and a tank that holds 1 35 A of etchant A tight f
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119. Day H EL MMDS ATV INTERNATIONAL S BAND Amplifiers Antennas Books Components Filters Systems Video Products RF Frequency 1990 2700 MHz LOWER YOUR CABLE Cab dy VHF UHF s SASE For PREE Gatalon ae BILL N O W IPHILLIPS TECH ELECTRONICS PO Box 8533 Scottsdale AZ 85252 ORDER LINE 800 880 MMDS Five Year Waranty FAX LIN E 602 947 7799 an CHANNEL SURFERS BUY BONDS CIRCLE 145 ON FREE INFORMATION CARD I covered a lot of miles driving a cab for 13 years but I sure didn t get anywhere I mean the hours were long The pay was short My boss pushed pushed pushed all the Fn time In the meantime bills were piling up Medical bills Aa Oe House repairs Charge cards Just the everyday Caw things I was not just behind Phs i2 the wheel I was behind the eight ball That s when I saw a magazine article that talked about the hottest big money making career opportunities of the 90 s The one that interested me the most per tained to the NEW explosive SATELLITE DISH TV ELECTRONICS field I mailed the coupon for the FREE information kit they offered liked what I saw when the information packet came in the mail What really caught my eye however was the idea I could gain all the knowledge 1 nexded to make a success of this business studying in my spare time at home Foley Belsaw s modern practical hands on course combines simple step by step lesso
120. E 30 DAY of TECHNICAL SUPPORT FREE Powerful Analyses DC OPERATING POINT YES AC FREQUENCY YES TRANSIENT YES FOURIER YES NOISE YES DISTORTION YES Electronics Werkbench VERSION 5 INTERACTIVE IMAGE TECHNOLOGIES LTD 908 Niagara Falls Boulevard 068 Narth Tonawanda New York 14120 2060 Telephone 416 977 5550 TRADEMARKS ARE PROPERTY OF THEIR RESPECTIVE HOLDERS OFFER IS IN U DOLLARS AND VALD ONLY IN THE UNITED STATES AND CANADA ALL ORDERS SUBJECT TO 15 SHIPPING AND HANDLING CHARGE Fax 416 977 1818 Internet http www interactiv com CompuServe 71333 3435 BBS 416 977 3540 E mail ewb interactiv com CIRCLE 13 ON FREE INFORMATION CARD S JULY 1997 COVER STORY A GERNSBACK PUBLICATION 33 The DTMF Wire Tracer Mtaa Di nS Get a handle on those time consuming wire sorting or installation jobs Pop lar Flectronics with an easy to build two piece wire identification system Using a rr DTMF tone generator which produces 16 distinct tones and a tone decoder that identifies all 16 DTMF tones this speedy tracer makes Aurtoevat caliy lett jr Pir pir th oahle less dingle handedry short work of your wiring worries Brian Pliler CONSTRUCTION 43 The Heartbeat Machine This fascinating but simple circuit allows you to keep tabs on the rhythmic fluctuations of your heart by detecting changes in the flow of blood through your finger The pulsed blood flow is used to determine heart rate Anthony
121. ENS Hear External magnetic ways applied to meter to slow down and stop power meters while drawing fulf loads Plans 25 puters penetrate each other Sia and how VIRUSES TROJAN a NN HORSES WORMS etc are _ implemented Dozens of computer crim ard abuse methods and countermeasures In cludes disk filled with hacker text files and utilities and the legendary FLUSHOT protec tion system Internet advice password defeats glossary much more Manual PC Disk BEYOND VAN ECK 20 fern PHREAKING lt 9 Ke y Eavesdropping on TV and computer video signals using an ordinary TV described in detail Includes security in dustry reports Range up to 1 KM i fede both the onermertronics and the original Top Secret Van Eck designs ing Assistors Electronic Dowsers Shriek Modules x Ghost Detectors Vortex Genera tors amp Alien Brainblasters 6th Sense Com municators More Order Catalog Today AUTOMATIC jij TELLER EMER lt 3 MACHINES iy ATM crimes abuses vulner abilities and defeats exposed 100 methods detailed include Physical Reg E cipher PIN compromise card counterfeiting magnetic stripe false front TEMPEST Van Eck tapping spoofing inside job super cool vibration pulse high voltage others Case histories law countermeasures detailed security checklist labeled internal photos fig
122. ER CARRYING CASE Great looking padded carrying Case Suit able for most notebook computers or similar equipment Black leatherette exteri ON or with separate zippered compartment i for papers or accessories each Detachable nylon web shoutder strap Interior space is 13 5 X 9 X 2 5 75 CAT CSE 12 each ORDER TOLL FREE MAIL ORDERS TO ALL ELECTRONICS CORP P O BOX 567 Nichicon LGQ2W471MHSC 1 375 diameter x 2 high 0 4 lead spacing 50 CAT each EC 4745 10 for 40 00 THE INSULTINATOR A Programmable Electronic insult Machine you re A Totally Freaky Hand held voice synthesizer plays a variety of insults which can be altered by selecting various programming buttons Thousands of possible insults Even though no profanity is used a major nationwide retailer rejected these as being too insulting for their cus tomers Wild green and black case with belt or pocket clip Includes 3 AA batteries Attractive display package AT 5 95 CAT INS 5 each 24 for 4 50 each AUTOMOBILE VOLTAGE CONVERTER __ Run audio communications and other battery operated 7 devices from your car cigarette lighter Regulated DC DC converter supplies selectable voltages from 1 5 Vdc to 12 Vdc at up to 800 milliamps Adjustable polarity includes six different adapter plugs that fit most equipment 00 CAT APC 800 each
123. Fig 4 Here s the 8038 Waveform Generator IC with additional circuitry to improve operation and control Versatile Waveform Generator The next two oscillator circuits use an 8038 Waveform Generator IC that is designed to output a triangle square and sinusoidal waveforms simultane ously The first waveform generator circuit using the 8038 shown in Fig 3 illus trates the minimum number of external components necessary to generate the three different output waveforms The values of R1 R2 and C1 deter mine the frequency range of the gen erator Editor s note Component values can be determined by use of the approximate formula f 0 15 R1 R2 x Cf where f is the desired frequency of operation There is a price to pay in perfor mance for this circuit s simplicity The es 12V output waveform symmetry suffers because no provision has been made to balance the current feeding the two duty cycle inputs at pins 4 and 5 A sim ple fix is to add two 500 ohm poten tiometer controls to the circuit Place one of the controls between pin 4 and R1 and the other potentiometer between pin 5 and R1 Adjust both con trols for the best output waveform shape The 8038 waveform generator cir cuit in Fig 4 has a number of compo nents added to improve the circuit s operation Diode D1 allows a greater tuning range by permitting the voltage at pin 8 to rise above the voltage at pins 4 and 5 The two variable resistors
124. ICES STARTING AS LOW AS 99 00 CABLE TV DESCRAMBLERS 1 Year Warranty on All Products i Affordable Extended Warranty FREE CATALOG Re 1 800 379 3976 HTTP WWW ORION ELECTRONICS COM PROTOTYPES Or large runs PCBs wave soldering cabinets and other metal parts silk screen printing plastic injection xformer coil winding etc Assembly wiring Very low prices Twin plant in Mexico We ship to your door V amp V PH 713 537 7518 Fax 011 525 361 5996 MEASURE See aawe lt _ ENTRY Sowa F fr 9 3 r your PEA a n iw ane z rs re IP eee ae prs E Fa Fax 800 y pe am s 35g F gi A fet ad i Oo z T a fa Di T ai 7 Ga ri po Te J E 7 y E oe S P ee 1 ie wh Y SIHIG A Cat j p H m a fL Gi gare a0 a C ee Se re tree ee SURVEILLANCE The Latest High Tech Professional Electronic Devices Our latest catalog offers a HUGE selection of surveillance counter surveillance privacy devices hidden video equipment pinhole camera w audio 159 electronic kits telephone recording systems 7 Hour 125 16 Hour 199 touch tone decoders scannets bug phone tap detectors voice disguisers telephone scramblers locksmithing tools and more Catalog 5 00 SPY OUTLET P O Box 337 Buffalo NY 14226 716 691 3476 716 695 8660 KA CABLE TV CONVERTERS Equipment amp Accessories Wholesalers Welcome
125. ICS dis claims ony liobility far the infringement af such patents by the making using or selling of such equipment of circuitry and suggests thal oqyone interested in such projects consulta potent attorney What s better than Speed reading Speed Learning Speed Learning has replaced speed reading It s a whole new way to read and learn It s easy to learn lasts a lifetime applies to everything you read It may be the most productive course you ve ever taken Do you have too much to read and too little time to read it Do you mentally pro nounce each word as you read Do you fre quently have to go back and reread words or whole paragraphs you just finished reading Do you have trouble concentrating Do you quickly forget most of what you read If you answer Yes to any of these questions then here at last is the practical help you ve been waiting for Whether you read for business or pleasure school or col lege you will build exceptional skills from this major breakthrough in effective reading cre ated by Dr Russell Stauffer at the University of Delaware Not just speed reading but speed reading thinking understanding remembering and learning The new Speed Learning Program shows you step by proven step how to increase your reading skill and speed so you understand more remember more and use more of every thing you read The typical remark from over one million peop
126. IGITAL LOGIC FUNDAMENTALS circuit board Total Customer Satisfaction At MicroCode Engineering we are committed to total customer satisfaction When you purchase one of our products you have the confidence of knowing that a trained staff of professionals is available to serve you after the sale Our tree unlimited customer service is second to none Whether you have general or technical questions they will be answered promptly by a knowledgeable representative FREE Functional Demo Additional literature and free functional demos of our products are available on the Internet at http www microcode com and on CompuServe GO MICROCODE CircuitMaker 5 The Fastest Most Accurate True Mixed Signal SPICE Simulator CircuitMaker is a virtual electronics lab where you can quickly and easily design and verily digital analog and true mixed mode circuits You layout your circuit design as a schematic connecting an assortment of over 4000 indestructible com ponents Click on the simulation button and view the results as if you were looking at real laboratory instruments It really is that easy New users love CircuitMaket s user friendly environment and short learning curve Experienced users appreciate its time saving features and respect its accurate simu lation and numerous in depth analysis capabilities No matter what level of elec tronics you are at CircuitMaker The Virtual Electronics Lab will match your needs We are so con
127. INTAKE lt N FLYWHEEL __ al speed of the flywheel by tracking the teeth on flywheel s ring gear as shown in Fig 3 Flywheel speed is very sensitive to engine instabilities from too lean conditions which cause the motion of the pistons to become irregular When perfor mance improves as indicated by a return to the flywheel s normal smooth angular velocity the proces sor starts adding air to lean the mix ture again All that happens very quickly in about 2 5 milliseconds so that the adjustment is as close as possible to the ideal Ideal is an adjustment in the lean level hap pening before the next cycle fires When the driver applies full throttle during acceleration passing or hill climbing the computer rapidly commands a richer mixture According to LeanPower retro Fig 4 The LeanPower system uses a magnetic transducer to sense minute changes in the flywheel rotational speed The Lean 2000 signal processor controls a servo valve that regulates the quantity of air oxygen injected into the intake manifold on engines with standard carburetors fitting an old car with the Lean Power system would cost about 9250 including a needed tune up That price however could de crease with a new sensor the com pany is working on to replace the flywheel sensor The sensor would determine performance via an input from the tachometer On fuel injected cars the LeanPower sys tem
128. J Caristi FEATURES 47 Electronics Help Clean Up The Air Rather than forcing people to junk those old smoke generators elec tronics manufacturers are now producing retrofit emission control sys tems to help older vehicles comply with the new clean air standards Bill Siuru 51 Technological Arts ADAPT 11 Microcontroller Starter Package This foxy little portable microcontroller which generates Morse code at variable time intervals is perfect for learning electronics com puter fundamentals hardware and software microcontroller design and can be incorporated as the core of custom or new product design Larry R Antonuk 57 Stretching Rechargeable Battery Technolo Tailoring a synthetic carbon a commonly found in socks scientists at Sandia National Laboratory in Livermore California have created safer lighter longer lasting and less expensive rechargeable batteries using a lithium ion technology Douglas Page 58 Computers They re Taking Control Cartoon Fun POPULAR ELECTROMICS ISSN 1042 179 E Published monthly by Gerneback Publications Ine S00 Bi County Boulevord Farmingdale NY 1735 Second Cless postage paid al Farmingdale NY and ot additional mailing offices One year twelve issues subscription rate LES ond possessions 2195 Canada 28 Ad linclides GST Canddian Good ond Services Tox Registratian Na REZ Si6280 oll other countries 29 45 Subscription orders payable in US turds onl
129. National Institute of Standards and Y axis Carriage Scanning tunneling microscope probe Metrology reference mirrors Interferometer optics X axis Carriage Technology The machine will help shrink the microelectronics world even further tronics industry s most advanced measurement requirements into the 1990s M is the result of that effort The researchers expect M to measure within one billionth of a meter the equivalent of a string of four or five silicon atoms the dis tance between two points That s an area that is about a square 50 millimeters on a side just smaller than a folded dollar bill By com parison the range of most STMs is about one thousandth of a meter or one tenth the diameter of a grain of sand Figure 1 demon strates M s measuring capabilities relative to common objects For perspective M s capabilities are similar to being able to locate two widely separated grains of sand in a 2 500 square kilometer 960 square Continued on page 77 Scere ae soiu0ljoa y seindog 7661 Ane oT wo Popular Electronics July 1997 60 I Pe r ROSS m Trunked Transmissions he prayers of many scanner fans were answered with the introduc tion of Uniden America Corporation BC235XLT Trunk Tracker the world s first scanner capable of tracking a selected radio transmission as it moves across a trunked radio system This is a revolutionary unit to say the
130. OPE ALUMINUM i TUBING l nN j Fig 1 Construction details for the hanging loop antenna JOSEPH J CARR K4IPV the balun are along the vertical wires and the exact point is found by testing for minimum VSWR A good starting point is to make the connection point about one third the way up from the bottom of the loop Because the anten na is fed along the bottom edge this antenna is horizontally polarized The lengths of the elements are determined from simple equations given below For a half wavelength 2 use For a one sixth wavelength lengths In both equations Lpy is a length in feet and F mppz is frequency in MHz Typical lengths for five popular ham bands and the Citizens Band are shown in Table 1 below TABLE Loop Antenna Bean topina pend Fe me Meters Approx Feet eet om 285 Miz 5 47 tt 16 42 4h Br ear ee 42 249 627 1880 1S 2 1 D 3a 22 a These in are approximate of course as with all antenna lengths calculated from equations The actual lengths will be very close to these This type of antenna has a gain of about 2 to 2 5 dB over a dipole It has a figure 8 radiation pattern which means that the two main lobes are perpendic ular to the plane of the loop i e in and out of the page The reason that this gain is higher than a dipole is that this the pattern is narrower in both the hori zontal and vertical extent putting more power int
131. Popular Electronics July 1997 Qo TIPS FOR MAIL ORDER PURCHASE It is impossible for us to verify the claims of ad vertisers including but not limited to product availability credibility reliability and existence of warranties The following information is pro vided as a service for your protection It is not intended to constitute legal advice and readers are advised to obtain independent advice on how to best protect their own Interests based upon their individual circumstances and juris dictions 1 Confirm price and merchandise information with the seller including brand model color or finish accessories and rebates inctuded in the price 2 Understand the seller s return and or refund policy including the allowable return period who pays the postage for returned merchandise and whether there is any restocking or return charge 3 Understand the product s warranty Is there a manufacturer s warranty and if so is it fora U S or foreign manufacturer Note that many manufacturers assert that even if the product comes with a U S manufacturer s warranty if you purchase from an unauthorized dealer you are not covered by the manufacturer s warranty If in doubt contact the manufacturer directly In addition to or instead of the manufacturer s war ranty the seller may offer its own warranty in either case what is covered by warranty how long is the warranty period where will the prod uct be
132. R and Canada Must Pay Full Shipping Quantities Limited Prices Subject to Change without notice MANUFACTURERS We Purchase EXCESS INVENTORIES Call Write Ta EMAIL or Fax YOUR LIST s21u01 42843 18 NdOd Z661 Anr n CIRCLE 28 ON FREE INFORMATION CARD Popular Electronics July 1997 1 06 FREE SHIPPING Visa M C Amx Disc COD s Qty Pricing CHALLENGER SYSTEM 33 Channel 52dB Gain P Complete Grid 265 CATALOG INFO 602 947 7700 ATTENTION CABLE VIEWERS CABLE VIEWERS get back to your BASIC Cable Needs Call 800 577 8775 For information regarding all of your BASIC cable needs 5 GOOD REASONS TO BUY OUR FAR SUPERIOR PRODUCT PRICE EFFICIENT SALES AND SERVICE WE SPECIALIZE IN 5 10 LOT PRICING ALL FUNCTIONS COMPATIBLE WITH ALL MAJOR BRANDS ANY SIZE orper Fittep witH same DAY SHIPPING We handle NEW equipment ONLY Don t trust last years OBSOLETE and UNSOLD stock BASIC COMPETITIVE PRICING DEALERS WELCOME ELECTRICAL ee SUPPLY amp a Cis NOt the intent Of B E 5 W to defraud any pay tetevision operator an we will not assist any Company or individual in doring the same Refer to sales personnel for specifications WAREHOUSING Acer CORPORATION P O Box 8180 a Bartiett IL 60103 a 800 577 8775 HOURS Monday Saturday 9 5 C S T Part time Full time u 35 hour Just Publisned Home Based Electronics Busi esses Comprehensive Guide
133. Ruler Government researchers at the National Institute of Standards and Technology in Gaithersburg Maryland have developed a ruler that will be hard to measure up to Dubbed the Molecular Measuring Machine it has a range that is 250 000 times greater than that of most scanning tun neling microscopes STM Douglas Page REVIEWS 15 Hands on Report Casio Cassiopeia Pocket PC with Windows CE 21 Gizmo Olympus D 200L Digital Camera Adobe Systems Adobe Photodeluxe Play Inc Snappy Video Snapshot Video Digitizer Meta Tools Inc Kai s Power Goo SE Gryphon Software Corp Morph V2 5 50 Product Test Report Technics SL MC60 Compact Disc Changer MNS ll Multimedia Watch Unbelievably affordable GPS navigation plus a bunch of new soft ware Marc Spiwak 13 Net Watch Shopping for a Car Web Style Dan Karagiannis 16 Computer Bits Indispensable PC Utilities Jeff Holtzman 60 Scanner Scene Tracking Trunked Transmissions Marc Saxon 61 DX Listening Hallicrafters S 41G Skyrider Jr Don Jensen 63 Antique Radio Introducing the Freed Eisemann NR 5 Marc Ellis 65 Think Tank Audio Fun John Yacono 68 Circuit Circus ICs that Oscillate Charles D Rakes 71 Ham Radio Hanging Loop Antennas Joseph J Carr RTMENT S S 4 Editorial 6 Letters 19 New Products 20 Electronics Library 85 Popular Electronics Market Place 118 Advertiser s Index 118A Free Information Card Popular Electronics Larry
134. SAE aS M aa l E BOOKS Pa o A nE Voges Se a FOR GA95 ONLY 0331898 XK 38950 P Was EANA 2 i er plus 1 book FREE upon prepayment when you join the vy Electronics ee Book Clube zai 0345285 39 S5 THE ALARM SENSE Security Systems k SECURITY CIACHI COOKBOOK 0497060 29 95 Hardcover SOMPACT _ DESC PLAYER MAINTENANCE AND REPAIR 0375581 XX 39 5 Hardcover Counts as 2 Sa EECWENINI 0215286 19 95 ee As a member of the Electronics Book Club you enjoy receiving Club bulletins every 3 4 weeks containing exciting otfers on the latest books in the TRCUBLESHOOTING amp REPAIRING VCR ar4 Bask 155016X 34 95 Hardcover TY REPAIR mit GINGER 0535469 29 95 Hardcover K How to test almest everything electronic Pe cn E 0304058 17 95 0157553 44 95 Hardcover a Troubleshooting amp Rapsiring j Compact ise Players 0112738 XX 47 95 Hardcover Counts as 2 0157626 24 95 0359768 19 95 Understanding D pan Hed 5 sATELLITE Electricity and Senvice Electronics oa 7 B G Randy Save 0582157 26 95 Hardcover Basic Electronics Course Ing dhaw 1574875 19 95 mataji jpt and iintenance Ti an i is 0242048 XX 39 95 Hardcover Counts as 2 0053146 24 95 0053553 50 00 Troubleshooting amp Repairing PE Dri
135. SS system schematics 16 95 re NICS Box 30502R Bethesda MD ch he OBTAINING Sound for your VCII and VCII Plus is easy No codes needed Also DSS Test Card information Detalls 1 800 211 5635 OT ee HT e _ FREE Big Dish Catalog Low prices tems upgrades parts and 4DTV SKYVI 1ON 1048 Frontier Dr Fergus Falls MN 56537 1 800 334 6455 International 218 739 5231 www skyvision com il Mle SOUND for Videocypher ll and Plus without codes Free details SASE NASSIRIAN Box 382 P Rio Linda CA 95673 SECURITY ELECTRONIC sales of security systems for home apartment or business Wi send informa tion Call 812 295 4240 BUSINESS OPPORTUNITIES START your own technical venture Don Lan caster s newly updated Incredible Secret Money Machine I tells how We now have autographed copies of the Guru s undergroune classic for 18 50 SYNERGETICS PRESS Box 809 C Thatcher AZ 85552 520 428 4073 Visa MC TARSI NE eee SSS INVENTIONS ideas new products Presentation to industry exhibition at national innovation x position Patent services 1 800 288 IDEA positon ee A S aua _ millions in scrap g id from old electronics computers Circuit boards jewelry 24 hours 603 645 4767 EDUCATION a FCC CET software General Radiotelephone CET preparation Five 3 5 inch diskettes A for mat interactive comprehensive EGA VGA Complete program 35 00 TUTOR TE
136. Si XPS 1000C i niai JOCESTRESSANALYZERKT FAANEAD TTE TRANSMITTER KIT 4 ee SNORE SCANNER CONVERTER KIT 800 950MHZ See at a glance if your being lied to Separate level control for both left a mi home from anywhere andhearin papal ee e of the 800 to Subject need not be present Works and right channels l Hi side your home Z PANN with voices from recordings TV or Output level circuit with test points for i TouchTone coded for secure operation Works with any 400 550MHz scanner radio quick and easy tuning Stop burglars and intruders Gain 6 GB typical Has built in microphone Transmit from any stereo audio source Reliable 24 hour protection Noise figure 3 dB typical Easy to use LED display output to most any FM stereo receiver E ee ee ae ie foe a a a Serving the public since 1981 WE ACCEPT CHECK VISA MC MO COD SEND MAIL ORDERS TO XANDI ELECTRONICS INC SHIPPING amp HANDLING EXTRA E BOX 25647 Broad Rd 1270 E Broadway Rd 113 HA 7 WM Ml el BLO AIALA TEMPE AZ 25285 5647 CIRCLE 134 ON FREE INFORMATION CARD x ELECTRONICS INC 19913 Ndog 2661 Anr S uo0 l te 2 gt Popular Electronics July 1997 of 1oz board PRICE EACH CAT NO DESCRIPTION I 5 ER 3 Makes 1 pint 3 50 PE Our Complete Catalog is now Ke Check Out What We Have To Offer Fantastic DMM Offer Don t let the price fo
137. TELC M Box 832P07 Brusly LA 70719 GIET Yi DUSI A E S eo e WE carry all roga models RR 92 RC 83 550 MHz 99 Ch DQN7 550 MHz 99 Ch OAK Micro A 550 MHz 86 Ch SA 8529 550 MHz 99 Ch SA 8540 550 MHz with Vol Crt 99 Ch DRZ DIC DP 5 DPV 5 Pioneer 5135 amp Zenith 1086 Dealers are welcome Piease call us for the latest pricel Or visit us at our website http www vntechnology com thc sted a ALL chips 9 00 18 00 security bits from 9 95 converters filters Lowest price guarantee Anytime 1 800 760 0555 ANYON ON A aa MASTER files test modules amp cable boxes for all types of CATV converter units 909 941 4858 9 out of 10 mice prefer the Consumer Information Catalog online Just point and click your way to www pueblo gsa gov and you ll find more than 250 free publications ready to read or download U S General Services Administration SATELLITE EQUIPMENT _ VIDEOCYPHER II descrambiing manual Sche matics video and audio Explains DES EPROM CloneMaster Pay per view HBO Cinemax Showtime Adult etc 16 95 2 00 postage Schematics for pects ey Plus 20 00 e matics for Videocypher 02 15 00 Collection of Software to copy and alter EPROM codes 25 00 VCII Plus EPROM bin and source code 30 00 CABLETRONICS Box 30502PE Bethesda MD 20824 beinesdca MU ee Oo o DSS Hacking How to construct and program smart cards w pici6C84 software Complete O
138. Variable 2 5 20V 2A XK 550 Assembled and Tested 5169 XK 550K Kit 5139 Toois and meter shown optional MX 9300 Four Functions in One One instrument with four test and measuring systems 1 3GHz Frequency Counter gt 2MHz Sweep Function Generator Digital Multimeter Digital Triple Power Supply 0 30V 3A 15V 1A 5V 2A GF 8026 w Frequency e Linear and Log Sweep e O2Hz to 2MHz e Counter Range 1Hz to 10MHz 4 Digit Display 225 Auto Ranging Hand Heid Fluke Multimeters Digital Multimeter DMM w Bar Graph Model M 1700 70 Series 80 Series Model 70 I 69 95 Model 83 235 00 Model EDM 163 Model 7311 97 50 Model 85 269 00 Modeli 75 135 00 Model 87 289 00 Model 7711 154 95 Model 79ll 175 00 B amp K Precision Multimeters Modei 391 159 00 Modei 388A 99 00 39 11 functions including freq to 20MHz cap to 20uF Meets UL 1244 safety Specs 99 95 7 Functions with data hold Compares to Fluke Model 7711 VOL ee ee tt Cai Model 390 139 00 Model 2707 79 00 Model 389 109 00 Model 28604 85 00 a eenee Kit Corner Qa Model M 6100 over 100 kits available Programmable DMM Fiber Optics Includes FREE Computer Interface and FREE Software Technology Analog Bar Graph
139. What happens when you remove a single atom or bunch of atoms from the surface of a crystal What distortion does that Cause Teague wonders How far does the disturbance propagate over the sur face Does it affect the squareness of the crystal lattice M may even be able to use nature s own geom etry to validate measurements Interatomic spacings in a crystal for example with its highly ordered reg ularly repeating arrangement of atoms could serve as the molecular world s version of a ruler For mea suring squareness says Teague the right angles of a cubic Crystal lattice would be the ultimate reference I I dont know what Carl s up to but he s already de furred the cat soluodoaty Jeindog Z664 ANF a ba Popular Electronics July 1997 J o CLEAN UP THE AIR Continued from page 49 the opening of a servo valve that injects additional air into the intake manifold between the carburetor and intake manifold to produce the leaner mixture Under normal conditions the system keeps the engine running precisely at the lean limit If performance falls off because the engine is operating beyond the lean limit the comput er senses that over lean condition and commands the valve to reduce the amount of supplemen tal air so that the mixture ratio decreases Engine performance is moni tored by a magnetic transducer that senses changes in the rotation i AIR
140. You can start flying in seconds if you like and fly over 3D detailed cities including San Francisco London Tokyo New York Paris Chicago Seattle and more Flight Simulator for Windows 95 takes you to new heights of flight and realism Another flight game for Windows 95 one that s more of a fantasy shoot em up type scene is Hellbender This one makes you the commander of the Hellbender prototype attack craft a warship that bristles with high technolo gy You must destroy the Bion invaders before it s too late GEX for Windows 95 is a more unusual game This one fea tures a wise cracking gecko lizard named GEX who takes you for rides through five worlds based on classic TV shows and B movies This is a Super Mario type game except that GEX can whip his tail stick to surfaces including faces swim under water and more This one s also 44 95 The Microsoft Automap Trip Planner is an all new version of the popular road atlas and travel guide for North America Featuring over one mil lion miles of roadways detailed city maps and tons of information on key attractions and places to visit this is a complete travel planning package The Route Wizard will help you design a trip tailored to your personal driving preferences and you can specify the quickest shortest and most scenic route The highly detailed maps can be viewed on screen or printed No mat ter what kind of trip you re planning the A
141. ____ Phone _ en 6 City States Zip THE SCHOOL OF ELECTRONICS l Dept ELH341 6065 Roswell Road PCDI Atlanta Georgia 30328 E E E E OU A UMC A CU Address Bas a anr cei ee n E E M M electronics today We have thousands of 7 E ED A Ee aE carn ee Ll ae aad ate If you are not getting m this catalog you are missing out on some of the best deals in items ranging from unique hard to find parts to standard production components Call write or fax today to start your free subscription to the most unique catalog in the industry filled with super values on surplus electronic and hobbyist type items If you have a friend who would like to receive our catalog send us their name and address and we will gladly forward them a complementary 100 page catalog Why pay more Call today 540 East First Street Fax Order Line Dayton Ohio 45402 1 800 344 6324 Order Toll Free 1 800 344 4465 CIRCLE 147 ON FREE INFORMATION CARD Digital Entertainment also available through WSkyvision ast y A Afphastar Dv FOR C BAND sem Rul nning Strong y von e 72 E BEST Valves ER oe bi a a from Skyvision we Re eivers Everything on the ax for complete variety fro 259 sein fo ADTV Enjoy debut of new chamels Often in the clear for months OH Sa for all oe Bagh ede Wild feeds Acti C and Ku band dishes d feeds Ac gnas
142. about anywhere Makes an ultra sensi 4 tive intercom Dan be used as a 1 5W AMP We supply a mintelectret mike in the kit Power 4 requirement 6 to12v DC SIZE 1 75 x 1 AA 1 BUILT 29 95 KIT 10 95 Our TV filters eliminate unwanted TV channels or interference that alters both sound and video with a beep beep beep Work Fl LT ER S j 7 i ta Rj Avii SAES pre gt 2 thru 22 only PREAMP Boost your microphones output up to Ls line level Plug your mic into our AP 1 and drive your amp to fult capacity Connect an AP 1 to a pair of amplified speakers plug your mic in and you have an instant PA system Requires 6 to 12v DC Size 1 75 X 1 AP 1 hateten e DO NOTE Alt TV Filter Kits are sold for educational purposes only You must obtain permission from your local cable company before using these filters on your cable system DF 222 xit 14 95 kIT 9 95 Read the code from any INFRARED Device Complete with Software for any 80386 or 80486 base machine operating on DOS 3 3 or higher Sampled data can be saved to disk for instant comparison amp analysis Zoom in on and view any 8 millisecond portion KIT 89 95 Send your call sign or call CQ automatically with the push of a button Nee Change your message as often as you
143. al for use as rear surround speak ers or for adding wireless sound to every room in the house Full range bass reflex design with built f in high power low distortion amplifier Weather resistant cabinet for outdoor use Selectable battery six C size for each speaker or AC operation adap i tor included Built in recharging circuitrs for ni cad batteries System includes 900 MHz transmitter wireless speaker pair AC adap tors and all cables necessary to hook up system Limited availability Net weight 9 Ibs Frequency response 20 18KHz Pe ee a ee ee EEEN 30 day money back guarantee 20 00 minimum order We accept Mastercard Visa Disco shipping Shipping charg charge Hours 8 00 am ver and company C O D orders 24 hour e UPS chart rate 1 90 5 00 minimum 8 00 pm ET Monday Friday 9 00 am 5 00 om Saturday Mail order customers please call for shipping estimate on orders exceeding 5 Ibs Foreign destination customers please send 340 E First St Dayton OH 45402 1257 5 00 U S funds for catalog Quantity pricing available Phone 937 222 0173 Fax 937 222 4644 CIRCLE 146 ON FREE INFORMATION CARD sou0soe 3 seindod 7661 Ane ico Popular Electronics July 1997 tO Nh SMALLEST Wireless Video Transmitters f Used by hundreds of hobbyists and professionals alike in R C models Robots Surveillance Video movie Special Effects an
144. ammable solid lithium metal The carbon serves as a negative elec trode where electrons are generat ed in a battery The batteries con vert the chemical energy into elec trical energy The project is part of a three year cooperative research and devel opment agreement begun in 1992 with the U S Advanced Battery Consortium intended to develop new battery technologies Its pur pose is to meet the power needs of electric vehicles being developed to comply with approaching zero emission standards The require ments for zero emission vehicle sales begin with ten percent of the vehicles sold in the Los Angeles area in 2003 Lithium ion technolo gy using carbon and manganese oxide electrode materials has an inherent advantage in cycle life and low material cost A lithium ion battery the size of a book can store 400 watt hours and enable an electric vehicle to go four times farther than electric vehi cles operated from lead acid bat teries The bad news is right now about 100 of the lithium ion batter ies would be needed for an electric vehicle to operate at acceptable range and acceleration demands That liability does not apply to other applications In addition to electric vehicles lithium ion rechargeable batteries are useful in any power hungry application said Crocker such as laptop com puters cellular phones lawn mow ers Camcorders and cordless power tools because of their ability to work
145. amming of the rest of the library The actual player mecha nism laser pickup and CD drive shunts back and forth laterally behind the rack and extracts the selected CD for playback At any time even when music s playing you can open the front panel to load or swap discs That s easy Product enough and this way you can keep track of what s inside Some more expensive and elaborate jukeboxes have LCD readouts that iden tify the CDs within But unless connect ed to a personal computer and monitor they seldom display the entire play list You usually have to scroll through title by title Technics solution is low tech but decidedly easier If direct access to the data is what you want a photo style album accompanies the player so you can insert a CD s liner notes in a trans parent sleeve numbered to correspond with a disc s position in the changer Simple but effective an easy way to store and manage your entire music col lection The CDs are always in the changer eliminating the need to handle them What you do with the unoccupied CD jewel boxes is up to you The changer offers another easy way to at least organize if not identify Test Report TECHNICS SL MC60 COMPACT DISC CHANGER STEPHEN A BOOTH the 60 titles behind the door You can program the discs into five groups and then label the groups according to any of 14 musical genres such as Rock Jazz Classical Country Ballads Dance
146. antities by mail m or those who are inter F ese in physiological electronic instruments this project can be both educational and entertain ing especially at your next party Its design is based on a medical instrument called a plethysmograph The plethysmograph derived from the Greek word plethore meaning filled is used in physiology to study variations in the size of parts of the body as caused by the quantity and circulation of blood The Heartbeat Machine is specifically de signed to respond to blood flow and visually indicate the heartbeat or pulse rate of a human subject As reported in the Journal of the American Society of Psychical Research and the International Journal of Neuropsychiatry such an instrument could also be used as an indicator of extra sensory perception ESP in telepathy experiments The Heartbeat Machine resoonds to the varying quantity of blood in the fin ger and operates on the principle that transmission of light through the boay is influ enced by the pulsating flow of blood as caused by the heart The project is a self contained unit that allows the subject to rest his or her finger on a transducer assembly thereby allowing the circuit to detect blood flow Each time a heartbeat is detected an LED will fash An optional feature allows the builder to provide an audible tone burst in addition to or in place of the LED indicator The Heartbeat Machine is easy and
147. ar elements of each of the two images move to an intermedi ate position between them so that one picture appears to meld into the other Even if you ve never heard the word used it comes from the word metamorphosis you know what morphing is think of the Exxon video with the car that turns into a tiger or is it the other way around Or think of the Michael Jackson video with the faces of people of all different ages races and gender that change seamlessly soiuosjoa y Jeindog Z664 Ajnr N wW Ps iis Ele Edt Sequence Yiew KeyPonts Movie Yresows Hep from one to another We don t remember the name of the song but that morphing technology sure stuck in our minds Gryphon Software s Morph V2 5 lets you create morphs as either still images or AVI movies Morph s interface is reason ably friendly and easy to use It would have been easier if we had a user s manu al to go along with the program but the version supplied with Snappy doesn t even contain an on disk one and the help files were less than helpful when getting started Just a short overview section aind Image HACE fut would have been appreciated But mud dling through by trial and error got us on our way Morph lets you define how the points in a starting image and an ending image correspond to each other For example let s say that you want to morph your dog s face into your own You would want to mark features that
148. arousel changers have led the hit parade These house five CDs on a retracting drawer turntable and let you insert or change CDs even while one is playing Lately jukebox style mega changers holding 24 discs or more have been giving the carousel a run for the money With suggested retail prices as low as 250 for the 60 disc Technics SL MC60 CD changer tested here and dimensions no bigger than a carousel the CD jukebox is finally a viable choice for many people limited by budget and space on the stereo shelf They have just about all the same features and programmability options as single CD and carousel players and sometimes more What might be most interesting is that the access time from CD to CD isn t much longer than a carousel s despite the greater capacity of the jukebox For its price and convenience the Technics SL MC60 is a very alluring audio product Operating instructions are well written and complete and most important its performance in electrical tests is respectable though not spec tacular You will find a summary of these test results in the accompanying table conducted by the Advanced Product Evaluation Laboratory APEL an independent testing facility located in Bethel CT Features The SL MC60 holds 60 CDs stand ing on end side by side in a rack behind its drop down front panel There s also a slot for a single disc play which lets you insert or remove a CD without affecting the progr
149. ating morphs between two images Hi Pro Logic Mini System The Mode CCS 406 mini system from Pioneer Electronics USA Inc 2265 East 220th Street Long Beach CA 90810 1639 features full Dolby Pro Logic surround circuitry and high power high fidelity amplification for powerhouse surround sound The system s 25 disc CD File offers disc title input and 25 x 2 best selection mem ory functions for customizable music on demand listening Discs can be stored in groups of five for easy access The double auto reverse cassette deck has a music search mode The six inch two way speaker system includes three full range surround sound speakers for center and rear channels Other features include an integrated sleep timer a full function remote control and one touch Karaoke mode Price 785 Pioneer Model CCS 406 Mini System All Weather Speakers Just in time for the boating season Bose Corporation The Mountain Framingham MA 01701 9168 has introduced the Model 131 Marine Speakers Providing a practi cal solution for achieving stereo sound in the marine environment the round flush mount 131 speakers are compatible with the pre cut speaker holes on many boats Their 34 inch mounting depth and overall 8 inch grille diameter make installation easy on any water craft The speakers feature Bose s proprietary full range composite dri ver designed to meet and exceed industry standards for performance in harsh condi tions The 44
150. ations Ing 2290 North 1st Street Suite 107 San Jose CA 95131 408 965 4000 The ver sion reviewed 2 26 is no longer available The lates version 3 0 with added fealures is available for 99 95 coded to boot only from the primary partition of the first physical drive run my main workstation using DOS 6 2 Windows 3 11 Windows 95 and Windows NT 4 0 It would be possible to use just the built in boot managers in Win95 and NT to handle this arrange ment but doing so would involve com plex installation and making a series of choices from nested menus at every boot System Commander allows stan dard installation and integrates all choic es on one menu You can set a default OS and a time out so that your normal configuration will boot unattended A truly integrated version of Partition Magic and System Commander would be unbeatable E CASIO CASSIOPEIA Continued from page 15 accessories onto a desktop or note book system from one of the included discs You then connect the host sys tem to Cassiopeia with a serial cable Cassiopeia comes pre loaded with Windows CE but you modify your setup by connecting to a host system that has a CD ROM drive Our test sys tem found Cassiopeia right away and synchronized right up We were able to control Cassiopeia from the desktop system and easily drag and drop files between the two You can also syn chronize appointments with desktop applications such as Schedule
151. available today This complete electronics program includes on line instruction and testing workbooks and virtual labs Best of all you do not have to purchase any expensive laboratory equipment to have an exciting and accurate electronics training program CircuitMaker CBT will help the user learn and un derstand electronics and troubleshooting of both analog and digital circuits We guarantee it CircuitMaker 299 TraxMaker 299 CircuitMaker CBT 75 per module Call now to order or request additional information 800 419 4242 m MicroCode Engineering Inc 927 West Center Street Orem UT 84057 5203 USA Phone 801 226 4470 Fax 801 226 6532 e Internet _ Cart C17 OM CNC AENM ATIN Anann
152. ay nearly 50 years ago my father brought home a used shortwave receiver As a young boy had already dis covered the fun of tuning in stations in far off lands on the family s all band console radio heard HCJB in Quito Ecuador stations in Australia Switzer land and a few other countries I d even logged somewhat furtively in those days R Moscow T ee fatale De cea Is ease a Rare and unusual shortwave receiv 1945 46 But this set changed things Now had a real shortwave receiver It was a Hallicrafters S 41G This was no living room set it had no con sole styling varnished wood cabinet This was an honest to goodness six tube shortwave receiver in a no non sense boxy metal cabinet finished in black and crackled finish gray enamel On its face was stenciled the model number and its name Skyrider Jr its very appearance seemed to shout This is a DX machine it served me well for the next three or four years allowing me to hear CREDITS Erik Bueneman MO William Fiynn OR Don Moore MI Ed Newbury NE Sheryl Pasz kiewicz Christos Rigas IL Betsy Robinson TN er the Hallicrafters S 41W Skyrider Jr vintage maybe 40 or more countries Then though it was time for something big ger and better and newer So sold the S 41G Many years later regretted doing it was by then using a new solid state of the art receiver that could per form rings around that old six tu
153. aying Monty Python and the Quest for the Holy Grail on CD ROM from 7th Level Monty Python s Complete Waste Of Time was a great disc when it came out and so is this one especially if you ve seen and liked the film Basically you get to go through the story in your own quest for the Holy Grail with nutty Pythonesque interactivity with the cast and scenery along the way Plenty of wacky games are thrown in as well including Burn the Witch and Kill the Black Knight 49 95 is the suggested admission fee to this fun filled AKON romp through 932 AD Also from 7 Level comes Ace Ventura on CD ROM In over 60 exotic locations Ace must battle ani mal hating villains dodge obstacles and solve puzzles You keep inventory of the clues you ve collected along the way to help Ace solve the case Danger babes and butt yodeling can be yours for 39 99 lve got two new discs from Micro Prose one s a sequel and the other s an expansion pack Master of Orion Il Battle at Antares is the Sequel game to Master of Orion and it continues the theme of space exploration coloniza tion and combat Not for the casual game player Orion II can be a very involving game and the instruction manual is practically a soft cover book in itself If you re a fan of Sid Meier s Civilization Il you ll want to pick up Sid Meier s Civilization II Scenarios an expansion disc with 20 new challenges including the Civil War Alien Invasion the Crusa
154. ber But middle age nostalgia demanded find another Skyrider Jr the SW radio of my youth advertised in radio magazines and soon a fellow responded saying he had one he was willing to sell me sent him a 60 check and before long a cardboard box arrived at my door With anticipation opened the car ton And there it was a Skyrider Jr But this was not the radio of my boyhood Instead of the rugged looking gray and black cabinet this metal cabinet was white It was learned subsequently an S 41W for white not an S 41G for gray Well kept it anyway And a year or so later did come across another Skyrider Jr this one an honest to goodness S 41G was pleased to have them both but never switched DX LISTENING Hallicrafters S 41G Skyrider Jr DON JENSEN them on not wanting my memories dashed by the reality of 1940 s vintage technology Ever since these two table toppers have served me as a Set of bookends in my DXing corner But just the other day received a copy of Fred Osterman s new book Shortwave Receivers Past amp Present Communications Receivers 1945 1996 And as paged through it came across on page 121 of this 350 page softcover book my Skyrider Jr with photo and lots of information found out a lot about my boyhood radio that hadn t known before It was learned manufactured by Hallicrafters in 1945 and 1946 and sold new for 34 to 37 Even a half centur
155. bly It explores the under lying fundamentals and focuses on real world applications The book is an integrated source of knowledge and information for implementing a manu facturing system that will produce ever improved electrical thermal and mechanical performance of electronic circuits The book examines market driving forces and benchmark technologies as well as future prospects and emerging technologies including flip chip and chip scale packaging and assembly It covers surface mount soldering chem istry wetting and solderability no clean and water clean manufacturing fine pitch technology solder joint failure modes and reliability materials charac teristics and process troubleshooting State of the art IC packages IC lead coating and PCB surface finish atmos phere soldering lead free solders and new specifications and standards A wealth of data and tables are provided for quick reference Modern Solder Technology for Competitive Electronics Engineering costs 69 and is published by Mc Graw Hill Inc 11 West 19th Street New York NY 10011 Tel 212 337 5951 Fax 212 337 4092 CIRCLE 91 ON FREE INFORMATION CARD Java Security Hostile Applets Holes and Antidotes by Gary McGraw amp Edward Felten In March 1996 the Safe Internet Programming Team at Princeton Uni versity discovered a serious security flaw in the Java programming lan guage More recently additional flaws in Java enabled Web
156. c magic devices plus etc etc 2 00 refundable on first order number 505 in coupon AMERICAN INNOVATIONS SURVEILLANCE COUNTERSURVEILLANCE PROTECTION SECURITY EQUIPMENT For BUSINESSES INDIVIDUALS amp LAW ENFORCEMENT AGENCIES American Innovations Catalog Featuring Micro Cameras Hidden Cameras Board Cameras Voice Changers Scrambling Systems Tracking Devices Transmitters Bomb amp Weapons Detection Drug Detection Telephone Analyzers Tape Recorder Detection Video Detection Recording Devices Telephone Recorders PBX Security Wireless Video Systems Night Vision Bionic Ears Body Armor Air Tasers And Much More 6 00 Includes 10 discount off 1st order number 501 in coupon Electronics Purchasing Manual For same day shipping helpful technical assis tance no minimum orders and broad inventory selection send for Mouser s newest catalog featuring 68 000 components from 125 lead ing manufacturers including 3M Amp NEC SGS Thomson Rohm and more Mouser also provides many specialized services including cross referencing same day credit drop ship ments scheduled orders and guaranteed pric ing Mouser Electronics 958 N Main St Mansfield TX 76063 Catalog 800 992 9943 817 483 6828 Fax 817 483 0931 http www mouser com E mail catalog mouser com number 506 in coupon ORDER YOUR CATALOG TODAY SECURITY F amp S AUDIO VISUAL s PRODUCTS oe i a
157. can be switched off for totally silent non intrusive operation The LCD touch screen is divided into thirds The top section contains five always visible function buttons and five hidden confirmation indicators that appear on a need to know basis The bottom portion contains selectors for eight different system components Touching any one of them will call up a dedicated control panel for that com ponent in the much larger center por tion of the screen Three different center views com plete basic and custom are avail able The complete view shows a comprehensive array of pre mapped button icons The basic view displays only essential controls The custom mode allows the end user to configure a control panel specifically geared to his own system or a particular way of using it Short cut keys encourage quick cus tomization based on a library of self contained templates Users can also reconfigure each control panel without deleting commands linked to individual buttons For easy setup the RR 990 allows users to input only the codes needed to operate a particular system It also Supports custom macro program ming in which a single key touch can trigger a string of up to ten consecutive commands ka n The RR990 touch screen remote control has a suggested list price of 199 90 For further information con tact Rotel of America 54 Concord Street North Reading MA 01864 0008 Tel 1 800 370 3
158. ceive but private con versations other than broadcasts are not to be shared with anyone nor can you profit from information gleaned from them Editor DON T FORGET THE MAC USERS have been reading Popular Electronics for almost five years and have enjoyed it very much have just one problem see articles now and then for projects using the computer That would be great if had a PC don t have a Macintosh The truth is hate PCs The Mac is many times easier to use You only have one type of system software instead of Windows and DOS Even though there are different versions of the system software applications that run on one version will usually work on a later version and in some cases vice versa Also the Macintosh usually warns you that a problem is about to occur instead of letting you know after the fact when it is too late For example if you are copying a file to a floppy disk that doesn t have enough memory left the Macintosh lets you know before you copy not when you are halfway done realize that many electronics hob byists do use PCs But please realize that there are some of us that don t It would be nice to see a project now and then that was based on the Macintosh M C Hudson FL We ll keep you in mind Michael The staff agrees that the Mac should get some coverage but articles are scarce and Mac readers even scarcer Eaitor HAVES amp NEEDS need the readout
159. ches A full size template of that foil pattern is shown here the remaining ICs in their respective sockets With power re applied and using a small audio amplifier with its input connected to pin of IC4 a continuous stream of DIMF tone bursts should be heard Ncw check the individual output pins of C4 and confirm that a different DTMF tone burst is heaid at each output pin Once it s confirmed the 16 individual outputs of IC4 can be connected to SO1 The completed orinted circuit board can now be installed into a suitable enclosure using double sided tape or hot glue A bit of hot glue can also be used to help prevent the ICs from working out of their sockets The DB 25 connector is mounted to one end of the enclosure It will also be necessary to pre pare a 17 conductor test harness terminating to a male DB 25 con nector The author used a length of ribbon cable connected at one end to the male DB 25 connector and the other end connected to 17 miniature alligator clips 16 red jacked alligator clips for the signal leads and one black clip for the ground lead Tone Decoder Construction The tone decoder like the tone gener ator was assembled on a small printed circuit board this one mea suring 2 77 by 2 14 inches A full size template of that foil pat tern is shown in Fig 5 Once the printed circuit board has been etched and any problems corrected begin installing the Components guided by the parts
160. commo for business and personal invention P O Box 23097 ABQ NM 87192 INTERNET needs be amp include nonrefundable 30 I TRACKING amp TRACING The i spammers stalkers scammers rie eikon ORDER TODAY 505 237 2073 reesei amm in 7 10 days Confidentiality guaranteed i 7 7 ers who hide behind its ano nymity Learn how to trace them down in this comprehensive eye popping manual OFF THE SHELF Fax 505 237 2073 then 11 11 VU AU a Web Adventure www tsc global com U a nnter Established in 1971 Featured on CBS 60 Minutes Forbes New York Times van stems RES EM p Wave Rania Uhoasonie Ik Add 5 total S H US Canada l Postal M O is fastest VISA MCOK COD 49 9 add 7 Light Sound Detectors Xmitters Jammers Blasters Security Surveillance EM Weapon STOPPING POWER METERS Countermeasures Neurophone Rife Crystal As reported on 60 MINUTES How devices Radionics x Bug amp Tap Detectors Blasters x Lineman s Handsets Phone Color Boxes x can slow down even stop watt hour meters a Ty while loads draw full power Device plugs Voice Disguisers ESS Infinity Devices x DTMF Decoders x Child Finder Panic Button into one outlet and normal loads into other outlets Describes meter creep overload droop etc Plans amp Slot Machine Masters Subliminal Mixer Amps Ultrasonic Infrasonic T
161. contrast dial is very effective although the screen isn t very readable when the contrast is set low Cassiopeia comes with two CDs Windows CE and a bonus application disc a serial cable and two manuals a hardware manual basically explains how to work the controls and a Windows CE manual explains every thing else When you first turn on the system you have to calibrate the touch screen by pointing at an X that moves around the screen The pointing pen slides out of a holder built into the front of the unit Next a welcome wizard helps you set up the system with the proper date time time zone user infor mation and so on The LCD screen is hard to see in dim light but at least it has a backlight for when it s too dark to see Unfortunately the backlight really drains the batteries so it shuts off auto matically after several seconds You load Windows CE and all of its Continued on page 83 so1u0s 098 9 seindogd 7664 ANF an Popular Electronics July 1997 Computer Bits Indispensable PC Utilities tility programs fill in gaps left by Operating system vendors Here are several indispensable yet reasonably priced programs many cost less than 50 use all of these programs usually on NT 4 0 but also on Win95 and occasionally on DOS or other operating systems PowerDesk Utilities The PowerDesk Utility set includes a combination launch and toolbar a file l p i a a ae fi
162. control valve wiring harness and a three way aftermarket catalytic converter which are added to the exhaust S91u01 98 3 Jeindog 7664 Aine gt N Popular Electronics July 1997 a oe AIR CLEANER EXHAUST SENSOR _WHITE WIRE oe AIR VALVE 4 PIN CONNECTOR GREEN WIRE 12 VOLT POWER RED WIRE Fig 1 The Neutronics system 5 oxygen sensor is mounied to or near the exhaust mani fold where it can measure the oxygen content of the exhaust The oxygen content of the exhaust allows the computer to infer the air to fuel ratio of the air fuel mixture If the mixture is too rich the computer commands the control valve to increase the amount of air in the mixture On the other hand if the mixture is too lean the computer commands the control valve to reduce the amount of air entering the intake manifold The particu lar catalytic converter used depends on engine size and vehicle weight Neutronic Enterprises Inc already exports about 70 of its aftermarket air pollution control devices to Germany and South America The KAT 200 microprocessor feedback control system replaces the original oxidation catalytic converter used on cars with a new closed loop control device and three way catalytic converter The system can be used with either car buretors or fuel injection systems It can also be used on vehicles with out catalytic converters The device monitors the air fuel mixture and maintai
163. cs plus shipping and handling Supplements are sent 4 5 times a year and are fully i guaranteed Return any supplements you don t want within 30 days and owe nothing Cancel anytime Expand your knowledge while sharpening your skills ry P a age m P a o n g E oe iit p F C ry i F Tx a a ps 1 FE 8 pal iha hh a ar PIS Yens of Ex such as C Simple Logic Probe C Multi Purpose Gas Detector C Digital Combination Lock C Radiation Detector C Portable Frequency Counter _ and many other projects Build it Yourself e A lifetime of exciting electronics projects e Complete project plans e Step by step instructions flow charts schematics and photos e Troubleshoot and repair e Make your own printed circuit board acetate board layouts provided e Component suppliers addresses e Handy 3 ring workbench binder Electronics Fundamentals Electronic Components and their Characteristics The Op Amp Explained General Diagnostic Techniques plus much more EA Day Free Trial Order Form C Yes Please rush me my copy of C Electronics Repair Manual for only 59 95 33458 L C Modern Electronics Manual for only 59 95 33459 C Both Manuals for just 99 95 33460 ll may take 10 off the total price when enclose my check or credit card authorization by 7 31 97 Plus get free shipping and handling i understand that i
164. cuit Note that the SCR portion of Photo SCR Isolator IC1 is not connected because the positive half of the ringing current is enough to operate the circuit and the LED in IC1 balances the phone line A plain diode could replace C1 however do not know just what diode would be sufficient possibly a 1N4007 do think the LED match is better by using IC1 as shown There is a bit of work involved in this circuit but it is worth it You will need to run a phone line near your stereo used a four conductor phone cable two for the phone line red and green wires and the unused pair for the bell line You will also need to run a line from the doorbell chime to the unused pair telephone line input of the circuit The telephone stereo mut ing portion of the circuit is fairly simple and you could build just that eliminat ing the extra doorbell wiring and com ponents IC3 R4 D4 and 5 Whatever way you choose have fun Daniel P Rieskamp Cincinnati OH As a fellow listener to loud music can really appreciate this circuit Builder be advised to use a relay with a high contact amperage rating as the volt age and therefore the current pro duced by some amplifiers can be significant at loud volumes That s all we have room for this La Apa SES ELECTRONICS RULER Continued from page 59 mile plot of desert and then fo measure the distance between th
165. current processors operate from a single power bus and where it is imperative to closely monitor and care fully regulate the bus voltage The DVM is totally self contained and has only two input terminals The DVM is self powered in that it is powered by the voltage it is measuring and requires no external components Absolutely no technical skills or special tools are required for installation The DMS 20PC 3 DCM measures just 1 38 x 0 88 inches with a behind the panel depth of exactly one inch It features a large bright red LED display Continued on page 74 Popular Electronics July 1997 Popular Electronics July 1997 20 Electronics Library Modern Solder Technology For Competitve Electronics Manufacturing by Jennie S Hwang Ph D Today s and tomorrow s electronics products must deliver faster speeds lighter weights and smaller sizes at lower cost and with increased dura bility a continuing challenge for man ufacturers This comprehensive book helps you meet that challenge and exceed the demands of the global marketplace Modern Solder Technology tor Competitive Electronics Manufacturing Aimed at anyone who is involved in research production quality control or decision making management the book provides complete coverage of all relevant technologies that are associat ed with the application of solder for electronic and microelectronic packag ing and assem
166. d ed to vary the time off at least the off interval to make it sporting and needed to make the SK optional It was a good thing had some extra time T minus one day and counting Friday night rushed home and hit the computer needed to make the off delay adjustable not a bad idea even if Jim did think of it knew that you could get an adjustable value into the micro by putting a potentiometer on one of the A D converter inputs l d played with this on the DEMO program and knew you could get a value from 0 to 255 based on the voltage coming off a simple voltage divider pot found out where this was stored in the program and used that value to modify the time off period like this Idab adr4 timeoff Idx _ISECOND jsr WaitX decb bne timeoff This code simply takes whatever value between 0 and 255 that comes in from the A D converter address 4 and puts it in the B accu mulator Timeoff is simply a label The next two lines just perform a one second wait The decb instruc tion decrements the value in the B accumulator by one The next line Branches if Not Equal bne loops back to the label timeoff In effect this code loops through the one second delay once for as many times as are stored in the B accumulator The delay will be one second multiplied by the value coming in from the potentiometer In this case the off delay will be from zero to four and one quarter minutes a shor
167. d front panel Panel layout was a little different than that of the NR 5 with both fila ment control knobs on the right side of the panel instead of at opposite ends And the audio output jacks are grouped under the filament knobs instead of being spread out across the bottom of the panel The kit schematic which traced out many years ago is very similar to the NR 5 schematic But there are a couple of interesting differences in the filament circuit In this case the detector tube rheostat does indeed control just the detector filament and the amplifier tubes rheostat controls all of the other tubes In addition plug ging phones into the detector socket kills the filament of the first audio Stage The second audio filament just as in the NR 5 is always off except when a speaker is plugged into the second audio jack See you next issue E MICROCONTROLLER Continued from page 56 most boring part of the process Once the batch file is finished you simply flip the switch back to RUN hit the RESET switch and Hey Three Beeps not two It worked My three beep modification was in the micro The next night rushed right home from work buoyed by my success of the previous evening The tones generated by the pro gram were created using an out put compare function which is a built in timer function on the 68HC11 chip While the operation of this function was beyond my comprehension was s
168. d your vehicle ts not even on the road Special infrared beam with noise E Police laser i pay your speeding ticket B The Phazer makes yow car X invisible to police radar and lasers or the manotacturer will How it scrambles radar Police radar takes five to 10 measurements of a vehicle s speed in about one second The Phazer sends one Signal that tells the radar the car is going 15 m p h and another signal that the car is going 312 m p h Because police radar can t ver ify the speed it displays no speed at all To the radar gun your Car isn t even on the road Works with laser too The Phazer also pro tects your vehicle from Lidar guns that use the change in distance over time to detect a vehicle s speed The Phazer uses light emitting diodes LEDs to fire invisible infrared pulses through the windshield Laser guns interpret those puls es as a false indication of the car s distance blocking measurement of your speed Again its as if your car isn t even on the road Range up to three miles The Phazer begins to scramble both radar and laser signals as far as three miles away from the speed trap Its range of effectiveness extends to almost 100 feet away from the police car at which point you should be able to make visual contact and reduce your speed accordingly Encourage responsible dri ving While the Phazer is de signed to help you and me avoid speed traps it is
169. d Law Enforcement previously used expensive wireless units from Peico MVP and Supercircuits Nothing approaches the VidLinks in power picture quality size and value Thank you A Leslie CCTV installer NY The best Incredible color resolution very easy fo use cool P Davis Movie Props CA a Actual Size AEGIS Pak St A Fete 4 v VidLink 100 UHE Micro Wrolesa ideo Transivitter CATY 68 Live Remote Video From 99 00 e Full 100 mW RF Power Range 500ft to 1 2mile e Crystal Controlled e e High Resolution Full Color B amp W video e e Fully epoxy encased no exposed components e e Fully assembled only two wires to attach e MONEY BACK GUARANTEE VidLink 100 100mW Power upto 1 4 Mile 199 00 New High Power VidLink 15 15mW Power upto 150 Feet 99 00 New Low Price Same Size Covert Camera 1 1 4 sq Pinhole Lens 169 00 Pro Grade Japanese Quality Audio Module Now Available Call Check MO COD 5 00 S amp H 5 50 AEGIS 671 1225 E Sunset Dr RESEARCH Bellingham WA wv 98226 3529 USA 1 604 224 0416 Visit our virtual catalog on the INTERNET at http www lynx bc ca virtualspy Dn b j S es RANGE MOM OR aon om f av o e l o 1 oe a gt a THS Tey 7 1000KHz to 1 00GHz Spectrum Analyzer System Up to 500MHz Span Two bands All the advantages of a
170. d pre sumably is the same one that many early radio servicemen also had to Struggle with In any case it is good enough so that you can see the gener al design of the receiver The first thing you ll notice is that the set has five tubes which is characteris tic of the three dialer receiver Although not marked on the schematic diagram these are intended to be the 01 A tubes found in almost every set of this type made during that era Notice that there is a tuned circuit coil and variable capacitor in the antenna ground circuit It is followed by two RF amplifier tubes each working into an RF transformer whose secondary is tuned with a coil and variable capacitor The tuning dials for those capacitors are of course the three dials that give this type of set its jargon name Each of the two RF tubes has a neutralizing capacitor connected from the secondary of its RF transformer back to its grid Although the schemat ic is fuzzy you might be able to make out that these capacitors are labeled N C The third tube is wired as a con ventional grid leak detector You can see the grid leak resistor with its par alleled capacitor in series with the grid of the tube The output of the detector is cou pled via an audio transformer to the grid of the fourth tube which is the first audio amplifier This in turn is coupled via another audio transformer to the grid of the fifth tube or final audio amplifier Not
171. d sub notebooks with standard Type II and Type Ill PCM CIA expansion slots all three models feature a built in advanced power management system With full AT com mand capability the PC Cards are optimized for high speed stable Internet connections Dial tones busy signals and carrier signals are auto matically detected as are fax modem voice mail functions All models except the basic one are equipped with a corporate style digital voice mail answering system with multi ple password protected mailboxes The PC Card modems come with a telephone cord full featured communi cations software Internet and online access software and an operating manual The modems operate on DOS Windows 3 X Windows 95 and Apple System 7 or later Estimated street prices for the Models 33PC 33PC V and 33PC SP range from 189 95 to 269 95 For more information contact Logicode Technology Inc 1380 Flynn Road Camarillo CA 93012 Tel 805 383 2500 or 1 800 735 6442 24 hour BBS 805 445 9633 Web hAttp www logi code com CIRCLE 83 ON FREE INFORMATION CARD Touch Screen Universal Remote Instead of the host of often confus ing buttons found on most multi com ponent remote controls Rotel s RR 990 s front panel is a flat touch sensi tive LCD panel measuring 2 3 x 4 1 inches The backlighted display allows easy use even in darkened rooms A beep that usually confirms each operating step
172. d the original The Keyframe Palette can store up to 64 keyframes which can be used to cre ate animated AVI movies Kais Power Goo will morph from one image to the next the speed of the animation can be controlled by the playback slider It s very easy to go way too far out of control when using Kai s Power Goo creating what MetaTools calls Gootesque images Just turning the Twirl effect on full for example will render an image unrecognizable But untwirling it is just as easy and you might want to create an animation that uses unrecognizable frames as part of a transition You can always get back to your starting point by hitting the Reset button That s part of the fun you really can t go wrong Get as crazy as you like turn your boss into a grotesque ogre just be sure to hit Reset if you hear him approaching your cubicle E Morphing Magic MORPH V2 5 Published by Gryphon Software Corp 7220 Trade St Suite 120 San Diego CA 92121 Tel 619 536 8815 Price N A included with the Snappy Video SnapShot What are you going to do with all of those images that you ve been snapping scanning and digitizing If you have no desire to post pictures on a Web page and printing greeting cards just doesn t turn you on then maybe you d like to imitate some high priced advertising agencies and rock video makers and do a little morphing Just what is a morph It s a mix of two images in which simil
173. dden Video Cameras Telephone Tap Detectors MUCH MUCH MUCH MORE Our 27th Year Small catalog FREE Larger catalog send 5 Mail Order only Visa MasterCard and ANTIQUE ELECTRONICS WANTED Eico 239 volt meter Built before 1978 E i collect After 5 00 pm 50 00 to CABLE TV CABLE descrambiing new secret manual Build your own descramblers for cable and subscrip tion TV Instructions schematics for SSAVI gated SyNC sinewave some free methods HBO Cin emax Showtime UHF Adult 12 95 2 00 portage CABLETRONICS Box 30502PE Beth esda MD 20824 E ELECTRONIC Project Kits www qkits com 1 C O D accepted for equipment only 888 GO 4 KITS 292 Queen St Kingston ON fee A aE aa e E E as Inquire for dealers prices selec ALL E CABLE arere ret Anyone can bulid in A M C SALES INC oF CODIEE A ET eet seven steps with Radio Shack parts Plana kit 193 Vaquero Dr Boulder CO 80303 FMC Soa UO Lore 5 00 plus free bonus 1 800 818 9103 instructions 24 00 send check or money order to G SANTA MARIA 1602 A Washington Ave DESCRAMBLE cable using simple circuit E Z Suite 915 Miami Beach FL 33139 o mig Heli rae hea Com 00 1 809 Zi Jmunne marni a eee Bu opper 00 ALL in one catalog 60 mouth watering pages 8053 CB HAM audio T V yioroadcast science proj oar en CABLE Bullet Terminator and 1 0 Blocker ects micropower broadcasting broadcast
174. de Relative mode for comparison and to remove parasitics T Statistics tolerance m Best for design incoming testing amp production SMD and chip component test probe 25 00 Resistance 20 20MQ Resolution of 0 1uF 0 1pF and 4mQ are useful for high frequency and SMD Dissipation factor indicates leakage in capacitor and Q factor in inductor r Zero adjustment to reduce parasitics Best for high frequency RF SMD and chip component test probe 25 00 Padded deluxe case 6 00 Merete Splash proof a ae Sze Volt amp ohm logic diode continuity 3 5 Digit 0 6 accuracy n stead oie col Scope Meter a Ruggerdized case ed lh ranging aE Ruomotve heavy duty Fluke 97 1785 ner Saver Rubber hoister included mie se i kobba cat hor 10 OF Fluke 105 2799 a y LCR Meter 131D LCR Meter 814 ap Frequency Counter i 9999 229 95 189 95 mens FC 1200 129 95 gt Most Advanced LCR 10Hz Hz Dual display L Q or C D Best Resolution LCR ean E digit ioe 1 Inductance 10mH 10 000H Inductance 200vH 200H Penod 0 30018 l Capacitance 10nF 10mF Capacitance 200pF 20 000uF Records Max Min Average 20 MHz Oscilloscope with Delay Sweep PS 205 429 95 Dual Trace Component test 6 CRT X Y Operation TV Sync Z Modulation CH2 Output Graticule Ilium 2 probes each has x1 x10 switch Best price with delay sweep Digital Storage Scope DS 303 30MHz 20M Sample sec 849 96 DS 303P wi RS 232
175. der include the ability to warp bend or twirl afl or part of an image add type that swirls and warps add the illusion of motion play with the perspective to create a feeling of depth or turn your photos into black out lined coloring book pictures which can then be painted on or off screen The Art category provides six ways to create artistically stylized versions of your photos You can turn a photo into a line drawing or achieve an old fashioned look by making a color image black and white or sepia toned You can create posterized images that exaggerate pix els and reduce the number of colors or create soft impressionistic versions of your photos You can hand color your images to add color to black and white shots or to highlight elements of color shots Finally you can alter colors in all or part of the image In the Cool folder you find some of Kai s Power Tools a sampling of special effects filters from MetaTools They include Page Curl which makes your photo seem to be peeling up off the page Vortex for a kaleidoscope effect Charcoal Edges which transforms the soiuo0djoa y sejndog 7661 Ajar No mn Popular Electronics July 1997 RO Lop STATE wl Vl z5 This image was modified using Adobe PhotoDeluxe photo into a colored pencil drawing and Glass Lens which warps the photo as if it were reflected in a curved mirror The final folder in the Transform sec tion hel
176. des and more E Shopping for a Car Web Style ever trust a used car salesman That s a bit of advice you might have heard from a friend or seen in old movies However what if a sales per son trying to get you to buy a new or used set of wheels wasn t able to use his or her pushiness What if you were free of all the pressure that dealing with a live individual brings While sales people are only doing their job you should still be able to shop at your own pace ip fue raid EE AutoWeb is also a site that was named appropriately You ll find it a here Of course a lot of information can seem a bit intimidating at first glance Don t get scared by all the data and options that you ll be assaulted by when you first log on to this site There are miniature versions of some of Auto Web s features found here For exam ple you can enter a make of a particular used car you re looking for and then be whisked away to that sec psu Ainere bE gh ieee A FOA THE ee CHEVY RETAILER Tick to Visit Bill Heard Enterprises paaa eS I tn nd R ee ee ee ee Feedback f er aktet St t E ae net kitz re ee ET cep ieee AutoWeb gives you a real ye when it comes to TEE py new or used cars The site even makes it easy to sell a car you have Now thanks to the Web you can shop for a car or truck from the silence of your home without a smiling guy asking you every five seconds how much of a deposit you
177. display board from any of the following Heath televi sions GR2000 GR2001 GR2050 GR300 GR400 or GR500 The board contains an MM584 IC Heath part number 443 616 which is in the video generator for the clock and channel number on screen display have not been able to locate a source for the IC so maybe someone has a readout display board from which can salvage one l Il be glad to buy the board or even the TV if nec essary Thanks ROBERT M HARKEY 14401 Cabarrus Road Charlotte NC 28227 am looking for information on fre quency grabbers I m into scanning and it would be really cool to make one or order a kit for one I d also like plans for making a field strength signal meter so that can get an idea of how far the sig nals are coming in Does anyone know where could get the plans for either of those projects J FISHER 4401 Hillside Lincoln NE 68506 have the Most Often Needed Radio Diagrams published by Supreme Publications for the years 1940 1942 and 1947 and up Is there anyone out there willing to give a new loving home to the Supreme Publications published before 1940 and for 1943 1946 Also does anyone have a list of all the Supreme Publications books for consumer radios am not interested in TV receivers Drop a note to the Editor and he will contact me Thank you J V Brooklyn NY have an old multi band 5 tube superhet Howard Radio receiver vin tage 1939 40 that still w
178. don t need to be an experienced programmer to create sophisticated multimedia with Lingo and Shockwave This friendly and fun book shows you how to deliver high quality multimedia products that can be distributed on CD ROM or the World Wide Web It walks you step by step through planning developing and troubleshooting eight multimedia projects rTP NGO AND SHOCKWAVE SOURCE E BOO EH A Crates uals to irika j Maitrnacka for the Web and CTPA Lam pirn che pr green eng Linger anal Shes wwore Par ir mrad mp ee rrn ddan Ad pR E paupa cen yprapiact oand ad Dii Tia adie The book covers using and manipu lating text audio and QuickTime video as well as animating and synchronizing text graphics and audio it explains how to use Lingo and Shockwave to create Java like Web interfaces and to put dynamic interactive multimedia on the Web The book also serves as a multimedia programmer s primer on the subtleties of QuickTime video The included CD ROM contains all of the completed projects featured in the book movies ready to be pro grammed with Lingo and artwork audio and QuickTime video samples for you to work with A fully functional graphical interface makes it easy to navigate through the material on the CD ROM Lingo and Shockwave Sourcebook A Complete Guide to Developing Multimedia for the Web and CD ROMs costs 39 95 including CD ROM and is published by John Wiley amp Sons Inc 605 Third Ave
179. duce twice as much current at the same voltage That can cause output transistors to fail as they exceed their current carrying capabilities iike using a gt ton pickup to haul five tons of gravel Amplifier ratings used to be a slip pery business with manufacturers making all kinds of wild claims The so called rms rating is the most reliable To rate output power in watts using the rms method the amplifier is set up with a dummy load of the rated imped ance typically 8 ohms for home gear and 4 ohms for car equipment A 1 kHz sinewave is used as a signal source to drive the amplifier The input signal is increased until the output signal begins to clip The output voltage is then mea sured across the load with an rms volt age meter As an alternative the signal can be measured on a Calibrated oscilloscope When using the scope the peak to peak voltage is measured and the rms voltage calculated from the measured peak to peak rms voltage is 35 35 of the peak to peak or the peak to peak vonage multiplied by 0 707 Power is I R so the rms voltage and the load resistance are used to calcu late the current and finally the rated power in watts Peak power can mean anything An amplifier rated at 50 watts rms into 4 ohms could claim as much as 400 watts Peak power Because the TDA1554Q used in this amplifier project is rated at 4 ohms relied on the manufacturer s ratings and verified that m
180. e The SHARPNESS slide can add a little snap to object edges Color can be controlled with a TV like tint control or with separate red green and blue sliders Any changes are updated quickly in the low resolution preview window If you want to see them full size just hit the PROCESS button From the Adjust screen you can also zoom into a part of the image and crop it Images can be saved in a variety of typ ical Windows sizes or you Can create a custom size by adjusting the pixel width and height Images can also be saved with different color depths from 24 bit true color down to 16 color Acquiring images that look good on your PC monitor is relatively easy Getting images that look good in more demanding applications is a little more difficult The most important part of getting good pictures is starting with good light ing Most people are tempted to just point their camcorder at a person or object and press the SNAP button After all that s soiuosjoajy seindog 76614 ANF N d Popular Electronics July 1997 N pretty much how they shoot video With the Snappy however you should pretend that you are in a photo studio Set up those lights Shooting people is more difficult if quality is what you re after because mov ing video can t produce the same quality as still video If you can get your subject to stay really still however you can achieve success Very still for a long time remember
181. e could poten tially benefit a prospect that excites researchers Lithiumion rechargeable batteries will eventu ally replace almost all rechargeable battery technologies Sandia mate rials scientist Bob Crocker predicts because they have four times the energy density of lead acid batter ies such as those used in automo bies and two to three times the Fig 1 Here is a cross sectional view of the breakthrough rechargeable lithium ion bat tery developed by researchers at Sandia National Laboratories using common carbon fibers found in ordinary socks and carpets technology to new limits energy density of nickel cadmium batteries The heavy metals used in those conventional batteries are costly and pose environmental risks Lithium ion Virtues The new rechargeable lithium ion batteries are safer to manufacture and oper ate use less raw material and are environmentally benign The inter calation material for the new bat teries was designed at Sandia from an inexpensive chemical called polyacrylonitrile That is a fiber made of synthetic carbon and manganese dioxide which is com monly used in socks and carpets Sandia chars the polymer to cre ate a carbon matrix that is then impregnated with extremely light mia mr A i a E i eS ije a is Sen a PM i la he a PA S Fis Hi Loe Quit i a a ee rA oe Ea lithium ions That process eliminates the need to use inefficient and fl
182. e here but to have a foxhunt you need a fox There are plenty of spare radios around but don t we need some sort of timer to turn the thing on and off We can t just put a brick on the key and expect the thing to transmit for three hours Besides that would be too easy to find We need some sort of timer maybe a half a minute on a cou ple of minutes off You know take a direction bearing drive a little bit take another bearing like that Who can whip us up some sort of timing circuit was glancing at my watch again and when looked up noticed everyone looking in my direction You see had some kind of reputation as the club s electron ics expert Oh said Sure NO problem can throw something together by next month Heck could throw that together on my way home tonight Just take a 555 timer chip set it up with a variable pot to change the duty cycle Hold it Hold it It was Jim again was at a foxhunt once where they sent the end of message sign you know SK just before the trans mitter turned off That was great it let you know when you were about to lose the signal so you could take that one last reading Can we get something like that Well uh sure NO problem This was getting sticky Now had to put together a tone circuit maybe another 555 timer chip and some T he monthly ham radio meeting MICRO STA Here s a story abo
183. e Blvd Suite 360 Los Angeles CA 90048 5426 1 213 931 3444 ext 227 Fax 1 213 931 7309 TECHNOLOGY UPDATE Patented microelectronic antenna converts your home s wiring into a giant signal grabbing magnet This little box uses your home s electrical wiring to give non sub scribers cable subscribers and satetlite users better TV reception on your local broadcast networks ntil recently the only convenient way to U guarantee great TV reception was to have cable installed or place an antenna on top of your TV But who wants to pay a month ly cable fee just to get clear reception or have rabbit ear antennas that just don t wark on all stations Some people just aren t interested in subscribing to cable Or they may live in an area where they can t get cable and TV top antennas Why don t conventional antennas work as well as the Spectrum _ t b ti i j aes n wE ae ag Hele abi P rad A a R i esoecocoocoosanocoo eeoeooecceesecoseresaceee Spectrum Antenna Parallel 75 ohm resistance For minimum loss of signal control Dual outlets with Signal search For selecting multiple antenna configurations Resonant fine tuner control For dialing in crisp clear TV stereo reception elimi nates ghosting surge protection aren t powerful enough And what about those people who have cable or satellite systems but still can t
184. e above para aaa Eray pi ace a oe a a e ee ae BOS gees graph The assembly file is changed into an S record file which is a stan dard file format for Motorola micro controllers This S record file is changed into a binary object file using a conversion utility The binary file is then sent to the controller via the RS 232 port This whole process takes longer to explain than to per form and all of the necessary assemblers Converters and batch files are included with the ADAPT 11 package Once the binary file is ready to send to the microcontroller you simply load up a batch file flip a switch on the board and hit the board s RESET switch This puts the board in a ready to get pro grammed mode Hitting a key on your computer starts the batch file that sends the information to the micro The download process takes about a minute and a half the Continued on page 81 STRETCHING BATTERY TECHNOLOGY Tailoring a synthetic carbon fiber commonly found in socks researchers have stretched rechargeable battery Douglas Page cientists at Sandia National Q ccc in Livermore Cali fornia have created safer lighter longer lasting and less expensive rechargeable batteries using a lithium ion technology that shows considerable promise The new bateries were specifically developed for use in electric vehi cles However other industries such as consumer electronics aero space and defens
185. e anty 110 84 Queens Bivd 485 Forest Hille NY 11375 NO ce Popular Electronics July 1997 TURN YOUR PC INTOA DIGITAL STORAGE OSCILLOSCOPE Responsive Digital Storage Mulllacope The all new PC MuitiScope 2 LU HE penk H analog bandwidth D _ oY cf B B a d Ca At right Actual scope screer as seen on your PC monitor O00008 e wace PR NAc peg nnm cc poo ne lt lt lt Tii 0000000000008 lt at TEREI BszRBOPR NE SHES ey O00000 O00800 00000000 gi if _ Dua channel external triggered _ Digital storage Windows based _ Connects to PC parallel port _ 20Megasamples sec sampling 10Mhz max analog bandwidth _ 8 bit resolution 8K RAM buffer Prog gain 10v div to 1mv div Spectrum analyzer fft function _ Strip chart recorder function 399 S H Visa MC Check OK 9 TTL output for control app s Add 99 for source code option 10 Visual Basic source code avail The top choice of corporations universities and scientists worldwide AMAZE ELECTRONICS CORPORATION amaze hooked net www hooked net users amaze Phone 800 996 2008 Fax 408 374 1737 AWN a For industrial educational hobbyist auto and audio test amp measurement ONAN YOU CAN WIND YOUR OWN COILS There s no
186. e baby s room on 64 An office can watch the warehouse and the front door The CAModulator uses coax pow ered technology It requires only one wire to the camera for both power and video signal It can use UHF channels 14 44 and cable channels 45 94 Well suited for stealth surveillance the CAModulator weighs only 3 5 ounces and fits in a single gang junction box or mud ring preferred It comes with a 12 volt DC transformer the power injector that lets you power the unit through the coax cable and a choice of clear IR or smoke gray lens cover No one knows there is a camera behind the wall plate The device does not need to see straight ahead It adjusts up and down and right and left to match most instal lations Thanks to its ability to see with infrared illumination the CAModulator can be used for all forms of nighttime surveillance Other features include adjustable focus from one foot to infin ity electronic automatic iris and built in wide angle lens The CAModulator has a suggested retail price of 399 For more informa tion contact NetMedia Inc P O Box 68416 10940 North Stallard Tucson AZ 85737 8416 Tel 1 888 RUN TABS CIRCLE 81 ON FREE INFORMATION CARD Two Terminal Digital Voltmeter Datel s DMS 20PC 3 DCM digital voltmeter DVM is designed for appli cations such as large client servers or MPP massively paralleled processing computers in which multiple low volt age high
187. e is 899 also offers auto focus and something called focus lock which allows you to focus on something lock it and then move the camera so that some thing else is in the center of the frame E Desktop Darkroom ADOBE PHOTODELUXE 1 0 From Adobe Systems Mountain View CA Tel 1 800 833 6687 Web http www adobe com Price 90 Digital photography is wonderful in concept But let s face it The straight from the camera images leave a lot to be desired They simply can t compete with 35mm photos in terms of resolution and color quality In reality it takes digital image processing to bring those digital photos to life to insert them into school projects or business presentations post them on the Web or create customized calendars or greeting cards In the world of professional digital image processing Adobe Photoshop is highly touted for its sophisticated innov ative handling of high end graphics tasks Unfortunately the software carries an 895 price tag and takes a lot of time and effort to learn Adobe Systems has wisely come up with a scaled down version of Photoshop PhotoDeluxe With a street price of about 90 and an interface that couldn t be eas ier to use the program is aimed squarely at the growing population of consumer digital camera users In fact Photo Deluxe is included with many models including the Olympus D 200L also reviewed in this issue The PhotoDeluxe program doe
188. e plugged Into an electrical outlet with responce to time date other X 10 transmissions or any other computer input stimull 36 50 DTMF Decoder Logger Keep track cf all numbers dialed or entered from any phone on your line Connects to your telephone wall jack Decodes all 16 touch tones and displays them on an LCD display Holds the last 240 digits In a non volatile memory roll through and view all telephone numbers dialed credit card numbers entered etc 54 50 RS 232 Digital I O Give your home brewed PC Mac programs a link to the outside world 12 O pins can be configured Individually for input or output Turn on off relays triacs etc Respond to button presses switch changes 4x4 matrix decoding with auto debounce Stack up to 16 units on the same seria port for a total of 1921 0 points 32 00 Telephone Scrambler IR Remote Control Receiver Scrambles your voice before sending it over the telephone line Prevent eavesdropping from an extension or tap Connects between your telephone and wall jack No modifications are J required to your telephone Full duplex operation 00 Learms and records the data pattems emittad by standard Infrared remote controls used by TVs VCRs Stereos etc Lets you contro all your electronic projects 4 with your TV remote Seven Individual I O pins zan be assigned to any button on your remote
189. e takes a couple of minutes as the screen is refreshed forget it In that way Kai s Power Goo is radically different For input Kai s Power Goo supports TIFF BMP Photo CD and Photoshop file formats For output only BMP and Photoshop formats are supported When started the program defaults to an image of the Mona Lisa To import a different image you don t choose File Open as you might expect No such menu exists nor does a title bar Instead you click on the word In at the bottom left corner of the screen The main user interface the Goo Room contains a Goo Brush palette a Goo Effects Palette a control skider and a playback slider You put your gooed images into the Keyframe Palette found along the bottom of the screen The Goo Brush Palette contains nine different distortion brushes Reset Grow Shrink Move Smear Smudge Nudge Mirror Toggle Smooth and UnGoo The Goo Effects Palette also has nine different distortion effects Reset Bulge Twirl Rotate Stretch Squeeze Spike Static and Unwind The difference between the two palettes is that the brush es are used to create distortion where you paint the image while the changes cre ated by the Effects Palette are global to the image The strength of the effect is determined by the position of the Control Slider The control slider can also be used with the brushes to transition between the current Goo composite image an
190. e tap contacts can short out fuse boxes but not ATC lead wire fuses Order Amps 60 3855 5 60 3860 7 5 60 3865 10 60 3870 15 More than 24 000 TV VCR trouble shooting suggestions Regular price 69 95 Order 814 2205 81 2206 Order Amps 60 3875 20 60 3880 25 60 3885 30 Version DOS Windows Order 8 1 2055 Allows you to cross reference VCRs with all models that are mechanically the same Great for second sourcing parts service continuous 30A duty cycle manuals and more Crosses over 2000 VCRs Regular price 29 95 Kit cantains 90 popular IC Prices Effective May 20 through July 31 1997 To take advantage of these prices you must supply this Order 72 4030 special price code CODE POP42 3 Digit DMM also doubles THEA DC Powers srt i t 2 pani gA ro Order 72 870 Order 102 006 Great for removing protectors used in many VCRs and camcorders like miele A e T JVC RCA Hitachi Pi i hex driver Zenith and Sony Order Size Regular price 41 95 1145S 22 1150 4 5mm Hours M F 7 a m 9 p m Sat 9 a m 6 p m EST 650 CONGRESS PARK DR CENTERVILLE OH 454593 A PREMIER FARNELL Company Visit MCM s website at www memelectronics com accurate temperature meter Ideal for appliance repair and many other applications Regular price 79 95 tamper proof screws found in 00 543 433C MCM ELECTRONICS lt n F Daa T
191. e w Wire Jumper AS LOW AS 5 25 ea e PM 129 Single 9VDC Operation iia cashes ees OR AY e Decimal Point Selectable Size 67mm x 44mm PRICE EACH e PM 128 13mm Figure Height CAT NO DESCRIPTION 1 10 25 100 250 e Automatic Polarity Indication PM 128 3 1 2 Digit LCD Panel Meter 9 90 7 09 6 40 5 86 5 25 e Guaranteed Zero ReadingforOVoltInput PM 129 3 1 2 Digit LED Panel Meter 1149 9 4 867 795 695 PM 328 4 1 2 Digit LCD Panel Meter 19 88 16 40 14 90 13 66 11 93 e High Input Impedance gt 100Mohm T Ball Bearing 12V DC Fans These High Quality Fans feature Ball Bearings and Brushless DC Motors i Ali of them are designed to meet UL CSA amp VDE Standards Design these fans into power supplies computers or other equipment requiring PRICE EACH additional air flows for heat removal CAT NO l 10 100 These fans are regular Circuit Specialists CSD 4010 12 9 88 6 38 os aa stock items they are not surplus CSD 6025 12 9 38 9 91 CSD 8025 12 8 88 5 85 5 19 a l CSD9225 12 8 95 6 14 5 29 INDUSTR Y BEST PRICING CSD 1225 12 11 45 8 96 7 82 6 85 Specifications RATED START INPUT STATIC DIMENSIONS VOLTAGE VOLTAGE CURRENT AIRFLOW PRESSURE SPEED NOISE LEVEL CAT NO MM V V A CFM INCH H O RPM dB WEIGHT 9 CSD 4010 12 40x40x10mm 12 7 0 06 5 1 0 19 5 500 26 20 CSD 6025 12 60x60x25mm 12 5 0 13 13 7 0 165 4 500 28 65 CSD 8025 12 8Ox80x25mm 12 5 0 16 37 8 0 177 3 000 31 80 CSD 9225 12 92x92x25mm 12 5 0 32 42 0 18
192. ecoder out pui at pin 8 is not used A square wave form is available at pin 5 and a triangle waveform is produced at pin 6 The cir cuits operating frequency is deter CHARLES D RAKES mined by the RC values of C4 R1 and R2 The values of R1 plus R2 should be no greater than 25 000 ohm while the following capacitor values for C4 will help in selecting a frequency range 4 7 uF 10 Hz to 100 Hz 0 47 uF 100 Hz to 1 kHz 0 047 uF 1 kHz to 10 kHz 0 1 uF 500 Hz to 5 kHz and 0 01 uF 5 kHz to 50 kHz The oscillator circuits of Figs 1 and 2 are very similar and produce about the same frequency range with similar RC tuning values Both outputs are high impedance and should be isolated with a buffer between the IC and any con nected circuitry Fig 2 A simple circuit with a 567 PLL Tone Decoder results in square wave and triangle wave outputs PARTSLIST oos FIG 2 gt CAPACITORS aa O1 O 22 uF ceramic dise Sob ho oy b 8 oy C2 0 47 uF ceramic disc C3 0 1 uF caramic dise z c C4 See text ADDITIONAL PARTS AND MATERIALS a Rl 20 000 ohm potentiometer R2 2200 ohm watt 5 resistor 1C1 567 Radio Shack RSU q 10872125 oF eguivalerit R3 10K C1 SEE TEXT 12V LI a Y OUTPUTS Fig 3 The versatile 8038 Waveform Generator IC in its simplest configuration to gen erate several waveforms
193. ed eye and all sorts of other flaws when you devel op your photos on your computer The D 200L is compatible with IBM PCs and Macs interface cables for each type of computer are included with the camera They plug into either the COM or COM 2 serial port on an IBM compat ible PC or to the printer or modem serial port of your Mac Windows 3 1 or 95 or MacOS 7 0 or higher are required as is a monitor with a minimum of 256 colors and 640 X 480 resolution The version of Adobe PhotoDeluxe that is included with the D 200L also requires a double speed CD ROM drive as well as more than 45MB of free hard disk space and more than 16MB of RAM The supplied disk contains all the soft ware needed to download photos from the camera and manipulate them on your computer For Windows based systems the D 200L s software uses the TWAIN standard interface For Macintosh sys tems the software uses an Adobe PhotoShop compatible plug in module Installation is an easy question and answer process that takes just a few min utes A separate review of Adobe Photo Deluxe follows Comparing digital and 35mm point and shoot cameras is like comparing apples and oranges they re really two completely separate product categories Despite Olympus s attempts to maintain a modicum of familiarity in styling the D 200L the digital camera is not likely to hold much appeal for avowed techno phobes If you aren t comfortable
194. em to within one millimeter M works by combining the atomic imaging capability of an STM with technology for moving and position ing the STM probe over much larger areas with unprecedented preci sion That gives M the ability to sur vey the landscape between atoms on the molecular frontier The Outlook Right now however M is flying blind without instruments Like other STMs M suffers from tunnel vision The hard part is discerning and fixing the positions of things that are so far apart Teague said For objects at opposite ends of M s range the separating distance spans a billion times the diameter of the objects themselves Without navigational aids M would be lim ited to exploring only small corners of the molecular domain To locate and track the probe as it scans billions of atoms over the surface of a specimen Teague s team uses what amounts to a Global Positioning System Both M and the sample are mounted on sliding carriages machined to move in extremely precise increments A metrology box made of an ultra high stability ceramic is used to pro mm l cem i M measurement area Pentium chip scale I nm M total mm a uncertainty jeter ee goal woo ee f T ee D 4 3 f i i i erat crit H interferometer loj fuckyball i displacement i i 3 aray Cal 4 resolution 4 o n0 f Fe a ae silicon i j 3 e aroma E a 10 000 000 x 1 000 00
195. enerator 5 completed printed circuit board along with its 9 volt battery power source was installed into a small enclosure The board was secured in place with double sided tape but hot glue will also do the job system has been used by the author to identify individual conductors in multiple runs of inexpensive tele phone cable at lengths exceeding 50 feet CAUTIONI The DTMF Wire Tracer is not designed or intended for use on live or otherwise in use conductors whatsoever Tone Generator Description The schematic diagram for the tone generator is shown in Fig 1 In that circuit half of a 4011 quad two input nano gate IC1 a and IC1 b along with RI and Cl form a sim ple oscillator The oscillator operat ing at approximately 12 Hz with a 50 duty cycle is used to generate the necessary clock and timing sig nals for the tone generator The clock signal is used to drive IC2 half of a 4520 dual synchronous up counter which repeatedly counts from hexadecimal 0 to F or in bina ry from 0000 to 1111 and outputs the count data in binary form The binary output of the counter is fed along two paths In one path the output data is applied to the address data select inputs of IC3 a National Semiconductor TP5088 DTMF generator and in the other path the signal is fed to IC4 a CD4067BE 16 channel analog mul tiplexer demultiplexer The DTMF generator IC3 cou mri E
196. enhanced CAD package SuperCAD for only 249 e Powerful event driven digital simulator SuperSIM allows you to check logic circuit aay before actually wiring it up Works directly within the SuperCAD editor from a pulldown menu and displays results in logic analyzer display window Starting at 149 this is the lowest cost simulator on the market Support for PALs a larger at and a separate interactive logic viewer are available in full featured SuperSIM for only 399 Library parts include TTL CMOS and ECL devices e Circuit board artwork editor and autorouter programs SuperPCB starting at 149 Produce high quality artwork directly on dot matrix or laser printers You can do boards up to 16 layers including surface mount Includes Gerber and Excellon file oe Autorouter accepts netlists and placement data directly from the SuperCAD schematic editor e Low cost combination packages with schematics and PCB design 2 layer for 399 16 layer for 649 DOS version available Write or call for free demo disks gt AUTOMAT 5415 136th Place S E BBellevue WA 98006 206 641 2141 BBS 206 641 2846 http www mentala com EPROM PROGRAMMING SYSTEM USES PARALLEL PORT 24 28 32 amp 40 PIN 27C AND 25XX 1702 2708 TMS2716 32 32A 64 64A 128 128A 256 512 513 011 010 101 1001 1000 1024 210 020 2001 220 204 400 1 2 040 080 240 4096 68 764 66 FLASH EPROMS 28F256 28F512 28F010 28F020 29C257 29C010
197. ent of the sec ond audio tube until a set of switch con tacts is closed by the act of inserting a plug into the second audio jack Thus the tube remains dark conserving A battery power except when it is in use The switching arrangement built into the detector and first audio jacks doesn t involve the filament circuits although there are some unused con tacts on those jacks that could have been intended for possible filament switching When a plug is inserted into one of those jacks the connection from the plate of its associated tube to the following audio transformer is bro ken and the phones are placed in series with the B supply Power Feeds Before leaving the NR 5 circuit dia gram let s take a look at how plate fil ament and bias voltages are fed to the various portions of the circuit The voltages obtained from batteries of course reach the set through the group of labeled binding posts shown at the right of the schematic diagram The topmost post labeled 90 supplies the required 90 volt B to the RF and AF amplifier tube plates the first two and last two tubes Directly under that labeled 45 is the post supplying the 45 volt B required for the plate of the detector middle tube Below that labeled B 6 is the fila ment and plate connection And under that labeled 6 C is the post sup plying filament A voltage to the five 01 A tubes and serving as the retu
198. ers contribute far more than their fair share to the air pollution problem For instance in California 1980 and older vehicles account for only about 20 of the vehicle popula tion and total miles driven However they produce about half of the vehicle emissions One answer is to remove the high emit ters from the road through acceler ated retirement programs There are clunker programs that pur chase old cars for scrap for a few hundred dollars Unfortunately those old cars are often owned by the people who can least afford to replace them The alternative for them is to install aftermarket emis sion control equipment that will reduce the amount of pollutants that the cars produce allowing them to provide daily transporta tion with minimum harm to the environment The KAT 200 One such retrofit emis sions scrubber is the KAT 200 devel oped by Neutronic Enterprises Inc San Diego California After retro fitting with the KAT 200 Micro BILL SIURU Controlled Emission system most vehicles even those without either CATALYTIC CONVERTER WIRING HARNESS feedback controlled emission sys tems or three way catalytic con verters can meet current U S Federal or E C European Commu nity emission standards MICRO COMPUTER OXYGEN SENSOR The Neutronics aftermarket emission system consists of a Kat 200 Micro computer a heated or unheated oxygen sensor a linear actuated stepper motor induction
199. est equip ment called ReNewed equipment which is cleaned and calibrated in TestEquity s lab and warranted for one year parts and labor TestEquity also buys recent model test equip ment FREE number 514 in coupon I YATIONAL PUBLICATION FUR BUYERS AND SELLERS OF OLD RAMOS AND ELATED EMS PURIST MORTICE E Antique Radio Classified Antique Radio Classified is antique radio s largest circulation monthly magazine A typical 100 page monthly issue contains articles and hundreds of classifieds for old radios TVs ham equipment hi fi art deco and transistor radios telegraph books amp more We also offer prica guides and books on repair and restoration and guides for the novice collector Antique Radio Classified is your link to the world of collecting old radios Sample 4 00 number 502 in coupon COMPLETE WIRGRMATION CATALOG OF E AMAZING and FASCINATING Devices information Unlimited The catalog of amazing and fascinatng elec tronic and scientific products Learn how to build a burning cutting laser an electronic gun capabie of ballistic velocities particle beams surveillance devices force fields anti gravity mind control and hypnotism ultrasonic infra sonic shockwaves telsa coils lightning gener ators free energy telekinetic enhancers time quenchers plasma guns high power pulsers for rail guns and exploding water security per sonal protection electroni
200. eters Audio Generators amp Meters Frequency Counters Meters G Bridges Power Supplies Function Generators RF Generators PRINT Products International CABLE CONVERTER DIAGNOSTIC TEST CHIP OAD FULL ACTIVATION OF CABLE CONVERTER WE STOCK A COMPLETE LINE OF CHIPS TOOLS WIRELESS QUICK INSTALL TEST BOARDS AND DIAGNOSTIC CUBES FOR ALL CONVERTERS k ANYONE IMPLYING ILLEGAL USE WILL BE DENIED SALE WE SELL PRODUCTS ONLY To TECHNICIANS OR CABLE REPAIR FACILITIES 1 IN CUSTOMER SERVICE amp TECH SUPPORT ALL ORDERS SHIP WITHIN 24HRS UPS FED X PRIORITY NEXT DAY SHIPPING AVAILABLE SALE BUY 5 TEST BOARDS AND GET FREE MON FRI 8SAM 7PM SAT 10AM 2PM EST WEB PAGE HTTP WWW 800 GOCABLE com ae Ge VISUAL FB 6 COMMUNICATIONS me ORDERS CATALOG 1 800 GO CABLE TECHNICAL SERVICE DEPT 717 620 4363 EST 1976 FILTERS WS mr BE AN ELECTRICIAN Home study Maintain and install electrical J systems wiring utilities phones and more FREE LITERATURE 800 223 4542 Name Age Address City State The Electrician Sehe School PCDI DEPTTEN341 6065 Roswell Road Atlanta Georgia 30328 qm GP GP a GP a ee a a Phone Test Instruments Equipment Tools amp Supplies For Electronic Production Maintenance amp Service 8931 Brookville Road Silver Spring MD 20910 800 638 2020 Fax 800 545 0058 CIRCLE 47 ON FREE INFORMATION CARD WHOLESALE PR
201. ew grandparents all the aunts and uncles and family friends Wherever they might live they d be able to see the baby as soon as they turned on their computers If you have a Web page you could post a photo for everyone on the Internet to see And perhaps after getting some much needed sleep you could create your own custom birth announcements incorporat ing one of those photos Beginning to wonder why you re hang ing onto your old 35mm job Don t shelve it yet Digital cameras are begin ning to make inroads but they re not going to replace standard 35mm cameras any time soon That s because there are a few major drawbacks to the format First within reach doesn t mean cheap Digital cameras are now available for less than 500 Similarly equipped point and shoot 35mm cameras can be bought for well under 50 often under 25 even under 10 for a disposable one Second the potential market is limited to computer users Some digital cameras are equipped with or offer as options LCD screens for immediate viewing But to take advantage of all they have to offer you must have a PC That immediately eliminates as potential digital camera buyers the 60 70 of U S households that somehow manage to muddle along without a computer That percentage does drop to around 50 if you take into account only those households with chil dren which are the ones most likely to be taking pictures anyway Third
202. f am not satisfied may return the book s within 30 days for a full 100 refund of the purchase price Cl my payment is enclosed I ve deducted 10 If am ordering by 7 31 97 SOA f C Check Enclosed C Optional express delivery available in U S only Enclose an additional 10 and we ll guarantee delivery within 5 business days from receipt of your order prepaid orders only no P O Boxes f O Bill me later induding 6 50 shipping and handling per book subject to credit approval Signature and phone number required to process your order P 0 Box addresses must be prepald Signature required a 1 Daytime phone i e Mi ee f company ae ee ee eee l Street Address City State Zip tl Shipping and handling to Canada 10 U S Currency Overseas 15 foreign orders must be prepaid CT residents add 6 sales tax Supplements wiil be sent 4 5 times a year on a fully guaranteed 30 day trial basis They may be cancelled at any time MAIL TO WEKA Publishing Inc i 1077 Bridgeport Avenue P O Box 886 Shelton CT 06484 fall 1 BOO 222 WEK A or fax to 1 800 56 5915 for fast semie sojuoljoaly seindog Z664 Aine oS ice Popular Electronics July 1997 PC based Front Panel Access Computer 7 11 PC 24 hour Working Computer from 600 vee ant For Computer Telephony Server or mm ie gt Home Automation or Network Computer Fanless compact size 9 0 W 7
203. f internal RAM No provision is provided for exter nal image storage cards when the internal so1uoljoe 3 seindog 7661 ANF nN Ww Popular Electronics July 1997 nN is memory is full you must either erase some of the stored images or download them to a PC When the high resolution mode is selected an HQ icon appears in the control panel there 1s no icon in standard mode The pictures remaining count changes when you change modes For instance you might have four pictures left in standard mode but just one if you switch to HQ In high quality mode the picture resolution is 640 X 480 pixels in standard mode it is 320 x 240 Had our friend managed to tum the camera on properly and figure out how many shots she had left she might still have had trouble with the SHUTTER RELEASE button Taking a picture is a two step process The button must be de pressed halfway first and then fully to release the shutter and snap the shot The D 200L captures images at shutter speeds of up to 1 10 000 second The camera beeps twice to let you know the shot was taken and a writing indicator appears in the control panel to show that the image is being transferred to memory After about six seconds in HQ mode or two seconds in standard the indicator dis appears and the camera is ready for the next picture You can use either the optical view finder or the LCD monitor to frame your photos The manual suggests usi
204. f waveforms The latest models include the PM 3384B and PM 3394B which are 4 channel models with 100 or 200 MHz band width and the PM 3370B PM 3380B and PM 3390B 2 channel models with bandwidths of 60 100 or 200 MHz For repetitive signals the PM 3390B and PM 3394B have a random repeti tive sampling mode that results in an equivalent sampling rate of 25 GS s 10 GS s on the 60 and 100 MHz models That mode allows users to view repeti tive signals at a much higher resolution than is possible with more traditional sampling methods A Single shoot sam pling rate of 200 MS s is standard on all models The four channel models have 32K deep memory as a Standard feature allowing users to scroll time windows several screens wide for convenient viewing of all single shot events The memory can also be used to study a single screen time window acquired with greater time axis resolution and zoom in to study a particular area of a waveform All five CombiScope B Series DSOs offer a multiple signal shot mode which lets users capture a series of single shot waveforms and automatically store them for later analysis or Comparison The feature makes it possible to find all the malfunctions that occurred during long term monitoring without constantly having to watch the screen All models also feature add sub tract and multiply mathematical pro cessing The Fluke Math package adds advanced mathematical process ing of wavef
205. feature of the Used Vehicles section is the Blue Book Values link This is the online version of the Official Kelley Blue Book used to obtain vehicle price information Simply enter the model make and year of the car then answer some questions about how many miles the vehicle has what features it con tains and so on In the blink of an eye you can receive one of two values either the trade in value of your Car or what it s worth if sold privately Free Ads lets you actively become a soiu0sjoa 3 seindog 2661 Ainr _h w Popular Electronics July 1997 oh amp Da T ore an coro adie 1397 aes ye hie 4e5 aes 9 O A E P 12s Stop Rstegh Home sions atten Serra ete nara et eevee otc Passenger 2 Body Aluminum alloy and layout composite material with autoclave technology Transmission 5 speed manual Wheelbase 1043 Length 175 67 Height 43 5 Width 80 3 Displacement 5 7 liters Wheeis Ajuminum front 8 5 x17 Aluminum rear 13 17 Tires Pirelli PZero front 245 40 Z2R17 Pirelli PZero rear 335 35 ZR17 Steering Manual rack and pinion Brakes Power Vacuum H System Four wheel discs front 12 99 rear 11 2 E Eege g ae Rar avano DOHC j Marrs cit ninme Ex a Ay Prat lores Fone Mal Wireline you re in the mai ket r for a LAET ghini or a AIRE AiltaWeb can help you fi find the car that s right for you part of the trading that s always go
206. fident you will love its performance that we back every copy with our iron clad satisfaction guarantee TraxMaker 2 The Most Affordable Professional Quality PCB Design Tool TraxMaker is a Printed Circuit Board PCB layout program with advanced fea tures Such as a built in autorouter 8 layer capability support for surface mount devices and full design rule checking Most importantly TraxMaker provides these features while remaining exceptionally easy to use TraxMuaker is a truly cost effective package which is sure to handle your most demanding PCB design tasks TraxMaker can be used us a stand alone product or with compatible schematic capture products When used in conjunction with CircuitMaker TraxMaker completes a powerful start to finish circuit design sys tem TraxMaker provides more power than any other product in its class CircuitMaker CBT Electronics Training Featuring An Award Winning Curriculum MicroCode Engineering and Lab Volt Systems present CircuitMaker CBT com prising 28 analog and digital lessons organized into four modules covering DC Concepts AC Concepts Analog Device Concepts and Digital Device Concepts This is not another one of those textbooks on a computer rather it is an interac tive presentation in an intuitive multimedia CD ROM format providing over 200 virtual labs simulated in CircuitMaker The award winning curriculum provides the most powerful teaching learning tool for electronics
207. fire emergency marine and weather channels There are ten priori ty channels The internal memory back up will hold programmed frequencies for more than three days without power The scanner s suggested retail price is 429 95 Marines to the Rescue Now is the time of year when the marine channels are at their most active and interesting If you are moni toring within earshot of a coastline navigable river inland waterway or large lake why not tune up on at least some of these channels Pleasure craft yacht clubs mari nas and the like literally swarm on 156 425 156 475 156 50 156 55 156 875 156 95 156 975 and 157 025 MHz Try 156 45 MHz as the calling channel Commercial craft including ferries tugs water taxis tankers ore carriers harbor pilots etc can be heard on 156 30 156 35 156 375 156 40 156 50 156 55 156 875 156 90 156 95 156 975 and 157 025 MHz Try 156 45 MHz as the calling channel Vessels report emergencies to the Coast Guard on 156 80 MHz and are usually asked to switch to 157 10 to continue their communications The Coast Guard can be monitored on 156 60 157 05 157 075 and 157 15 MHz The Coast Guard Auxiliary uses 157 175 MHz Near large commercial harbors monitor 156 275 156 30 156 325 156 60 156 65 156 675 156 725 and 157 00 MHz Some harbor police use 156 85 MHz Vessels requesting that canal locks or drawbridges be opened Continued on page 79 ne d
208. fore the Morse code section and put a label at the top of the program top At the end of the Morse code section just said jmp top Now was cycling through the Morse code returning to the top of the program waiting for 25 sec onds and hitting the Morse code again and so on could fiddle with the timing once got all the bugs worked out but at least now had the hard part of the program done Of course still hadn t turned the transmitter on or off but did have Fig 3 Technological Arts produces a vari ety of plug in carriers that make perma nent installations a snap a few nights left T minus three days and count ing had plenty of time until Saturday but wanted to get things working ahead of time just in case My objective for the evening was the PTT line needed to write a subroutine that would flip an output port high and then flip it low after a delay went back to the DEMO ASM program to see how they did it knew that the 68HC11 used memo ry mapped O This means that the physical 1 O ports are given addresses right along with the memory addresses and that you can read to or write from a port the same way you can read a memory variable As viewed the code the DEMO program used to toggle the B Port lines found that they were using a fairly elegant way of flipping the bits Since the programmer wants to only affect a single bit he can t just write a new variable in
209. g 3 00 512 Alltronics Catalog 2 00 505 Information Unlimited Catalog 2 00 513 Global Specialties Catalog Free 506 Mouser Electronics Catalog Free 514 Test Equity Catalog Free 507 A M C Sales Inc Catalog 5 00 Payment please check one Check C Money Order Total for items selected Service and Handling 1 50 Total Enclosed Name _ AAD E ee a Street a City State Zip a Mail to CATALOG SUPERMARKET P O Box 5110 Pittsfield MA 01203 5110 Void after September 30 1997 9 s91401 72913 seindog 7661 Ajnr 1 You can Build Gadgets Here are 3 reasons why E BP345 GETTING STARTED IN PRACTICAL fessional appearance g BP349 PRACTICAL OPTO ELECTRONIC PROJECTS 5 95 j if you shun opto elec tronic projects for lack of knowledge this is the book for you A bit of in troductory theory comes first and then a number of practical projects I which utilize a range of opto devices from a fil ament bulb to modern infrared sensors and emit i ters all are easy to build Practical Electronic Music Projects E CA ELECTRONIC MUSIC PROJECTS are guitar general music and MIDI Mail to Electronic Technology Today Inc P O Box 240 Massapequa Park NY 11762 0240 Shipping Charges in USA amp Canada 0 01 to 5 00 2 00 30 01 to 40 00 6 00 5 01 to 10 00 83 00 40 01 to 50 00 7 00 I 10 0
210. g your printer to use it or get a switch box that would let you go back and forth between the two Although that sounds like a bit of a has sle we never found it to be Acquiring images and printing them were never things we did at the same time Actually we usually used the Snappy on our notebook computer attached to Our camcorder because most of the images we wanted to capture were found Outside the confines of our office We could have taped the images and then played them back later at our desktop computer But images captured directly from a video camera can have higher res olution than those taken from tape We ll discuss resolution in more detail no pun intended later What we did find to be a hassle was Snappy s size it s a wee bit too fat Although we had no problem connecting it tO most computers we did run into trouble on some computers with tightly spaced jacks on their rear panels In one instance we had to remove the serial cable to get Snappy to wedge in beside the video cable Getting to the back side of a computer is usually a bit of a job in itself because of all the cables Trying to wedge something in just makes it more difficult Of course a short connecting cable could cure that problem Snappy is supplied with software on two CD ROMs The acquisition software serves as the main interface with the device Other software includes Adobe PhotoDeluxe Gryphon Morph and Kai s Power Goo SE
211. get certain local stations in clearly Now thanks to fifteen years of microelectronics research a new de vice has been developed that actu ally makes conventional antennas a thing of the past It s called the Spectrum Universal Antenna Tuner Advanced technolo gy If you live ina rural area you may have re signed yourself to accept the fact that your local TV reception is poor This may be true even if you don t live ina rural area Now imagine watching TV and seeing a picture clearer than before Simply plug the Spec trum Antenna into a standard AC outlet and plug your TV into the Spectrum Get ready for great reception because your TV will display a clearer focused picture thanks to Spectrum s ad vanced signal controls Uses your home s electrical wiring The Spectrum Antenna is a sophisticated electronic device that plugs into a standard wall outlet Basically the outlet in terfaces the Spectrum with the huge antenna that is your home wiring network Simply put it turns the electrical wiring in your house or apartment into a multi tunable TV reception antenna that will improve your TV s overall tuning capability protected ports How it works Broadcast TV signals are sent out from the local broadcast station Those sig nals interface with your home s AC power line system creating an aerial antenna network of wiring as large as your home itself When the Spectrum Ante
212. hes is shown in Fig 3 The layout is fairly tight with numerous traces routed between component pads That was done so that the completed board would fit into a compact enclosure If you are uncomfortable with that layout or plan to use a different enclosure please feel free to redesign the cir cuit board layout to suit your own needs In any case once the printed circuit board has been etched carefully inspect it for faults such as incomplete traces and copper bridges between traces After cor recting any problems install the components using the Fig 4 parts placement diagram as a guide It is suggested that low profile compo nents e jumper wires and hori zontally installed resistors be installed first followed by the taller units IC sockets capacitors etc sockets are strongly recommend ed for all ICs except the voltage regulator not only do they simplify testing the project but they also make any future IC replacements quick and easy After all of the board mounted components have been installed but before inserting any of the ICs temporarily apply power to the board and confirm that 5 volts DC appears at the output of IC5 Remove power install C1 into its socket and re apply power LED should now start blinking Once again remove power and install y 7 p 2 1 4 INCHES Fig 5 The tone decoder was assembled on a small printed circuit board this one measuring 2 7 6 by 2 174 in
213. hese parts are usually manufacturers over stocked parts that are surplus once a production run finished They are inex pensive Last year picked up a bag of PC board electrolytics that came out to 15 cents per capacitor That s cheap Now all you may need to complete a project are the chip s required From time to time there are good buys listed in the 30 to 40 pages of the Market Center in this magazine Thumb through it today If you don t whip out your check book and buy something you are a stronger per son than am Back to our distressed reader For the most part for the kit of parts list ed in the Parts List for construction projects we publish the prices are good A one source supplier makes buying easy and gets you into the project quickly Whoops Just spotted a 14 95 TV notch filter in the Market Center Gotta go now Where is my checkbook she DA Qa e Tn Julian Martin Editor EARN YOUR B S DEGREE COMPUTERS ELECTRONICS By Studying at Hom Grantham College of Engineering now in our 47th year is highly experienced in distance education teaching by corre spondence through printed materials computer materials fax modem and phone No commuting to class Study at your own pace while continuing on your present job Learn from easy to under stand but complete and thorough lesson materials with additional help from our instructors Grantham offers three separate dis
214. iTa a as an 1 15VDC variable supply is capable of 24A Great for the service bench or ham shack Regular price 215 00 Precision NTSC generator is a must when servicing TVs and VCRs Generates dot cross hatch color raster and color bar patterns Channel 3 4 and composite cutput Regular price 279 00 CODE POP42 CIRCLE 144 ON FREE INFORMATION CARD s91u01 23 3 JeNndogd 7661 ANF co N Popular Electronics July 1997 GI Call fax or email today for your free copy of our test instrument catalog jam packed with the BEST VALUES in test and measurement instruments avail able today Products International TES T INSTRUMENT CA TALOG TI RAR F a 8931 Brookville Rd Siver Spring MD 20810 8006382020 Fx 800 545 0058 2 Email SMPRODINTL aol com CIRCLE 46 ON FREE INFORMATION CARD Pe ee ee a a a a es START A GREAT CAREER IN ELECTRONICS Professional level home study Learn to repair in stall and service consumer automotive and _ commercial electronic devices i You could make excellent money in a re pair shop or service center Or open your own full time or part time business You ll know all about transformers capaci tors diodes resistors digital electronics in tegrated circuits and much more E For your free career literature send or call 24 hours a day CALL NOW 800 223 4542 Name Age _
215. ic C5 0 1 pF 50 WVDC polyester ADDITIONAL PARTS AND MATERIALS XTAL1 3 58 MHz colorburst crystal S1 Miniature SPST toggle switch J1 Male panel mount barrel jack 2 0 mm x 5 5 mm J2 Black binding post J3 Red binding post B1l 9 6 volt battery pack see text Printed circuit materials enclosure IC sockets dark red plastic lens for dis play test leads DC adapter wire solder hardware etc charging indicator lighting only when the battery is being charged Diode D1 prevents the battery pack voltage from appearing at J1 It should be noted that if the battery pack becomes discharged during use the unit can still be used while recharging An ordinary AC to DC power adapter or other suitable 12 volt source capable of supplying at least 200 MA can be used instead TO SO1 sol Sa ae Fig 4 Assemble the tone generator using this parts placement diagram as a guide installing the low profile components i e jumper wires and horizontally installed resis tors first followed by the taller units IC sockets capacitors etc Tone Generator Construction Since the project is a portable test instru ment and is therefore likely to be subjected to somewhat rough han dling in everyday use it is strongly recommended that the unit be assembled on a printed circuit board A full size template of the author s printed circuit board pat tern for the tone generator measur INQ 2 3 3 by 2 774 inc
216. ice that three audio output jacks are provided For local stations and other strong signals the earphones can be plugged directly into the output of the detector tube For weaker signals the listener might plug the phones into the output of the next or first audio tube Where room filling volume is required a loudspeaker would be plugged into the output of the last or second audio tube It s interesting to study the automat ic switching arrangements built into the Continued on page 80 a Audio Fun his month s column is filled with audio circuits from readers Before we get to those letters let s con tinue our discussion about diodes and their uses by discussing alternating current AC With the exception of our discussion on transformers we have mostly talked about direct current DC or current that flows in one direction through a component or conductor To discuss the usefulness of diodes as rectifiers we should start with a defini tion of AC or current which flows first in one direction then another Most often the change in current direction is not sudden but gradual and is caused by a shift in polarity of the voltage source For example household AC is the result of voltage that rises falls and changes direction 60 times a second Plotting this voltage over time results in the sine wave graph shown in Fig 1A The voltage rises from zero at time TO to a maximum voltage at time T1 fa
217. ictures will remain in the camera s mem ory The monitor also performs a couple of neat tricks In slide show mode it auto matically runs through all of the pictures in the order in which they were taken In multi display mode nine frames appear on the LCD monitor at the same time in three rows of three You can even com bine the two modes for a multi image slide show Besides the LCD monitor the D 200L offers a number of features not found on many entry level digital cameras Those include a self timer macro mode and several flash modes The self timer gives you 12 seconds to get into the picture before the shutter is released Macro mode is used for taking close up shots from a range of 0 65 2 46 feet The above is an actual image real size taken with the D 200L in 640 x 480 resolution The D 200L has four flash modes to meet various conditions Autoflash auto matically fires in low light and backlight conditions Fill in flash forces the flash to fire even under bright light conditions when the subject is sitting in front of a sunny window for instance Flash over ride turns off the flash even in low light conditions Red eye reducing mode helps avoid pictures in which the subject s eyes appear to glow red The camera emits a series Of low power flashes which make the subject s pupils contract before the regular flash goes off If you forget to use red eye reduction don t worry You can correct r
218. iew Plus 16 The zip file handler is dynamite Zip over 200 file formats including most common word processing including HTML spreadsheet and graphics for mats The current 4 0 version lacks support for Office 97 file formats but the company is working on it My only complaint is that the program supports Access database files only through version 2 0 which is now two revisions out of date Stiletto Stiletto is an ultra customizable launch bar utility You can easily create JEFF HOLTZMAN buttons to launch your favorite pro grams group programs into menus configure the size and position of the toolbar and configure the size icon and caption of the buttons Each button can have an associated program or menu that can be launched by the left right or middle mouse button With a two button mouse you can simulate the third button by clicking the other two simultaneously It also works with Microsoft s new IntelliMouse Stiletto has an innovative approach to positioning its toolbar You can embed it in one of almost three dozen screen positions or in one of several positions in the title bar of the current application The three applications or menus associated with each button may be listed in a pop up window like a tooltip You can also define button labels to display system information such as time date free memory and free disk space Stiletto also provides an integrated set of functions for gen e
219. ing is available from Nordmende remember Nordmende Robert Back in the 1950s this German firm Norddeutsche Mende Rundfunk KG of Bremen turned out some slick look ing AM FM table model sets during the early days of hi fi radio They fiercely competed with similar looking and sounding Grundig sets also German made Though most people bought them for their FM sound they were all band sets meaning shortwave and they per formed fairly well on the SW bands But too lost track of what hap pened to this once well known brand name So asked receiver guru Larry Magne editor publisher of the well known Passport To World Band Radio Nordmende it appeared as nordMende on the dial made short wave radios at least into the mid 1970s says Larry During that decade the company was taken over by French electronics giant Thomson A few years later Thomson was nation alized by the French government which moved it away from consumer products area and toward govern ment military avionics and the like Today Thomson is being re priva tized but is still effectively controlled by the French government and Nordmende is under the division of Thomson known as Thomson multi media spelled with a lower case m As a brand Nordmende still exists the name appearing on such products as TV sets But haven t seen a new Nordmende shortwave portable in a good 20 years So there y
220. ing on at AutoWeb If you have a car or truck to sell Place a For Sale By Owner ad Looking for a particular automobile and want car owners to come to you Just place an Autos Wanted ad Auto Web makes these ads available for free for private owners Autos Wanted lets you read the ads we just described while AutoTalk lets you find out what s available in a BBS fashion You can also share tips with others or pick up a few pointers from someone else s experience Specials lets you in on hot deals that you won t want to miss Another great interactive feature of this site is the Loan Calculator Most people have a difficult time translating a new Car s sticker price into monthly payments With the Calculator you just enter in three of the following factors to solve for the remaining one the amount of your loan in dollars the interest rate E Lad Cmi ikia LB beri om ImMermnct Laplater redesigned Seville and Eldorado with their amazing Northstar engines have somewhat 1 revitalized this company s ailing image _ Stall getting whooped by the imports Cadillac has once again decided to use a little sleight of hand to entice near luxury buyers Unlike the Cimarron Cadillac s latest offering is based on a car that lends itself to luxury The Catera is sold in Europe through the General Motors morii e e e at i nish Lb T ae edi a rele ae _ ight s
221. is tied in directly to the fuel injection control system Aftermarket emission equip ment could be the ticket for any one who wants to keep an old car whether it is a daily driver or a col lectible environmentally friendly By installing millions of them cities like Cairo Bombay Mexico City and many others notorious for their foul air could be cleaned up ANTIQUE RADIO C Free Sample lt Antique Radio s Largest Circulation Monthly Articles Ads amp Classifieds che 6 Month Trial 18 95 1 Yr 38 95 55 95 1st Class A R C P O Box 802 L18 Carlisle MA 01741 Timid about getting on the World Wide Web You ve heard about the Information Superhighway and all the hype that goes with it Sort of makes you feel timid about getting on the Web Put your fears aside A new book The Internet and World Wide Web Explained eliminates all the mystery and presents clear concise information to build your confidence The jargon used is explained in simple English Once the tech talk is understood and with an hour or two of Web time under your belt your friends will believe you are an Internet guru To order Book 403 send 6 95 plus 3 00 for shipping in the U S and Canada only to Electronics Technology Today Inc P O Box 240 Massapequa Park NY 11762 0240 Payment in U S funds by IS bank check or International Money Order Please allow 6 8 weeks for delivery Phone 508 371 05
222. isks with Cross Assembler and many well documented program examples User s Manuals cover all details over 500 pages Com og and ready to IT use Source code for all drivers and M Everything you need From 279 Money Back Guarantee Advanced Educational Systems PROGRAMMERS ADVANTECH EETOOLS NEEDHAMS DATA VO ICE TECHNOLOGY HILO SYSTEM GENERAL CHROMA MODULAR CIRCUIT TECHNOLOGY XELTEK Fa Fe ll _ PROMAX EMP 20 MEGAMAX MEGAMAX4 SIMM SIP TESTER EMUPA CALL ADVANTECH LABTOOL 599 EETOOLS SIMMAX 629 ICE TECH MICROLV 650 EETOOLS ALLMAX 409 EETOOLS MEGAMAX 509 EETOOLS MEGAMAX4 369 XELTEK SUPERPRO I 409 XELTEK SUPERPRO II P 795 CHROMA SIMM SIP 359 MOD MCT EMUPA R 279 MOD MCT EMUP R 49 EPROM 1G TO 5 2K 59 EPROM 1G TO 1MEG 99 EPROM 4G TO IMEG 199 EPROM 16G TO 1 MEG 89 EPROM 1G TO 8MEG 129 EPROM 4G TO 8MEG 250 EPROM 8G TO 8MEG 249 XELTEX SUPERPRO L 165 XELTEK ROMMASTER I 739 STAG ORBIT 32 R Optional Text Book Call for Free Info Pack or see WEB at hitp www aesmicro com 714 550 8094 FAX 714 550 9941 Call 1 800 730 3232 AES 970 W 17TH STREET SANTA ANA CA 92706 USA Having a machine may not permit you to photocopy books journals newsletters and magazines The Copyright Clearance Center CAN Contact us to find out how you too can COPY RIGHT COPYRIGHT CLEARANCE CENTER 222 Rosewood Drive Danvers MA 01923 C Tel 508 744 3350 O Fax 508 741 2318
223. it rests firmly in place on the LED and photocell The tip of the finger must be in solid contact with the photocell to ensure adequate light transfer Allow sufficient time for the circuit to stabilize LED2 will then blink in synchronization with the subject s heartbeat The pulse rate is easily determined by using the second hand of a watch to count the num ber of flashes that occur in 15 sec onds Multiply that number by four and the result is the heartbeat rate of the subject The normal pulse rate for many adults is about 70 to 75 beats per minute children typically exhibit noticeably higher rates Some peo ple experience an increase in the rate when they know it is being checked After checking the sub ject s normal heart rate you may provide any kind of external stimula tion to see if and by how much it will increase This could be a very enter taining exercise When finished using the Heartbeat Machine always turn power off to conserve the battery A new 9 volt alkaline battery will pro vide more than 40 hours of intermit tent use If the display LED becomes dim or erratic the battery should be replaced E Free Best Seller Write Consumer Information Catalog Dept BEST Pueblo CO 81009 MULTIMEDIA x onthe PC lan A Sinclair pmr AE Tia What is Multimedia What can gee Jit do for you It can do lots of See nice things This 184 page E Me book helps you create your _ y own mul
224. itting lid is also supplied to prevent evaporation when system is not being used Typical etching time is reduced to 4 minutes on 10z copper board REDUCES CATNO DESCRIPTION PRICE ETCHING TIME 12 700 EtchTankSystem 37 95 Removeable Hard Drive Racks The ideal solution for protecting highly sensi tive data Or buy one computer and allow individual users to keep their hard drive with their own applications and set ups Just turn the system off lift the handle and the hard drive pops right out Key lock included to avoid accidental or unauthorized removal includes hard drive activity LED s Rack in cludes mounting hardware keylock front panelLED convenient pull out handle Made from high impact ABS plastic Fits in 5 25 bay Features ideal for Hard Drive Portability Solve Software Data Security Issues Carry Your Hard Drive Between Home and Office Each User Can Have His or Her Personal Hard Drive CATNO DESCRIPTION PRICE specialHDRACK IDE For IDE Hard Drive 14 95 AVA Aol mexelag LE E E E a a Ga a z SEaaaBEa B Digital Panel Meters LCD amp LED Don t let the prices fool you These digital panel meters are not surplus so even if you design theminto an ongoing manufactured product you can be assured of continued availability These high quality digital panel meters are decimal point selectable with guaranteed zero reading atzero volts input Applications Include Specifications PM
225. ixer would be nice for a practicing band Telephone Doorbell Stereo Mute Circuit lt has been a while since have sub mitted a circuit to this column November 1990 issue to be exact entitled Telephone Privacy So it s about time The doorbell stereo mute Circuit in Fig 6 has been in operation at my home now for around two years with no problems My dad gave me the idea as he knocked on my front door for around fifteen minutes while my stereo blasted Well that wasn t too cool so built this circuit The telephone muting portion came from Radio Electronics January 1990 in addition as pointed out in the May 1993 issue of Electronics Now changed the circuit to make it more FCC acceptable When the front or back doorbell is pushed closure of switch S3 or S4 respectively AC flows from the bell transformer through resistor R4 the doorbeil chime the LED portion of the photo SCR isolator IC3 diodes D4 or DS depending which doorbell switch was pushed and back to the bell trans former The current flowing through the LED in IC3 activates the light sensitive gate of the SCR causing it to conduct With the ON OFF switch S1 and RESET switch S2 closed current then flows from the 12 volt power source noted by the illumination of the red LED2 through the switches into LED1 the Stereo Mute Indicator and R2 through the SCR of IC3 and then from the base to the emitter of Q1 to ground Transistor Q1 conducts and
226. ks with a REGULATED 12V power supply 1 1V 13V Hooks up by connectiong three wires red to 12V black to ground power amp video and brown fo video signal output Power Supply Regulating Kit for CA H34 this simple kit is designed to fit onto the back of the CA H34 CCD camera It resolves the problem of hooking up the camera to an UNREGULATED supply which damages the camera by providing safe regulated power from any 12V 14V DC supply It also provides regulated 12V DC from a 12V AC source RECEIVE OUR LATEST 132 PAGE CATA It s chock full of all types of electronic equipment was and supplies We ve got l C s capacitors resistors fas pots inductors test equipment breadboard ing supplies PC supplies industrial computers data acquisition products personal comput ers and computer parts plus much much more FAX us your name and address or call P 5203 ext 5 to leave a message on our catalog request line LOG 0 05 23 5 C lt 80 RH S 91u01 99 3 seindog 7661 ANF te on Popular Electronics July 1997 wo o me Gee ee ese ee ee g 5 i 0 Zenith CABLE DIRECT i ST 1000 s a 0 u s l pii CONVERTERS 25 00 yee ie en SESCRAMELERS i 2 f aie a ae iT Ra i 1 0 Be ee eee ee ius OO Zenith Jerrold 1 Tocom i Pioneer i Panasonic The clearest picture possible amp id SUPER V playing back movies Scientific Atlan
227. lable in Guided Activities Modify Photo allows you to unleash your creativity You can edit the photo cul copy paste duplicate or delete it or delete the background only Several tools are available including a paintbrush color change lines text an eraser and smudge You can change the orienta tion of a photo by rotating it left or right and flipping it horizontally or vertically And you can even modify the size of the image trim it distort it or change its per spective Digital photographs often require quite a bit of touching up which is easily accomplished after you click on the quality folder Two automatic options are available instant fix and sharpen The color balance brightness contrast hue saturation and lightness can be changed manually It s even possible to remove any dust or scratches from the photograph Once you have your photos in good shape you can select the effects folder to have some fun It s possible to outline your subject to distinguish it from the background and then change the back ground to a solid or gradiated color You can draw an oval circle rectangle poly gon Or square around the subject or out line it freehand which is a bit difficult rather like using an Etch a Sketch You can also erase any part of the image Select areas to move around or change the entire image to black and white Special Effects gives you the same Kai s Power
228. le taking the Speed Learning program is Why didn t someone teach me this a long time ago They were no longer held back by their lack of skills and poor read ing habits They could read almost as fast as they could think What makes Speed Learning so successful The new Speed Learning Program does not offer you a rehash of the usual eye exer cises timing devices and costly gadgets you ve probably heard about in connection with speed reading courses or even tried and found inef fective In just a few spare minutes a day of easy reading and exciting listening you discover an entirely new way to read and think aradical departure from anything you have ever seen or heard about Speed Learning is the largest selling self study reading program inthe world Successful with Fortune 500 corporations colleges government agencies and accred ited by 18 professional societies Research shows that reading is 95 thinking and only 5 eye movement Yet most of today s speed reading programs spend their time teaching you rapid eye movement 5 of the problem and ignore the most important part 95 thinking In brief Speed Learning gives you what speed reading can t Imagine the new freedom you ll have when you learn how to dash through all types of reading material at least twice as fast as you do now and with greater comprehension Think of being able to get on top of the ava lanche of newspapers magazines and corre
229. least Multi channel trunked 800 MHz radio systems are now becoming very popular in the public safety business and other radio services Using stan dard scanners monitoring enthusiasts have found it extremely difficult if not altogether impossible to track a con versation as it shifts from one frequen cy to another within a trunked system s repeaters With a standard scanner you need to initiate a new search each time the conversation breaks and the channel switches You could end up in another conversation and by the time you find the one you wanted you might have missed most of the traffic But the BC235XLT follows the conversation from channel to channel The BC235XLT can track Type I and Ili as well as hybrid systems There are ten trunking banks You pro gram the repeater output channels for a particular trunked system into one of the banks which will accommodate up to 30 channels Program the system type Type ii sort of the default or Type I If Type is selected then you can enter the individual fleet sizes and start locations or you can select from 16 preset fleet maps For hybrid sys tems you enter all of the Type and Ili fleets and everything else will be Type ll This is rather a nuisance if you don t know the fleet map for a particular sys tem but most now are Type Il and as time goes on you ll be better able to figure out the fleet maps Once the scanner is programmed select trunked m
230. les work just like directories so you can click on a zip file to view its con tents and drag and drop files into and out of zip files directly The handler even operates with nested zip files although in a slightly awkward fashion QuickView Plus QuickView Plus is a file viewing utili ty that functions with either or both the Windows Explorer and Mijenix Explorer Plus The program supports Pita CI ere Gee Ta wam e TERE ere el TE r A aise f dates fll ans ee aE cote Sy oer re aFercterparet PIP tarda re PEL Ges segs My two favorite Win95 NT utilities The large window is Explorer Plus from Mijenix Corporation It has built in zip file handling a wealth of sorting options and extensive customizability Stiletto is the small rectangle on the right It allows me to create my own program launchbar in the size and position I want lets me use all the mouse buttons to select different options and even displays launch programs as tooltips finder a disk space display and man agement utility and the star of the show Explorer Plus which is unequivo cally my most used utility Explorer Plus Starts where the Windows Explorer leaves off Highlights include better file sorting options multiple windows built in zip file handling extensive cus tomization options built in launchbar access to a one line DOS prompt view ing pane for seeing file internals and for even better file viewing tight integration with QuickV
231. level of the signal entering your television It delivers a 10 fold greater signal which will bring rich er color and a noise free picture By using the Gain Booster Spectrum s fine tuning controls will function better giving it a stronger signal to tune It also works in conjunction with your outdoor antenna Risk free The Spectrum Antenna Tuner comes with our 90 day risk free trial as well as a 90 day manu facturer s warranty Try it yourself and if you re not satisfied return it for a No Questions Asked refund Limited time offer We realize that most people have more than one TV in their home That s why we re offering a spe cial discount on additional Spectrum Antennas so you get great reception on all your TVs Spectrum Antenna 39 4 S amp H Additional antennas jusSt 34 S amp H free Gain Booster 000 00 00oce eee 19 2 S amp H Please mention promotional code 2154 10812 For fastest service call toll free 24 hours day 800 230 5023 comtbradincustries 2820 Waterford Lake Drive Suite 102 Midlothian VA 23113 CircuitMaker Schematic and Simulation TraxMaker PCB Layout and Autorouting CBT Computer Based Training eS eee Somplote Virtual Electronics ab HOLM eae fA lH an ie Sd t vee ERHI W pe ai We At the completion of this unit you will be able to d termine the input output relationship of AND NAND OR and NOR logic gates by using Ihe D
232. lls back to zero at time T2 and changes polarity as it falls to a negative maximum voltage at time T3 and then rises to zero again at time T4 For household outlets this cycle occurs at 60 times a second or 60 Hz If the resistor of Fig 1B is exposed to such a voltage source the current through the resistor would rise and fall as shown in Fig 1C While motorized devices such as blenders electric can openers shop equipment etc are designed to run directly from AC current many elec tronic devices require DC Why do power authorities use alternating cur rent and voltage to transmit electrical power The main reason is it can be transmitted over long distances with VOLTAGE VOLTAGE SOURCE D1 1N4148 D2 CURRENT T1 1N4148 Fig 1 Faster than you can blink your eyes a household alternating voltage A com pletes 60 of these cycles in a second B When resistor R is connected to this voitage source alternating current flows in C AC flows in the same time relationship as the voltage Source heatsink these devices JOHN Jd YACONO Lap TESTING COORDINATOR Windows MAGAZINE much less loss than DC Electrical utili ty power is also sent out at much high er voltages than required for most devices Again that increases the effec tive distance you can transmit the power Before it comes into your home this voltage is reduced by a distribution transformer to 117 volts AC actual
233. longer or lighter Standard size batteries currently dominated by NiCd cells particularly 9 volt standard cells could easily be soiu0sjoe 3 seindog 7661 ANF n Popular Electronics July 1997 an co replaced by lithium manganese dioxide rechargeables due to their low cost and low environmental impact Sony and Sanyo are already marketing cellular phones and camcorders with lithium ion batteries Toshiba and Dell have laptop computers with lithium ion batteries on the market The lithium ion batteries are also attractive to aerospace and defense contractors Their high energy density and potentially long life offers significant advantages to satellite technology where launch weight is critical Not only will they last four times longer than conven tional batteries but more instru ments can be designed into satel lites Lithium is a desirable anode material for rechargeable batteries because of its high energy density Non rechargeable lithium batteries have been available for years but rechargeable lithium technology has been hampered by the elec trode position of lithium metal dur ing charging During recharge lithi um metal is prone to form den drites metal whiskers that tend to short the electrodes Those shorts limit the number of charge recharge cycles of the battery The shorts also induce a fire risk The development of the lithium ion cells based on lithium intercalation materials
234. ltage tran sients The battery pack used in the author s prototype is made up of eight individual 800 mAh AA cells wired in series The battery pack PARTS LIST FOR THE TONE GENERATOR SEMICONDUCTORS IC CD4011 or similar quad 2 input NAND gate integrates circuit IC2 C 4520 or similar dual binary up counter integrated circuit 1C3 TPS088 DTMF generator Digi Key TPS088N ND integrat ed circuit IC4 C D4067RE or similar b6 chan n l analog multiplexcr demulti plexer integrated cirewii IC5 LM78L05 3 volt 100 mA voltage regulator integrated circuit LEDI Red T 1 sive light emitting thode RESISTORS All fixed resistors are watt 5 units 1 470 000 ohm R2 0 ohm 23 10 000 ohmi CAPACITORS Cl C5 O 1 yF 50 WVDC polyester Hirm C2 1 nF 30 WVDC miniature electrolytic C3 teak 16 WVDC miniature electrolytic C4 00 uF 6 3 WVDC miniature electrolylic ADDITIONAL PARTS AND MATERIALS XTALI 3 58 MHz colorburst crystal Mouser 520 HCLSS7 17 of sit iar SO1l Female DR 25 socket Bi t volt transistor battery Sl See text Printed cireuit board materials alligator clips male DB 25 connector IC sockets battery clip wire markers R S 9278 1650A4 enclosure B S HI7O 211 wire solder hardware enc allows the project to operate for about 8 to 10 hours per charge The prototype unit draws about 80 mA in standby display blank and
235. ly two supplies at 117 volts each Next month we will discuss how that voltage is reduced further by transform ers in most electronic devices and how diodes help convert that to DC But now it s time for the letters Twenty Watt Audio Amplifier This push pull amplifier circuit of Fig 2 uses two TO 220 monolithic Darlington transistors to produce the audio output Frequency response is flat within 1 dB from 30 Hz to 200 kHz with typical harmonic distortion below 0 2 One other transistor is needed a 2N5961 to provide voltage gain for driving the Darlington pairs The input signal must reach 1 2 volts for a full 20 watt output into an 8 ohm 1500 70V SE9401 SPEAKER GND m j Fig 2 This simple inexpensive audio amplifier delivers a punch of 20 watts An equiva lent Darlington pair to use is SK3180 for IC1 and SK3181A for 1C2 and don t forget to 65 s31u01729 3 seindog 7664 Ain Popular Electronics July 1997 load The input resistance of the source is 10 000 ohms Alex Belenky Brooklyn NY Very nice Naturally heat sinks are required for Darlingtons and typical input signals will need some pream plification The trimmer potentiometer needs adjusting to prevent distortion Amplifier Built With One Integrated Circuit After seeing the various amplifier cir cuits walkman amps preamps etc featured in your column thought it might be fun to build a power amplifier circuit The circuit ca
236. me up with is shown in Fig 3 and is surprisingly sim ple it is based on the LM383 8 watt audio amplifier integrated circuit This IC needs only a few additional compo nents and a heat sink to make a high quality 8 watt audio amplifier This cir cuit is a perfect match for simple one or two transistor preamps used in a PA system or intercom If you have a portable CD player you could build two of these and use them with some good speakers to get very high quality sound 9TO 18V C3 Fig 3 This one chip amplifier is the perfect circuit for any portable audio application The low current consumption only 45 mA makes the amplifier very port able and compact didn t include a vol ume control because wanted the amplifiers volume to always be full out I m sure a 100 ohm potentiometer connected to the input would do the trick Aaron Cake London Ontario That is nice and simple If you re going to build a stereo version of the cir cult with the recommended 100 ohm volume control make sure the poten tiometer is a stereo dual ganged unit Guitar Practice Amplifier ve found that the most challenging aspect of amplifier design is avoiding 60 Hz noise The power amplifier rarely adds much power line noise so the preamplifier is usually the culprit Typical common emitter transistor pre amplifiers seem to add the most noise with op amps being not far behind recently decided to try the LM382 low noi
237. memory per channel 300MH2 equivalent time sampling Pre trigger capture a ey 869 95 100MHz THREE TRACE ImVidivielon sensitivity Model 2190A sweeps to Snaidivision Dual time base apg IaM Signal delay line i ci a2 15KV accelerating voltage ES 1379 95 60MHz 40MHz 25 30MHz ps 603 1350 s 1345 569 ps 303 1095 Analog Digital Storage Analog with Delayed Sweep Analog Digital Storage e 20MS s Sampling Rate s 1340 475 1330 439 e Analog e 25MHz Analog S 1360 749 Delayed Sweep Analog with Delayed Sweep S 1325 325 e 25MHz Analog 60MHz DUAL TRACE a ImV division sensitivity Model 2160A sweeps to Sns division a Dual time base Signal delay ine a mode displays two signals unte laied in frequency Component tester 49 95 40MHz DUAL TRACE Model 1541C Video sync separators Z axis input Singia Sweep Se y mode displays two signalis unte lated in frequency on S6 60MHz CURSORS amp READOUTS DUAL TIME BASE Cursora and readouts Model 2260 tmvidly sensitivity 23 calibrated ranges main lime base 49 calibrated ranges Getayed time base Signal delay time V mode displays 2 signals unre OSCILLOSCOPE SELECTION CHART ANALOG Model Bandwidth Sensitivity No of Sweep Rate Delayed Video Component Beam Time lated i frequency Component tester
238. microphones were principally employed the characteristic impedance of most moving coil assemblies the input resistor in each case was a 51 ohm unit A feedback resistor of 100 000 ohms provided optimum gain to drive Continued on page 76 RIGHT ai LEFT ieee OUT LEFT CHANNEL OUT RIGHT CHANNEL s91u01 99 3 seindog 7664 ANF om j Popular Electronics July 1997 S Circuit Circus ICs that Oscillate n our last visit we looked at a num ber of basic oscillator circuits using transistors and logic gates as the active elements This month we are going to continue on with our oscillator lesson and take a look at several oscillator cir cults using ICs that are designed for a variety of different applications Tee C2 001 ak ohm and 25 000 ohm The oscillator s frequency tuning range with a poten tiometer for R4 is about ten to one Very low frequency operation is pos sible if a good quality low leakage elec trolytic capacitor is used for C1 Using a 47 uF capacitor results in a variable frequency range of about 1 Hz to 10 Hz A 12 sal U L OUTPUTS a ANAN Fig 1 Using a NE566 VCO IC to produce square and triangle wave outputs PARTS LIST FIG 1 CAPACITORS a Ci See text C2 0 001 uF ceramic disc C3 0 1 UF ceramic dise RESISTORS All fixed resistors are awati 5 units unless otherwise indicated 5 Ri 1000 ohm R2 10 00
239. minus nineteen days but at least had some direc tion in fox building Over the next several days decided to do some research on the 68HC811 microcontroller so could get right into the thick of things when the ADAPT 11 arrived went to the public library then the college library and struck out in both places What was looking for was a complete foxhunt transmitter control program ready to down load into any 68HC811 microcon troller About a week passed and did not think the project much However noticed that whenever did think about it was overcome with a vague feeling of gloom and despair One night came home from work and found a small parcel in the mailbox Sure enough it was from Canada Technological Arts But the box was only about 5x9 x1 inches maybe this was just the documentation opened it up and found that this was indeed the whole order the microcontroller board a mere 2 X 3 inches a cou ple of cables a 3 5 inch disk a Motorola Programming Reference Guide a User manual along with data sheet and schematic from Technological Arts Hmmm I had to be at a meeting that evening but quickly popped the disk into my computer A few ARC files some ASM files a few BAT files nothing like CW EXE or FOXHUNT TX flipped through the ADAPT 11 User s Guide just a few notes on how to down load files to the board grabbed the Programming Reference Guide memory maps
240. mote Control amp Parental Guidance Feature Volume Control is also available e All Equipment is fully guaranteed amp comes with a 30 day money back option For More Information Call Us 24 Hours a Day At 800 332 1996 FAX 813 376 7801 ROBOTIC MACH ITNING T ROUTE MILL DRILL CARVE ENGRAVE PAINT IN WOOD PLASTIC VINYL PC BOARD amp LIGHT METALS e 4 amp 5 MOTOR GANTRY MILL CONFIGURATIONS PC COMPUTER CONTROLLED CNC DNC IMPORT EXPORT FILES TO OTHER CADS AUTO BACKLASH COMPENSATION PRE MACHINED HEAVY CASTINGS SIMULTANEOUS 4 AXIS MOTION FREE 3D CAD CAM SOFTWARE AVAILABLE IN KITS OR ASSEMBLED EXPEDITE SERVICE ALSO AVAILABLE OPTIONAL ALUMINUM WAY COVERS 0005 RESOLUTION AMERICAN MADE STARTING AT 695 00 3 amp 4 AXIS UNITS FROM 12 X 12 TO 66 X 66 MACH AREA U S CYBERLAB INC 14786 SLATE GAP RD biol PORA AR 72774 ICAL NOW FOR INSTANT SPECS 501 839 8293 24 HR FA ABACK sooo seindog Z664 ANF o Oo Popular Electronics July 1997 INTERNET NEW PY RTaNT 5 Fi I org LOWER Net cons and trauds e design build modify repair consult on SECRE ii PRICES now rake in 2 Billion an l any device system process project elec nually Most are done with little fear of prosecution a aes Sa T Detailed countermeasures nic computer mechanical optical eg phone auto security Radionic lab ene y CONS UMER TR ONI CS radar ultrasonic
241. n CT 06473 Georgia Norman s Electronics Inc 3653 Clairmont Road Chamblee GA 30341 Ilinois Tri State Elex 200 W Northwest Hwy Mt Prospect IL 60056 Maryland Mark Elec Supply Inc 5015 Herzel Place Beltsville MD 20705 Amateur Radio Center 1117 West 36th Street Baltimore MD 21211 Massachusetts U Do It Electronics 40 Franklin Street Needham MA 02194 Purchase Radio Supply 327 East Hoover Avenue Ann Arbor MI 48104 The Elec Connection 37387 Ford Road Westland MI 48185 Minnesota Acme Electronics 224 Washington Avenue N Minneapolis MN 55401 Missourt Gateway Electronics Of MO 8123 25 Page Blvd St Louis MO 63130 William Elec amp Ind Supply 803 Davis Blvd Sikeston MO 63801 New Jersey Lashen Electronics Inc 21 Broadway Denville NJ 07834 New York Sylvan Wellington Co 269 Canal Street New York NY 10013 R amp E Electronics 4991 Rt 209 Accord NY 12404 Unicorn Electronics Valley Plaza Johnson City NY 13790 Philcap Electronic Suppliers 275 E Market Street Akron OH 44308 Oregon Norvac Electronics 7940 SW Nimbus Avenue Beaverton OR 97005 Pennsylvania Business amp Computer Bookstore 213 N Easton Road Willow Grove PA 19090 Texas Mouser Electronics 2401 Hwy 287 N Mansfield TX 76063 Tanner Electronics 1301 W Beltine Carrollton TX 75006 Electronic Parts Outlet 3753 B Fondren Houston TX 77063 GMD Electronics 2625 S Loop Hw
242. n out puts a distinct 4 bit binary number for each decod ed DTMF digit The decod ed data is applied to DISP1 a TIL311 hybrid dot matrix LED display where the data is translated into its corresponding hexa decimal character and to illuminate the readout When ICI decodes a DIMF digit a DV data valid signal output at pin 12 signifying that the cur rent binary output is cor rect The DV signal divides along two paths In the first path the DV signal is then inverted by transistor Q1 and is used to clock the binary data into DISP 1 In the other path the DV sig nalis used to activate half of a 4538 dual monostable multivibrator IC2 which is configured as a 0 9 second timer The output of IC2 at pin 6 a 5 volt pulse is fed to the base of Q2 The pulses generated by IC2 causes Q2 to turn on pulling the base of Q3 low causing it to turn on When Q3 turns on power Is supplied to DISP1 for 0 5 seconds thereby allowing the hexadecimal character to be displayed After 0 5 seconds has elapsed the display goes blank That arrangement not only extends battery life consider ably but also prevents incorrectly or erroneously identifying the con ductors Power for the decoder circuit is supplied by a 9 6 volt Ni Cd battery pack Bl Battery voltage is fed through S1 to C3 an LM7805 5 volt l amp voltage regulator to pro vide regulated 9 volt power source for the project Capacitors C3 C5 filter against vo
243. n the go If you ve never been satisfied with what palmtop PCs have offered in the past you might want to take a new look at the Cassiopeia g soluosjoa y Jeindog Z664 N Popular Electronics July 1997 rN HEARTBEAT MACHINE Continued from page 46 bleshoot the circuit by checking the voltage at pin 8 of IC2 c It should be about 5 volts when the photo cell is completely dark with no vari ation of ambient light striking it When the subject s finger is in place the voltage should switch back and forth between zero and five volts If not check R10 R13 and IC2 c If LED2 is inoperative check its polarity or try a new LED The opera tion of IC3 can be checked by manually triggering it with a momentary short between pin 2 and circuit common Each time that pin 2 is shorted pin 3 should go to COMMON WIRE TO TRANSDUCER TO COMMON GROUND Using four inch spacers with 2 56 or 4 40 machine screws and nuts secure the boards together Drill holes on the bottom of the enclo sure to accommodate the four screws of the assembly Temporarily assemble it to the enclosure with four spacers and nuts Once the assembly is properly positioned in the enclosure determine the loca tion of the hole required for the sub ject s finger to rest on the transduc er Then remove the assembly and drill or cut a hole which is just large enough to accommodate your fin ger Remember the hole should be as small as practical
244. ncreases in both the speed at which you read and in the amount you understand and remember You must be delighted with what you see or you pay nothing Examine this remark able program for 15 days If at the end of that time you are not convinced that you would like to master Speed Learning simply return the program for a prompt refund See the coupon for low price and convenient credit terms RISK FREE ORDER FORM _ YES want to try Speed Learning for 15 days without risk Enclosed is the first of 4 monthly payments of 32 25 If I m not completely satisfied may return it for a prompt refund _ SAVE 8 00 prefer to pay the 129 00 now and save the 8 00 shipping amp handling charge may still return the program for a full refund Method of payment Federal Tax Deductible Check or money order payable to Learn Incorporated MC Am Ex O Discover Charge to _ Visa Card Fe aa Exp Signature Phone Address city Pius 8 00 shipping and handling U S funds only For New Jersey residents sales tax will be added learn Dept LPE 01 113 Gaither Drive INCORPORATED Mt Laurel NJ 08054 9987 Name State Zip s 31U01 98 3 UBINdOY Z661 Ajar Popular Electronics July 1997 amp Editorial Pandora s Part Box Obtaining parts for a project can be a problem received a letter from a reader who was distressed beca
245. nd CD ROM drives Regardless of how long you ve been a ham and how much or how little com puter experience you have this book will come in handy Organized to cover the most common uses of PCs in the ham shack the book opens with a few basic definitions followed by discus sions of PC hardware and software It explains how to choose an operating system and the computer accessories that are right for you The next chapter looks at the PC as a communications terminal that can get you on packet RTTY AMTOR SSTV and many other digital modes with just software and a simple interface Continued on page 73 Photography s Future Gizmo zooms in on digital cameras It s 4 A M and you ve just left your wife and brand new baby sleeping sound ly at the hospital You phoned family and friends hours ago with the good news and basic statistics Now the house is empty and you re just too wired for sleep Too bad there are no one hour photo places open so that you could see the first pic tures of your newborn If you had snapped those photos with a digital camera you wouldn t be at the mercy of any photo developer your PC could serve as a desktop darkroom You could download those pictures to your computer and be able to view them al most immediately A digital camera is like an electronic Polaroid but with some high tech advan tages For instance you could e mail those electronic images to both sets of n
246. ndex finger firmly on the LED and photocell Apply power and wait until the circuit set tles down Note that LED2 blinks for 49second at a rate that is synchro nized with your pulse If LED2 flashes reliably with your pulse rate the sensitivity control may be left in the maximum clock 1 11 16 INCHES Fig 4 This full size template of the authors printed circuit layout for the amplifier board can be lifted from the page and used to etch your own printed circuit board Or if you prefer an etched and drilled board is available from the source given in the Parts List wise position If the circuit seems to be too sensitive set the control slightly CCW to reduce sensitivity Try the circuit on more than one person if possible If the Heartbeat Machine operates normally proceed to the final assembly Otherwise trou Continued on page 84 f 4 Ae EFEFEF ie ef SF EFT e a EENS ua E Co ie rep oy i A pp f SN ed pee ANDME PHZANT FT Rather than forcing people to junk those old smoke generators electronics manufacturers are now producing retrofit emission control systems to help older vehicles comply with the new clean air standards ow that new vehicles have N become extremely clean running greater attention is being focused on cleaning up the emissions produced by old cars and trucks Those gross emitt
247. ng the standard viewfinder because it s easier to hold the camera steady when it is pressed up close to your face Besides using the LCD runs down the batteries faster The LCD is really intended to view the photos that you ve just taken With the lens cover closed a press of the green ON OFF turns on the monitor The last pic ture taken appears on the monitor scrolling down from the top line by line until it fills the screen The frame number and battery power indicators are also dis played If you selected high quality or protection mode or set the date when you took view the pictures those indicators will also be shown Pressing the PREVIOUS button moves you backward through the pictures the NEXT button moves you for ward If you want to be sure to keep one of the images you can press the PROTECT button while that image is displayed in the monitor A second press of the button cancels protection If you don t want to keep a picture and that picture isn t being protected pressing first the ERASE button and then the ERASE OK shutter release button will permanently delete that pic ture Suppose your child got his hands on the D 200L and used up its entire picture memory taking pictures of the floor the ceiling and his shoes You can easily erase all of the pictures in one fell swoop by simultaneously pressing the ERASE and the FLASH buttons and then pressing the ERASE OK button to verify Any protected p
248. nickel hydride or lithium batteries installed Its lens cap is actually a door that slides shut to pro tect the lens you never have to worry about losing it The flash and an indicator that lets you know when the self timer is engaged are also on the front of the camera The top panel also looks like that of a standard camera with its large round SHUTTER RELEASE button a small LCD screen that displays number of photos battery status and the like and buttons for setting the flash mode and the timer Looks can be deceiving The SHUTTER RELEASE button doubles as an ERASE OK control the SELF TIMER 1s also a SLIDE sHow button The control panel displays not the number of pictures taken but the number remaining It also uses some icons you won t find on 35mm cameras resolution setting write and erase along with the more common macro close up mode self timer and flash mode icons Two additional top panel but tons are used to select macro mode pro tect mode and to select the resolu tion display type Other differences are apparent at the back of the camera There you ll find a traditional optical viewfinder but there s also a 1 8 inch color LCD moni tor a button for turning it on and off and two buttons for viewing previous next images on the LCD On the side of the camera a covered compartment holds a jack for a DC power adapter and one for an RS232C computer interface Although the difference
249. nit but which one I d been saying that needed to explore this technology for about five years now but the prices for the development kits were always beyond my budget As thumbed through the back pages of the magazines found that things had changed There were several chips available that were erasable and re programmable and the prices for the develop ment kits now started at under one hundred dollars quickly narrowed the field down needed just a few I O ports some sort of timer capa bility and felt wanted it to be pro grammablie in a language other than BASIC I couldn t keep my guru status if admitted I d pro grammed something in BASIC Of course it needed to be affordable ADAPT 11 Microcontroller Starter Kit After much searching decided on the ADAPT 11 microcontroller modular system starter package from Technological Arts in Toronto Ontario Canada According to the ad their board plugged right into a standard prototyping board could be programmed from a PC and the starter kit came with a board a programming cable and demo software The ADAPT 11 used a Motorola MC 68HC811E2 micro computer chip which contained 2K of electrically erasable on chip memory three eight bit I O ports eight analog to digital converters and an on chip timer system It was just the ticket With much relief ordered their starter kit P N AD 11 SP at a price of 74 95 postpaid US dollars It was T
250. nload them to a computer It s easy and you can actually get better quality images than you can with consumer digital cameras The Snappy is a small simple looking device about the size of a deck of playing cards Or a Walkman Or a cellular phone It measures about 5X2 4x inches On one edge is a DB 25 connec tor that plugs into a computer s parallel port Two RCA phono jacks are on one side of the unit One accepts a video input and the other passes the video on to another device The 9 volt battery com partment is concealed by a bright blue plastic cover that sports the Snappy logo A 5 pin mystery connector is located by the video jacks We don t know what it s for and it s not mentioned in the manual Bul we re sure that Play Inc has some interesting plans for it down the road a bit The manual accompanying the Snappy is a thin 20 pages which is more than enough to explain how to get started A more detailed manual is included as a PDF portable document format file The Adobe Acrobat PDF reader is also includ ed Using the hardware could hardly be easier Once you plug the Snappy into the computer s parallel port and connect a video source to it you re done A pass through video connector is provided allowing you to watch on a video monitor the video from which you were looking to capture images The Snappy doesn offer pass through printer support however So you might have to unplu
251. nna connects to the AC line the signal is sent to its signal processing circuit It processes and separates the signal into 12 of the best possible antenna configurations These spe cially processed signals route themselves into 12 separate circuits A 12 position rotary tapping switch the Signal Switch control gathers 12 of the best antenna configurations resulting in improved picture quality For plugging in additionai Tv stereo equipment guarding against damage and surges Who can use Spectrum e Cable users You have cable but you can t get certain local stations in clearly s Non cable users You don t have cable and want the stations to come in more clearly s Satellite users You have a digital satellite system but can t get local stations clearly The Spectrum Antenna gets plugged into a three prong outlet and can accommodate two addi tional plugs in its surge Polarized three pronj plug for grounding For optimum signal ground ing to stop noise and statie The Signal Search offers varying antenna configurations for you to se lect from the best signals of all those being sent The signal then passes through the Spectrum Antenna s special Fine Tuner circuit for pro ducing more clear reception Rural areas Most TV signals in rural areas are weak making them harder to fine tune The Gain Booster is a high frequency signal booster designed to increase the output
252. ns the air fuel mixture close to the ideal or stoichiometric ratio The term stoichiometric refers to a condition in which a precise amount of air is mixed with the optimal amount of fuel so as to achieve complete and total com bustion If the mixture ratio is less than stoichiometric the mixture is deemed rich because there is more fuel than needed for com plete combustion Greater than stroichiometric means that the mix ture is lean with an excess amount of air The Neutronics system consists of a KAT 200 Micro computer a heated or unheated oxygen sensor a linear actuated induction control valve with a stepper motor wiring harness and a three way aftermarket cat alytic converter The Neutronics sys tem s oxygen sensor is mounted to or near the exhaust manifold where it can measure the oxygen content of the exhaust The oxygen content of the exhaust allows the computer to infer the air to fuel ratio of the air fuel mixture If the mixture is too rich the computer commands the con trol valve to increase the amount of air in the mixture On the other hand if the mixture is too lean the com puter commands the control valve to reduce the amount of air enter ing the intake manifold The particu lar catalytic converter used depends on engine size and vehicle weight The Neutronics system is the only retrofit emission control device that has been certified by the California Air Resources Board for use
253. ns with easy to follow video cassette guidance No special expe rience education or electronics background is necessary Just average mechanical aptitude to follow simple A B C repair procedures that are clearly outlined for you decided to get in on the action and just look at me now Now I m really in the driver s seat I m doing what want to do I m my own boss set my own hours I m making more money than my wife and I ever dreamed possible Would you believe Fm making twice what I made driving a cab and I work only half as many hours Get in the FAST LANE on the New INFORMATION SUPERHIGHWAY Everyone s Talking About t s exciting It s gigantic The technology of booming business of your own make really big ir gt pror is here today You ve been reading and money be your own boss and enjoy financial freedom Mail for FREE Information Package hearing about the amazing INFORMATION and security The fact you re reading this message FOLEY SUPERHIGHWAY It s so NEW that few tech shows you re smart enough to realize this rere Snead nicians are equipped to service this fast pe ae gore gives a Learn In Spare Time At Home i Kansas City MO 64120 1395 Since 1926 SATELLITE DISH technology including It s easy to learn in your spare time at home And Please Check Gnly ONE of the Following New MINI DISH along with the electronics when you complete the course you will receive Foley 5 C Satelite Dish Dept 31
254. ntation for claims The speed and ease of posting such business photos more than made up for the initial price of the camera and the less than ideal image quality The camera pays for itself over time when frequent camera users no longer rack up costly film purchases and developing fees In the past couple of years dropping prices and improved resolution have made digital cameras more appealing to consumers But what is really driving the market for digital cameras is the skyrock eting consumer involvement in the Internet YOU D BETTER SHOP AROUND Once you ve decided to take the digi tal camera plunge you ll soon discover that you have plenty of other decisions to make Today s crop of digital cameras includes dozens of models from a wide variety of manufacturers from tradition al camera companies like Kodak Fuji Polaroid Ricoh and Canon computer companies such as Apple and consumer electronic giants including Sony and Panasonic Many look just like pocket sized point and shoot film cameras some sport high tech futuristic packaging Some offer auto focus and others have fixed focus lenses Some have built in LCD screens for immediate viewing of photos Prices currently range from 300 up to almost 3000 resolutions from 480 X 240 up to 1600 X 1200 on Polaroid s 2995 PDC 2000 T A resolution of 640 X 480 is considered standard on entry level dig ital cameras Making matters difficult for comparison
255. ntists at tne National Institute of Standards and Technology in Gaithersburg Maryland recently unveiled a tool called the Molecular Measuring Machine that after some fine tuning is expected to be able to precisely locate and measure molecule sized features The range of the new machine the only one of its kind in the world is 250 000 times greater than that of most scanning tunneling micro scopes STM whose needle like probes can already spot individual atoms The New Equipment The new machine known as M will be used to shrink the microelec tronics world even further allowing semiconductor manufacturers to align masks during the complex process of printing ever smaller cir Government researchers have developed a ruler that will be hard to measure up to DOUGLAS PAGE cuit patterns M will also be used to calibrate various manufacturing measurement references that manufacturers can use to check the accuracy of their own mea surement equipment The instru ment is the invention of a team lead by Clayton Teague chief of the Nanoscale Metrology Group in NIST s Manufacturing Engineering Laborator He began the project in 1987 to meet the U S microelec Molecular Measuring Machine Acoustic isolation shell Vacuum system Active vibration isolation Temperature contro shell Core structure Pneumatic isolator Here are the components of the molecular measuring machine known as M designed by the
256. nto Stealth Faxes Eye popping and invaluable PBX HACKING PBXs are hacked to the tune o about 8 Billion yr PBX Hacking exposes ail issues relating to PBX hacking in cluding countermeasures This manua was featured in Forbes Magazine Shocking VOICE MAIL HACKING Exposes how Voice Mail Box systems are used and specific mes they are hacked Includes ASPEN MESSAGE CENTER BIX GENESIS RSV written Topics include electronic computer commo chemis wea t energy con ieee sea APR ID change Designs tactics amp strategies to survive an increasingly dangerous and brutal world Field expedient use of tech nology in various threat and conflict en vironments and scenarios 49 e ul i guide See our Catalog for our in amous cellphone mod guide very detailed comprehensive covers most makes 10 times more info than any competitors manual HACKER FILES p Compilation oi 100s aihe bei ge opping articles written O CENTAGRAM EZ AUDIX SYDNEY PHONE acker phreakeri ASCII text MAIL CINDY SPERRY LINK etc A must for Covers every major topic in all users hackers and security personnel hackerdom On 3 HD PC Disks 39 Finally there is a fast easy low cost way to tap an automotive fuse box Expanded fus
257. nue New York NY 10158 0012 Tel 1 800 225 5945 Web nies LWW com RCLE 95 ON FREE INEORMATION CARD 1997 Passport To Web Radio Really Cool Wired Sounds from All Over the World edited by Lawrence Magne Did you know that there s a whole world of radio waiting to be explored over the Internet As of last August there were 178 Web Radio stations broadcasting from 32 countries By the beginning of 1997 those figures had jumped to 390 stations from 50 coun ties Most are in the United States with Canada Europe and Asia strong ly represented too Others transmit from South America Australia Central America Africa and the Middle East You get to hear actual local broadcasts from cities and small towns across the country Cajun music from New Orleans country music from Paris Texas and sporting events straight from dozens of home town stadi ums and around the worid Most are live broadcasts and some are on demand allowing you to click on a pro gram whenever you want to listen to it And you can still use your computer for other applications while you re tuned into Web radio This book tells you all you need to know to get listening It offers a brief history of and introduction to Web radio and then describes all the hardware and software that s required to get started The rest of the book lets you know what s on and what s worth hearing An entire section written by ESPN s Phil Schoen is devoted to
258. o TV Microwave Maritime Radar Avionics and more even start your own business You don t need a college degree to qualify but you do need an FCC License No Need to Quit Your Job or Go To School This proven course is easy fast and low cost GUARANTEED PASS You get your FCC License or money refunded Send for FREE facts now MAIL COUPON TODAY Or Call 1 800 932 4268 Ext 240 COMMAND PRODUCTIONS 1 FCC LICENSE TRAINING Dept 240 P O Box 2824 San Francisco CA 94126 Please rush FREE details immediately PROTWMODP JO MOSUL S 12D 9U Sour sT AnMog BOOTS OD olqeng 8 NAME __ ADDRESS J L Popular Electronics July 1997 Unos puer Ao s3 oyqand mam 0 Lem ino Holo pue quod jsne quUeUTUTaAOy gf OYJ WOU OJUI 4SeIYeT ay 199 I NOL pue euljuo goreyeg uolyewUOJUT JaWNsUoD aadJ aya YAVI qt Teyord sorur OT JO m0 6 SedlAdag Tedeuey S N ZoTeqeD IIL 01 sSarppe pue weu nof Jueu Aq SOTEJED ayy J PAO IO UOyerSTUTLUp y CITY STATE _ ZIP a wo KID POWERHOUSE Check our catalog for a full line of X 10 Home Security and Home Automation products The Weller WLC100 solder station is ideal for the professional serious hob byist or kit builder who demands higher performance than usual of a standard iron but without the high cost of an industrial unit Power is adjust able from 5 to 40 watts Includes 40 watt pencil iron UL approved Net weight 1 3 4 Ib
259. o a narrower beam The electrical connections should be made permanent by soldering the wires from the balun transformer to the soluosoaj3 Jeindog 2664 Alar A Popular Electronics July 1997 j M receiver s antenna input terminal to ground when transmitting or shut down vertical members When you are test ing the antenna however use alligator clips to move the connection point up and down the vertical members The alligator clip idea cannot be used with even moderate power levels or else they may burn and cause problems use an MFJ Enterprises inc Model MFJ 259 VSWR analyzer which runs micropower to make adjustments before turning on the transmitter Besides it s rude and in some cases illegal to test antennas under power At the very least you will cause unneces sary QRM to others on the same band If you use more than one antenna or if you do a lot of antenna experimen tation then you might want to install a coaxial switch These switches are used to allow a receiver or ham radio set to use one of several antennas Up to 16 port switch models are available but the one shown in Fig 2 is a four port model This particular coaxial Switch is the MFJ 1704 made by MFJ Enterprises Inc Box 494 Mississippi State MS 39762 The common con nector is for the receiver or transmitter while each antenna is connected to one of the four switched ports Alternatively one can turn the switch around
260. o speed traps if you get a ticket while using the product the manufacturer will pay your fine by Phil Jones waveguide antenna effectively confusing the computer inside the radar gun The laser com ponent transmits an infrared beam that has the same effect on laser Lidar units If your heart doesn t skip a beat when you drive past a speed trap even if you aren t speeding don t bother read ing this I can t tell you how many times that has hap pened to me Driving down the interstate with my cruise control set at eight miles over the limit I catch a glimpse of a police car parked on the side of the road My heart skips a beat and for some rea son look at my speedometer After I have passed the trap my eyes stay glued to my rear view mirror praying the police officer will pass me up for a bigger fish It seems that as speed detec tion technology has gotten more and more advanced speeding tickets have become virtually unavoidable And although de vices exist that enable motorists to detect these speed traps they are outlawed in many States including mine t The Phazer will jam both radar and laser guns pre venting police from measuring your speed The solution Today Rocky Mountain Radar offers drivers like me a perfect solution the Phazer Combining a passive radar scrambler with an active laser scrambler the Phazer makes your automobile electr
261. ode and one of the 10 trunking banks The unit will begin searching for the system s data chan nel When it s found the scanner starts searching IDs will be displayed as they are received If the delay mode is activated when the conversation pauses the ID remains in view The scanner seeks out the rest of the con versation on another channel until the delay expires If the feature is off the scanner immediately grabs the next ID Type Il IDs are displayed as 2048 Type I as 1 5 aiden S REETA Trunk Tracker can actually follow trunked conversations as they jump from frequency to frequency There are ten scan lists for each trunking bank You enter IDs that you want to scan into those lists Each list can take ten IDs and you can select or delete any of the lists while in scan mode While in search or scan mode there are 15 repeater activity indica tors across the top of the LCD screen to show system status Each repre sents a repeater and the ones dis played represent active conversations When the scanner locks onto a con MARC SAXON versation the indicators turn off except for the control channel and the one being monitored When you find a conversation you want to monitor push hold and the BC235XLT will look for and track it until you return to scan or search mode This is 300 channel scanner that receives 12 bands plus VHF aeronauti cal and preprogrammed Service Scan for police
262. ol you This meter is a digital multimeter designed for engineers and hobbyists Equipped with 5 functions and 19ranges Each test position is quickly and easily selected with a simple turn of the FUNCTION RANGE selector rotary switch Genera Rubber Boot Included Dur Display 3 1 2 Digit LCD 21mm Figure Height Best with Automatic Polarity O ffe r Overrange Indication 3 Least Significant Erer Digits Blank Temperature for Guaranteed Accuracy 23 C 8 C RH lt 75 Temperature Ranges Operating 0 C to 40 C 32 F to 10 4 F Storage 10 C to 50 C 14 F to 122 F on a High Power 9V Alkaline or Carbon Zinc Battery NEDA1e0q Quality Low Battery indication BAT on Left of LCD Display Full Sized Dimensions 88mm tong x 87mm wide x 4 thick DMM Net Weight 400g DC Voltage DCV Range Resolution Accuracy et lay 1 rdg 2dgts j 20V OmvV Resistance Q 200V 100mV Range Resolution Accuracy 1000V 1v 20092 100mQ Maximum Allowable input 1000V DC 200092 12 of Peak AC 20KQ 1092 1 2erdg 2dqts DC Current DCA Z200K2 1009 Range Resolution Accuracy 2000KQ IKN 200uA 100nA 20M 2 10KQ 2 rdg 10dgts one an 1 Phrdg 2dgts Maximum Open Circuit Voltage 2 8V 200mMA 100LA Diode Test 10A 10OMA 1 2 rdg 2dgts Measures forward voltage drop of a Overload Protection mA Input 2A 250V fuse AC Voltage ACV Range Resolution Accuracy 200V 100mV 1 2erdg lOdgts 750V 1V Frequency Range 45Hz 45
263. olled through the program listing things slowly came into focus found what looked like the beginning of Fig 2 The ADAPT 11 plugs into any standard protyping board the actual program after all of the variables and stuff There was the following code Idx TONE_440 gener ate two 100 ms beeps 440 Hz Idab 2 Idy _100MS jsr PulsexToneB Generate two beeps eh was n t exactly sure how they did it but it looked like this loaded some stuff into some registers then jumped to subroutine sr PulsexToneB to make the beeps found the sub routine later on in the program and found that it let you load the fre quency of the tone into the X regis ter load the number of beeps into the B register load the duration of the beeps and the space between them in the Y register and make beeps eventually found that they were simply flipping an output pin high and low at an audio rate clicked my cursor on the Idab 2 line and changed the 2 to a 3 No problem Now just needed to get the new program into the chip several cups of coffee later finally got through the directions in the manual and figured everything out Most of us have compiled a program on a PC creating an EXE file but it s a little different on a microcontroller chip Still the EDIT COMPILE TEST cycle remains mostly the same In a nutshell the ASM file contains the assembly lan guage code which can be modi fied as we did in th
264. on they can mesh seamlessly into a variety of exciting and rewarding technology based careers Back in the 1930 s we specialized in teaching radio and television sciences Today it s computer technology program ming robotics broad cast engineering information systems management and the electronics behind it all traditional commuter institutes while providing an educa tion schedule to match your commit ments and lifestyle Our patented learning program is specifically tailored for independent study and backed up by a caring team of professional educa tors who are at your call whenever you need their help At CIE we ll match our training with your background and career goals and help you decide which of the many career courses that we offer suits you best We offer an Associate Degree Program and through our affiliation with World College a Bachelor Degree But some things have not changed like the desire of CIE s faculty and staff to see their graduates succeed That is why at CIE we teach not only Program the hands on practical aspects of If you have the sincerity the electronics technology but also delve smarts and the desire CIE can into the why behind today s technol make it happen CIE is already the ogy Why does it work the way it does institute of choice for many Fortune The insights to be gained from such 1000 companies Why shouldn t you
265. onically invisible to police speed detecting equipment The radar component works by mixing an X K or Ka radar signal with an FM chirp and bouncing it back at the squad car by way of a eal dae A E i L E E E N Perfectly legal Some radar devices have been outlawed because they transmit scrambling radar beams back to the waiting law enforce ment vehicle The Phazer however reflects a portion of the signal plus an added FM signal back to the police car This in effect gives the waiting radar unit an electronic lobotomy Best of all unless you are a resident of Minnesota Oklahoma or Wash ington D C using the Phazer is completely within your legal rights HOW TO MAKE YOUR CAR DISAPPEAR Radar and laser scramb ers are de vices that foil speed traps by making vehi cles electronically invisible to potice radar Radar scrambiers mix a portion of the radar signal with background clutter and reflect it back to the squad car This technique pioneered by Rocky Mauntain Radar creates an unreadable signal that confuses the computer inside the radar gun Reflected radar with en FM chirp ij Police radar ir yyy Me UUM ca lect SU The laser scrambler in the Phazet works in a similar manner it transmits a special infrared beam with information designed to scrambte the laser signal The resuit Readouts on police radar and laser guns remain blank As far as the police officer is concerne
266. or 220V 50 Hz 60 Hz Power Consumption 35 W e Operating Voltage AC 24V Warm Up Time 40 sec Ceramic Heater Element Temperature Indicator C n j r alt gt 1 g 95 e Digital LED Display Heat Sensor At Order Ne 50 850 Bi ee Element Tip Controlled range from 150 To 420 C Fused Circuit Low Power TUN O WASH 12 5 Oz aerosol ce High Effection Compare with the Fast drying electronics grade cleaner for majority it requires only 1 2 of tuners controls and PC boards CF C f vee electricity low consumption Designed for cleaning and y j Order N2 51 1000 degreasing consumer electronics __ 7 50 a Cleans in one step no rinsing required Contains no ozone J depleting compounds HCFC free Not for use on energized equipment CFC and Order N 30 0100 6 PIECES PRECISION SCREWDRIVER SET Three flat head 2 4x75mm 3x100mm 3 83150mm Three Phillips No 0x75mm No 1x100mm No 1x150mm ae A screwdriver wilh three sections precision production with tong life to be used _ I Available for fixing and combination of computer TB set communicated instrument ratio camera FLYBACK Ven TRANSFORMERS 4 14 50 g glasses clock watch and kinds of precision 55 0 e ve Order N 50 1040 m7 Replaces er geet ee ee eer 4225 N W 72nd AVE MIAMI FLORIDA 33166 TEL 305 71 6 1016 FAX 594 6588 CIRCLE 48 ON FREE INFORMATION CARD
267. orks like a dream My dad used it aboard a mer chant ship throughout WWII It has a metal case and a black crinkled finish believe the paint finish is refered to as Japaning The paint is worn to the metal in some places and l d like to refinish the case How do get to crinkle wrinkle the finish on black paint Can anyone help June Houser Chicago IL E a lultimedia Unbelievably Affordable GPS Navigation plus New Software LJ sually start off this column with an interesting piece or two of hardware and then go through all the new software This month m still start ing with hardware but it would be nothing without its marvelous com panion software I m talking about the Delorme Triomate Hyperformance GPS Navigation System It s a portable GPS receiver that s packaged with the map ping program Street Atlas USA 4 0 I ve talked about that amazing program before A single CD ROM containing maps of every street in the country When Street Atlas has a GPS receiver to work with it can show you exactly where you are and on what road And get this The receiver is bundled with Street Atlas for only 149 The only catch is that you need a notebook computer Maps can t tell you where you are but the Global Positioning System or GPS can This constellation of satel lites lets a GPS receiver lock onto a position fix The general public can t use the GPS system to the same degree of accuracy tha
268. orms such as Fast Fourier Transformation FFT integration dif ferentiation and histogram The built in digital signal processor can run two mathematical operations at any one time on any waveform Other Math features include automatic pass fail testing and amplitude qualified cursors and a program for customer specified test setups The CombiScope B Series is priced at 2995 for the PM 3370B 3575 for the PM 3380B 5850 for the PM 3384B 4790 for the PM 3390B and 6925 for the PM 3394B For more information contact Fluke Corporation P O Box 9090 Everett WA 98206 Tel 1 800 44 FLUKE Fax 1 800 FLUKE FAX e mail fluke info tc fluke com Web http www filuke com CIRCLE 80 ON FREE INFORMATION CARD Camera Digital Video Modulator According to NetMedia its CAM odulator is the world s first and only black and white camera combined with a digital video channel modulator The modulator allows you to view the cam era signal on any TV and combine that Signal with existing cable service or other video in the home or business The combination of small size easy use discrete installation and coax power makes the CAModulator ideal for security surveillance and monitoring applications indoors or out Travelers can take advantage of the 12 volt oper ation to use the device for a back up camera in their RVs A homeowner can watch the front door on channel 60 and the back door on channel 62 while monitoring th
269. ou have it Robert Wait no longer for a new Nordmende radio lf you ve set your heart on a German made SW portable receiver you might want to consider one of the new Grundig Yacht Boy models Down The Dial Looking for something interesting in SW signals to tune Try these You no doubt are hear ing other stations so why not drop me a note telling about your ltoggings Please list reception times in Coordinated Universal Time UTC which ts equivalent to EDT 4 hours amp Abbreviations w AM ampitude modulation CDT Central Daylight Time gt gt yr ok s t Ea DxX distance long distance reception EDT Eastem Daylight Time FM frequency modulation ID station identification kKHz kilohertz MDT Mountain Daylight TH ime PDT Pacific Daylight Time R Radio SWW shortwave UTC Coordinated Universal Te Dial a ra Bea F CDT 5 hours MDT 6 hours or PDT 7 hours Your DX receptions could be listed here next month lf you have any shortwave related questions and or topics we should cover send them along too Address your letters in care of DX Listening Popular Electronics 500 Bi County Blivd Farmingdale NY T1735 Antigua 6 160 kHz Germany s Deutsche Welle has been heard via this West Indian island relay transmit ter Look for it in English at around 0930 until it leaves this frequency at 0950 Armenia 9 9
270. per side of the board and adhesive should be placed underneath The photocell should be set so that its light sensi tive surface is about 3 inch above the copper side of the board Do not get any of the adhesive on the surface of the photocell or on the top part of the LED Set the assem bly aside until the adhesive has fully cured That can take a day Identify the cathode lead of the LED Then using a small drill bit uch as 57 drill a hole at a location away from the fingerrest area for the cathode lead of the LED Solder the cathode lead to the copper surface of the board Finally drill one more small hole in the board for the common lead connection as indi cated in Fig 3 That completes the transducer assembly The remaining three component wires and the common lead will be connected to the main circuit board later Circuit Board Construction Figure 4 shows a full size template of the author s printed circuit layout for the main board An etched and drilled board is available from the source given in the parts list Hardwiring the circuit on a perf board is not recommended due to the high gain of the amplifier A parts placement diagram for the author s circuit board is shown in Fig 5 When installing the compo nents pay close attention to the orientation of the polarized parts Just one part placed in the circuit backwards will render the circuit inoperative and may cause dam age to one or more components
271. place ment diagram shown in Fig 6 Just as with the tone gen erator be sure to install the low profile components first followed by the taller components Again sock all ICs except the regulator IC3 a socket is absolutely necessary for the display the reason for this will become apparent later Several of the pins on the display socket must be clipped off or removed before it can be installed on the printed circuit board Note that diode D1 resistors RO and R10 and LED are not installed onto the printed cir SEE TEXT ets are recommended for cuit board but are instead mount ed to the leads of jack J1 Be sure to locate resistor R away from the other components as it does dissi pate heat while the batteries are charging After installing all of the board mounted components but before inserting IC1 IC2 and the display into their respective sockets tem porarily apply power to the board and confirm that 5 volts appears at the output of IC3 Once verified remove power and insert IC1 IC2 and DISP1 into their respective sock ets With power applied once more connect the unit to any one of the 16 available outputs from the tone generator The hexadecimal character representing the con nected generator output should appear in DISP1 for half a second before the display goes blank If leff connected the same character will reappear about one second later That sequence of events will occur for
272. prices shown If you select a book that counts as 2 choices write the book number in one box and XX in the next A shipping handling charge amp sales tax will be added to all orders 1997 EBC Cad Popular Electronics July 1997 w gt 2 AUDIO R1 T 10K INPUT R2 XTAL1 amp 1 MEG 3 58 MHz R7 1K Jt D1 1N4001 LEDI R10 1K SEE TEXT FF Si v RQ 2N3904 5V aj P ON C a 10 p a a NN O U E Fig 2 The second half of the DTMF Wire Tracer the tone decoder which is designed to detect and identify signals produced by the tone generator is composed of three ICs an SSI 204 DTMF decoder IC1 a 4538 dual monostable multivibrator 1C2 and an LM7805 5 volt l amp voltage regulator 1C3 three transistors O1 O3 and a display module DISP 1 a TIL311 Hybrid dot matrix LED display with built in hex decoder driver pled with a crystal reference XTAL1 generates a DTMF tone in accordance with binary data applied to its inputs at pins 9 to 12 The binary data represents the DIMF digit to be generated While the binary data is being applied to the inputs of IC3 a tone enable sig nal is applied to pin 2 by coupling the clock signal through an inverter comprised of IC 1 d The DTMF tones generated by IC3 are output at pin 14 Resistor R3 provides a reason able load impedance for the audio output stages of IC3 Capacitor C
273. ps you get your photos Internet ready Select Web Page to prepare your photo for use on a Web page including converting tt to a GIF format or e mail JPEG format Or you can select Photo to PageMill if you want to use Adobe s PageMill software for creating Web pages This option allows you to drag and drop a photo directly to a Web page of your Own creation PhotoDeluxe s Cards and More catego ry allows you to create monthly or annu al calendars and all sorts of greeting cards In addition you can create maga zine covers album covers report covers flyers signs labels and gift tags that incorporate your digital photos Novice image processors will find enough variety in the Guided Activities area to keep them happily creative for a long time Those who are looking for more artistic freedom can find it in the On Your Own mode There you ll find the same basic interface although you no longer have to proceed through numbered steps to accomplish various tasks On Your Own offers three main cate gories from which to select Get Photo Modify Photo and Save Print Get Photo offers the same options as in the Guided Activities mode plus one You can open an existing file or one of Adobe s sample photos use a scanned image or download a photo from a digital camera a Photo CD Snappy Fuji Film Kodak Photo Disk Konica Picture Show or Floppy Shots In addition you can use Adobe s decorations which aren t avai
274. r SG 4160B 124 95 100 kHz 150MHz sinewave in 6 ranges RF Output 100mVrms to 35 MHz Intemal 1kHz Extemal 50Hz 20kHz AM modulation Audio output 1 khz 1 Vrms Output Impedance 50 Ohm Size 5 9 Hx 9 8 W x 8 1 D RF Signal Generator Counter SG 4162AD 229 95 Generates RF signal same as SG 4160B 6 digit frequency counter 1Hz 150 MHz for intemal and extemal source Sensitivity lt 5OmV Audio Generator AG 2601A 124 95 10Hz 1MHz in ranges Output 0 8Vrms_ sinewave 0 10Vp p squarewave Synchronization 3 of oscillation frequency per Vrms Output distortion 0 05 500Hz SOKHz 0 5 50Hz 500kHz Output impedance 600 ohm Audio Generator Counter AG 2603AD 229 95 Generates audio signa same as AG 2601A 6 digit frequency counter 10Hz 150MHz for intemal and external sources Sensitivity lt SOmV Function Generator FG 2100A 169 95 0 2 Hz 2 MHz in 7 ranges Sine squareAnangle pulse ramp Output SmV 20Vp p 1 distortion DC offset 10V VCF 0 10V control freq to 1000 1 Function Gen Counter FG 2102AD 229 95 Generates signal same as FG 2100A Frequency counter 4 digits Feature TTL and CMOS output Sweep Function Gen Counter 329 95 0 5Hz to 5 MHz in 7 ranges Sweep Linear10 1 Log 10 1 20ms 2s AM Modulation Gated Burst Voltage Control Gener Generator Control Voltage amp 6 digit counter 1Hz 10MHz for intemal amp extemal sources 800 526 2532 609 897 1135 1 YEAR PARTS AND
275. r logic O output Hysteresis is pro vided by the positive feedback through R13 In the second path the output of IC2 b is applied to RII a l megohm potentiometer which is used to set the circuit s sensitivity level The output of U2 b is fed through the wiper of R11 to the non inverting input of IC2 c to set the biased voltage at pin 9 at somewhat less than 2 volts Because of that the output of IC2 c at pin 8 will always be near 5 volts when the circuit is at rest no light excitation on R17 When a finger is placed in position the amplifier produces the heartbeat waveform at IC2 d pin 7 That signal is fed to the voltage comparator through R12 producing a negative going pulse train at pin 8 of IC2 c that s synchronized with the heart rate That pulse train is used to trigger IC3 an LMC555 CMOS oscillator timer that s connected as a monostable or one shot multivibrator The monostable produces a positive going pulse at its pin 3 output each time it s triggered The pulse duration about t o second is determined by R15 and C10 Transistor QI and LED2 are PARTS LIST FOR THE HEARTBEAT MACHINE SEMICONDUCTORS IC 78L05 5 volt 100 mA voltage regulator integrated circuit C2 1_M324N quad op amp ape circuit C3 LMCSS3ChK C MOS scillatoritimen integrated circuit QI B5170 N channel enhancement TMOS FET DI 14148 or similar silicon awitching diode LEDI Light emtting diode
276. r that has EGA or better raphics capability and an RS232 serial port The Woofer Taster will generate the ollowing parameters Raw driver data Fs Qms Qes Qrs Vas BL SPL 1W 1m Mmd Gm and Rm Sealed box data Fsb and system Q Vented box data Fsb ha alpha and Q loss The Woofer Tester system includes hardware test leads serial cable AC wall adaptor detailed instructions and software PO 390 800 cccsececccesseesssssseeeen ele Ratt eT ee l a YEAR WaRRANTY SAME DAY SHIPPING High quality Japanese s made patch cord fea tures color coded RCA gt plugs on each end for NA m easy polarity Identification Molded i strain reliefs for extra long life and dura bility Limited availability Price Price Part Description 1 9 10 UP PO 189 070 Red white plugs 1 20 95 PO 189 072 Yellow black piugs 4 20 95 Now s the perfect time to start building your own PC boards A factory buyout enabies us to ee you this premium quality copper clad PC boards at unheard of low prices Each board is coated with 0014 copper and is at least 060 thick Limited availability Price Price Part Description 1 9 10 UP PO 055 204 6 x 18 single sided 1 50 1 35 PO 055 206 6 x 21 single sided 1 75 1 55 PO 055 222 8 x 24 single sided 2 65 2 40 PO 055 252 6 x 18 double sided 2 25 2 00 a weg i 900 MHz technology sends signal up to 180 ft through walls floors and callings Ide
277. rating alarms and changing desktop wallpaper and sound themes lf you like to have a fine degree of control over how you launch programs you will love Stiletto You will also love its 22 price and you can download an evaluation copy from CompuServe or the author s home page Partition Magic In case you have not run across the concept yet the FAT file system which has been in use since DOS 2 0 becomes less and less efficient as hard disk size increases You can eas ily end up wasting virtually hundreds of megabytes on a 1 GB or larger drive One way around the problem is to break the drive down into two or more partitions The key is to reduce the value of the cluster size where a clus ter is a group of sectors Until Partition Magic came along the problem was that there was no way to change partition size hence cluster size without reformatting a drive from scratch This would involve backing up everything partitioning formatting and Continued on page 83 Combiscope Oscilloscopes The five new models of Fluke s CombiScope Oscilloscope offer a com bination of an analog oscilloscope and a digital storage scope DSO All of them add functionality and improved performance with a number of features that were previously available only as options The CombiScope B Series have higher sampling rates on some models and deeper memory per channel along with built in software for mathe matical processing o
278. ring ing upon the closely held Armstrong regenerative patents Freed Eisemann geared up its manufacturing operation to switch from simple crystal sets to five tube Neutrodynes and in 1923 began selling NR 5s hand over fist Advertising copy for the NR 5 which sold for the hefty sum of one hundred and fifty 1923 dollars without tubes or batteries promised A startling ad vance in radio progress Non regenera tive Non oscillating No howling or hissing Remarkable clarity and power and tremendous distance Simple in operation Built by the Freed Eisemann engineering organization of master craftsman Sales in 1923 and 1924 were excel lent and some model variations were introduced But the numbers began to slump the following year due to compe tition from manufacturers turning out lower priced three dialers using loss er circuitry to circumvent the Hazeltine patents The firm introduced a non Neutrodyne model the 10 to compete but it didn t work well Despite other innovations including a pioneering but premature AC model introduced in 1927 Freed Eisemann never regained its leadership position In 1928 the company was sold to the Charles Freshman Company soon to be renamed Earl Radio Corporation Basic NR 5 Circuitry The NR 5 schematic diagram that accompanies this column taken from Rider s Volume 1 is regretfully not the best quality But it s the best one I ve been able to get my hands on an
279. rn for the grid bias C voltage Finally the bottom post labeled C supplies grid bias voltage to the audio amplifier tubes the final two tubes Notice the two filament control rheostats located toward the bottom of the schematic one under the third tuned circuit the other roughly under the second audio phone jack Although you might not be able to make it out the former is labeled as an amplifier control and the latter as a detector control It would make sense to have the detector filament controlled separately because detector adjust ments are more critical than amplifier adjustments However tracing the wiring it looks as if the amplifier rheostat controls only the filaments of the two RF ampli fiers while the detector rheostat con trols everything else it will be interesting later to compare the wiring of an actual NR 5 with this schematic to see if it is hooked up the same way The Knock Down Neutrodyne do happen te have in my collection a five tube Neutrodyne that although not specifically identified as such has to be the KD 50 Neutrodyne kit put on the market by Freed Eisemann about 1924 Now that I ve had a chance to compare it with the NR 5 I m more convinced of that than ever The set sold for 80 which was quite a sav ings over the 150 cost of a factory assembled NR 5 The set did not come with a cabinet or tubes although it did have a pre drilled and labele
280. rollable Devices B slay Driver includes 8 LED Status Lights 12V Qperation includes Infrared Receiver for Remote Operation Attach 16 per serial port With Omron Mechani Cal Relays 4 Relay Mode available R85 SA Kit 89 Asm 139 R810 10A Kit 109 Asm 159 IN _ ANY Cor bination to Your RS 232 Port i Fe eS Wi ht pie So Yass os AATKARS SA nan armen aed Multi Power 8 16 Hobby Servo Controller Futaba J Compatible infrared Receiver Included with SV16 upgrade Designed for all animatronic applications SV8 Kit 39 Asm 54 SV16 Upgd Kit 19 Asm 29 IRTR Kit 24 Asm 39 Needs to Drive 16 NCD Devices RSB Kit RSB Serial Booster Gives your RS 232 Port the Power It http memabers aol com ncdcat index htmi _ E mail ncdryan acl com C O R Low Low Price 25 BNC BNC CABLE N 25 foot RG58 A U 50 ohm co ax cable with male BNC connectors molded with strain reliefs on both ends ideal for studio lab or communi cations use Inquire for quantity pricing 75 CAT CBL 25 10 for 45 00 6KV TRANSFORMER Primary 110 220 Vac 18 6 Ohms DC resistance Secondary 6 000 Vac 0 01 Amps 17 89K Ohms DC resistance Ideal for ozone generators bug Zappers and other high voltage applications 4 7 X 2 6 X 3 43 high CAT HVTX 4 Plastic mounting feet 2 00 each with holes on 4 5 X 2 25 centers 9 long leads NOTEBOOK COMPUT
281. rs Guarantee to pass or money back l Send for FREE DETAILS or call 1 800 300 7588 aA WPT Publications l 4701 N E 47th Street Vancouver WA 9866 1 Name l l city St Zip E 1800 8007588 a Address soiu0sjoe 3 seindog Z664 ANF Popular Electronics July 1997 118 SS ADVERTISING INDEX Popular Electronics does not assume any responsibility for errors that may appear in the index below u e M a Free Information Number Free Information Number Page Page 25 Ace Communications 92 150 Jensen Tools 114 Aegis Research Canada 92 Kableworks 22000000 96 POTD seem i eniinn 100 KDE Electronics 111 26 Alfa Electronics 99 Learn Ime amai 3 28 All Electronics 105 144 MCM Electronics 87 137 Allison Technology 113 Mega Electronics 0000 116 Allstar Electronics 1t2 147 Mendelsons 88 Amaze Electronics wl 13 Mental Automation 110 AMC O lt n 116 171 MicroCode Engineering CV4 American Innovations 115 Millennium Enterprises 117 a Andromeda Research 111 Modern Electronics 96 Basic Electrical Supply 106 National Control Devices 104 Bel Merit sasihikistanan iin m2 Nevada Systems
282. rvival Offers Includes Computers Phones Crime Security Survival Vehicles Energy Mind Control Strange Phenomena Medical Financial much more Discover how people are making hacking just about everything How to protect yourseif from hi tech crimes Since 1971 Order today 3 00 number 504 in coupon California Digitat T Sete Geet Cet CMe D Professiona Sign Making S 3 Dimellijanyl Computarized Milling Maching Crgavers Tool Professional Sign Making Machines Production machines for professional sign makers The Roland Corporation produces the CAMM 1 series of roll feed sign making machines Catalog 963 features a sampling of the 10 000 computer items that California Digital offers Please contact our technical ser vice representatives to assist you with items not featured in this publication 2 00 number 508 in coupon Elogironio a Symponre Supri v Alltronies Distributor of electronic components from fran chised manufacturers and overstocked sources operating over the counter service Distributors for American Antenna antennas American Hakko soldering irons desoldering systems Amidon toroids baluns Centurion two way antennas batteries Circuit Works conductive IC pens for PC board repair ICO Rally tubing sleeving insulation terminals cable ties KLM antennas Larsen antennas LMB Heeger metal cabinets chassis boxes 2 00 number 512 in coupon
283. s PO 372 120 ceceesseesecceesesees LE LA 2 ie i The Sound Bridge is a mini FM wireless transmitter that can be used to broadcast stereo Sound from any au dio source like portable CD players TVs electronic games CD ROM even computer soundcards to your home stereo receiver Adjustable from 89 to 95 5 MHz LO eT as 3 oan These are the best sounding little speakers you can find at anywhere near this price Perfect for rear channel use ina home theatre system or for outdoor use Features 4 polypropylene woofer 2 polycone midrange 3 4 dome tweeter housed in a weatherlzed powsinpee n closure Frequency response 90 20 000 Hz Imped ance 4 ohms Power handling 30 watts RMS 60 watts max Mounting brackets included 7 1 4 H x 4 5 8 W x 4 3 8 D Net weight 6 Ibs Compare To Speciaj PO 319 020 Black PO 319 025 White eneereeeneers A DAE aa ae To fully appreciate the potential of movie soundtracks a dual voice Coil subwoofer is a must Many fitm spe cial effects are extremely demanding in the low frequency range and re quire a subwoofer that can duplicate explosions earthquakes even the footsteps of Tyrannosaurus Rex This subwoofer fits the bill by featuring a 10 dual voice coil woofer for true Stereo op eration and high pass filters for your main speakers The most unique feature of this subwoofer is the fact that it is designed to be mounted in between the floor joist
284. s Using the TX_ON and TX_OFF functions with the WaitX function soiuosjoay seindog Z664 ANF is Popular Electronics July 1997 oo N was able to turn the transmitter PTT line on and off at will for any dura tion of time had completed all the basic functions necessary for a foxhunt transmitter controller and still had two nights left As luck would have it heard Jim talking on the local ham repeater on the way home the next night broke in just to say hello Glad to hear from you he said How s that controller coming along I ve got my yagi and attenuator all tuned up for Saturday morning Well I ve given it some thought said Should be able to whip something up the next night or two Been pretty busy Sure hope you whip something up There s gonna be about thirty guys there looking for something to hunt l hope it won t be you they ll be looking for By the way got to thinking about the time interval on __ Technological Arts Suite 1704 eat Boren eae Ontario piaz Woice Pde ia 963 8996 Pater epic none aha Neen i T et r KF EJ that thing hope you make it adjustable Not really sure how much on time and off time we re supposed to get Wouldn t want it to be too discouraging to the guys Not really sure if we need that SK business either Oh well whatever you think signed off with Jim and headed home Great Now nee
285. s Long Access Time Track 1 to 21 4 1 Seconds Disc Access Time Disc 1 to Disc 15 6 1 seconds Disc 1 to Disc 30 7 0 seconds Disc 1 to Disc 45 7 7 seconds Disc 1 to Disc 60 9 0 seconds Power Requirements 8 5 S Dimensions HxWxD inches 6 1146 X 16 15 46 15 g Weight 14 5 pounds TECHNICS TEST REPORT Continued from page 50 seconds to get from Disc 1 to Disc 15 just 7 seconds to get from home plate to second base Disc 30 and does 0 to 60 in 9 seconds These are impres sive times Compared to a high perfor mance five disc carousel tested here in the past Popular Electronics January 1996 That changer the Marantz CC45U took 6 9 seconds to get from Disc 1 to Disc 5 having only to reverse one position and not spin past Discs 2 3 and 4 Despite all its programmability options the SL MC60 works just fine in the lazy man mode also known as Automatic Random Play where the machine s brain just picks and choose among discs and tracks at random In this case though with 60 CDs to choose from it can sustain this solo game for 250 selections Is there anything to regret about the SL MC60 Perhaps only the lack of a headphone jack so for private listen ing you will have to patch into your pre amplifier or receiver FOR MORE INFORMATION TECHNICS One Panasonic Way Secaucus NJ 07094 Tel 201 348 7000 Performance As the APEL measurements show the changer s electrical performance i
286. s good in every area though not the best ever measured At some points where the SL MC60 falls short of perfection it doesn t really matter These shortcom ings can be measured by lab equip ment but can t be heard by human ears The frequency response Fig 1 is virtually ruler flat as you should expect in the CD format Likewise wow and flutter are nonexistent Both signal to noise ratio and left right channel sepa ration are good but no record breaking marks Dynamic range which mea sures the spread between the softest and loudest sound the player will resolve is adequate The changer s 90 dB decibels reach will cover the range recorded on most CDs As for total har monic distortion THD APEL s read ings for the SL MC60 are par for the Continued on next page so1udjjoa g Jeindog 7661 ANF J S Popular Electronics July 1997 J THINK TANK Continued from page 67 the 1 volt program lines Measured fre quency response of the circuit was found to be within 3 dB from 5 Hz to 250 kHz Noise generated in this circuit is almost entirely dependent upon the power supply used When used with battery operation for all practical pur poses this circuit would be totally noiseless Craig Kendrick Sellen Waymart PA Wow for budding musicians this is a nice companion to the guitar practice amplifier mentioned earlier It s simple and very inexpensive A bunch of these connected to a home brew m
287. s Capacitors EEE A STR 30130 SANKEN 1 2 66 Car Audio Accessories Tools And many 4 yi Microwave Accessories idlers many more f TA 7777N TOSHIBA 1 5 25 S 5 149 UNIQUE REALTIME OSCILLOSCOPE BUILT IN PN FUNCTION GENERATOR 2 CH DUAL TRACE AGS 1 MHZ FUNCTION GENERATOR iha 5 Features Wider than specified frequency response High deflection factor of 1mV div e Wide dynamic range up to 30MHz without waveform distortion Algebraic sum of CH1 and CH2 Low drift with compensation circuit e Superb trigger sensitivity Maximum sweep rate of video signals with internal TV sync Separator Jittless trigger circuitry CH1 signal Output terminal available Variable trigger hold off High precision X Y phase difference measurement up to SOkHz e Built in function generator with BNC output of 502 and TTL Three kinds of waveform are available with 509 output Flat output waveform frequency up to 1MHz Specifications Vertical deflection Bandwidth OC coupled DC to 20MHz normal AC coupled 10Hz to 20MHz normal Deflection factor SmV div to 5V div in 10 calibrated steps of 1 2 5 sequence Rise time 17 5ns or less Horizontal deflection Time Base A 0 2us to 0 2S div in 19 calibrated steps 1 2 5 sequence Uncalibrated continuous Control between steps ofat least 1 2 5 sequence Uncalibrated continuous contro between steps a TTS Order N 50 820 Telephone Accessories Belts i es gt da r m E
288. s are not readi ly apparent to the eye they are sufficient to cast a technophobe into a state of con fusion We loaned the D 200L to a friend who was on the way to watch her son march in his first parade she had forgot ten her pocket camera and didn t have time to go home for it Nor was there time to explain the workings of the D 200L we didn t really think it was necessary anyway But when she returned the cam era she reported that she didn t get a sin gle picture she couldn t figure out how to turn it on She thought her problem was solved when she noticed a computer savvy neighbor accompanying his son s scout troop in the parade he couldn t get it going either In reality all you do is slide open the lens cover and the D 200L is ready to go You can tell it s on when indicators appear on the control panel Our friend s problem arose when she opened the lens cover several minutes before she was ready to shoot the D 200L automatically turns itself off after three minutes of inac tivity to conserve battery life Our friend and her neighbor didn t realize that she had to close and reopen the cover or press the SHUTTER RELEASE button halfway to turn it on again Another potential source of confusion is that when 01 appears in the control panel you re not about to take your first photo you re on your last one The D 200L stores 20 high resolution or 80 standard pictures in its 6MB o
289. s in new and 8X isting home constructions Simply mount the in f oor sub to the Joists and mount a heat register grill above opening in subwoofer front enclosure The subwoofer is now totally out of view and ready to rumble Includes detailed installaticn manual Specitications 10 dual voice coil treated paper Cone woofer with poly foam surround Frequency response 30 100 Hz Naminal impedance 8 ohms per coll Power handling 100 watts RMS channel 140 waits max SPL 89 dB 1W 1m Dimensions 27 D x 14 5 8 W x 9 H Ne weight 29 Ibs PO 300 445 o oo eee ceecesceeeeenneeenenters epnd ioseph e EACH Za UNBELIEVABLE VALUE hue ron spr a E Peak Instrument Co proudly introduces The Woofer Tester Just ask any loudspeaker engineer and they will tell that the only way to design enclosures of the correct size and tuning is to measure the Thiele Small parameters for the actual drivers to be used The reason Manufacturers published specs can be otf by as much as 50 But until now measuring the parameters yourself required expensive test equipment and tedious calculations or super expensive measurement systems 1 200 to 20 000 The Woofer Tester change all that Finally a cost effective yet extremely accurate way to deriva Thiele Small parameters In only minutes The Woofer Tester is a combination hardware and software system that will run on any IBM compatible compute
290. s not provide the full functionality of Photo shop nor does it plague users with Photoshop s complexities What it does and does quite welk is allow anyone with basic computer skills to take a so so digital image and convert it into a work of art So what if the color isn t quite right you can adjust it Red eye making your little darlings look like little devils Paint away the red and turn the pupil black again Is your subject a mere speck in the corner of a photo Crop the shot and enlarge the subject Don t stop there Adobe PhotoDeluxe lets you change all the colors in your photos create poster ized or Impressionist versions of your pictures frame them turn them into screen savers and post the finished prod uct on the Internet The program is exceptionally easy to use It offers two modes Guided Acti vities and On Your Own As its name implies Guided Activities walks begin ners step by step through each specific task required to complete a goal On Your Own provides users with more freedom but stil retains the simple interface Three general categories are presented in Guided Activities mode Touch Up arete thet coal kat T Oo ae 4 2 i Photo Transform Photo and Cards and More Within each numbered folders are used to represent every step required to complete the activity You simply click on each number in order to open the fold er follow
291. s to breadboard it exactly as shown see how it works and then experiment with component values if desired Don t for get to heatsink the LM383 A particular ly interesting area for experimentation with this circuit is to utilize the other half of the LM382 dual preamplifier for a second guitar or an effect feedback like reverberation Naturally the two pream plifiers would need to be mixed before being applied to the LM 383 power amplifier Nick Cinquino Schaumburg IL The bargraph is a good finishing touch By changing the resistor values the 382 portion of the circuit might make a nice preamplifier stage for the circuit in the previous letter R1 LED DISPLAY R5 4 7K D1 C9 2 2 SEE TEXT Microphone Transformeriess Transformer One of the advantages enjoyed by circuits employing solid state devices over their vacuum tube counterparts is their ability to provide impedance matching in varied circuit configura tions That ability has been successful ly exploited in transformerless amplifier drivers resulting in almost unlimited fre 20 TO 25VDC FROM AMPLIFIER IF POSSIBLE quency response and nearly perfect damping The transformerless circuit shown in Fig 5 may prove valuable to the audio phile who wishes to eliminate all trans formers from the sound system Not only does that device surpass the spec ifications of typical impedance matching microphone transformers but i
292. s up counter IC2 a National Semi 5V i TO S01 TF SEE TEXT q GND mprised of five integrated circuits a 4011 quad 2 input NAND gate conductor TP5088 DTMF generator IC3 a CD4067BE 16 channel analog multiplexer demultiplexer IC4 and a 78L05 100 mA 5 volt regulator IC5 along with a handful of support components adding a commercial wire tracer to your tool box Fortunately there is an alternative the DIMF Wire Tracer The DTMF Wire Tracer is somewhat similar to commercial units in that both a transmitter tone generator and a receiver tone decoder are required But unlike commercial units the project described here allows up to 16 conductors to be easily identified in only a matter of seconds That feat is accomplished with the aid of a tone generator The tone generator produces 16 dis tinctly different tone combinations DIMF signals by way of 16 sepa rate outputs The tone generator is paired up with a tone decoder that is capable of identifying all 16 DTMF tone combinations and displaying the appropriate character on a dot matrix alphanumeric LED dis play For example if the tone decoder is connected to output 1 of the tone generator the number 1 will appear in the decoder s dis play If on the other hand the decoder is connected to output 2 then the number 2 will be dis played Both units are battery oper ated for maximum portability The The tone g
293. s will find the UCANDO videos to be a valuable source of reference material If me these videos aren t the best learning tools you ve ever seen retum them within 30 days for a complete refund These videos are being used by Tech Schools CET s Military Branches Ham Operators Industries and more across the United States and around the world Order today and see how UCANDO is Changing Th The ape World Learns Electronics 1 1 800 678 61 13 os or mail check or money order to UCANDO Videos P O Box 928 Greenville OH 45331 FREE Shipping FREE Catalog CIRCLE 136 ON FREE INFORMATION CARD eS p is unbelievably widespread hevices with amazing capabilities can be monitoring your telephone and room conversations RIGHT NOW sure you re safe FREE CATALOG telis you fast Includas Free Bonus details on fantastic opportunities now open in Exciting immensely interesting and EXTREMELY profiteble up to 250 hr full part tima 1 800 732 5000 HOME AUTOMATION World s Largest Selection Widest Selection of REU Aiinesnrine y Te X 10 Devices Available s iosia m pea Hundreds of hard to find automation X 10 and wireless control Guy ential gt products Computer interfaces software development tools light a ing control telephone systems security systems surveillance g ey cameras infra red audio video control HVAC pet care automa
294. se dual preamplifier for my guitar preamplifier The trick is likely that the preamplifier circuitry is run off a regu lated supply with the regulator being included inside the IC My resulting circuit Fig 4 has good volume and power levels very low 60 Hz noise and an output level or distortion meter all with a minimum of parts and fuss In the schematic IC1 is the LM382 dual preamplifier only one preamp is used IC2 is an LM383 audio power amplifier and IC3 is an LM3915 LED dot bargraph display dri ver with an external LED bargraph dis play unit A curious feature of this circuit is the input at the preamplifier Note that the inverting input pin 2 is uncon nected This is not a schematic error My IC Databook didn t give much guid ance happened to try it as shown 15VDC woe GUITAR INPUT VIA SHIELDED CABLE z 15VDC n C5 100 c8 1 SPEAKER C6 BQ 250 10 WATTS 1N914 E RG and it works well Maybe it s internally ground referenced don t know for sure If you use component and power values exactly as shown when the bar graph gets up to the 9th or 10th seg ment you will start to get a clipped distorted output particularly notable at low audio frequencies This is a very handy feature for bad tone deaf musi cians like me Besides it s just plain fun to watch the bargraph jump around in response to clumsy pickin Anyway the best suggestion i
295. serviced is there a charge for service what do you have to do to obtain service and wil the product be repaired or replaced You may want to receive a copy of the written warranty before placing your order 4 Keep a copy of all transactions inciuding but not limited to cancelled check receipt and correspondence For phone orders make a note of the order including merchandise ordered price order date expected delivery date and salesper son s name 5 lf the merchandise is not shipped within the promised time or if no time was promised with in 30 days of receipt of the order you generally have the right to cancel the order and get a re fund 6 Merchandise substitution without your ex press prior consent is generally not allowed 7 Ifyou have a problem with your order or the merchandise write a letter to the selier with alt the pertinent information and keep a copy 8 If you are unable to obtain satisfaction from the seller contact the consumer protection agency in the seller s state and your loca Post Office if after following the guidelines you experi ence a problem with a mail order advertiser that you are unabie to resolve please jet us know Write to Advertising Department Gernsback Publications inc 500B Bi County Bivd Farmingdale NY 11735 Be sure to Include copies of all correspondence ANTIQUE RADIO Continued from page 64 three audio jacks For example no power reaches the filam
296. size or a 9 6 volt battery pack of the type commonly used in radio controlled toys can also be used Use Suppose that you needed to identify 16 individual conductors in a computer cable First connect the tone generator s ground lead to the shield wire on the cable Then simply connect one output from the tone generator fo each conductor that s to be identified and apply power to the generator Now go to the opposite end of the cable and connect the tone decoder s ground wire to the shield wire on the cable By simply probing each of the 16 wires one at a time their identity will be clearly displayed by the Tone Decoder Unit Now all that needs to be done is to apply the proper labels fo each of the wires at both ends of the cable Note that it is per fectly normal for a second or so to pass before a character is displayed on the tone decoder That s because the tone generator takes approximately 1 25 seconds to completely cycle through all 16 possible DTMF tone pairs If the probe on the tone decoder is left connected to a conductor being tested for several seconds or more the displayed character will appear blinking in the display If you suspect some wires are crossed check all of them for more than one responce The companies cited in the side bar are valid parts sources for items listed in this feature To the best of my knowledge these suppliers are willing to sell parts and materials in small qu
297. sociation amp p EXERCISE py r y ee x oog 6 s ki s Optima 6s ape Order N 46 2705 ALG Sa a ce p Ji amn m e RE oh pi B nae ic iL Eao J n A availabilty Prices ale bjeg to chasnge w y ra i CALL NOW FOR YOUR FREE CATALOG sont Svan 1 800 325 2264 may pit items o choose trom Semiconductors Headphones Tuners ORIGINAL JVC OPTICAL PICK UP ASSEMBLY s 53 20 30 Watts Power e Bakelite Construction 1 8 Tip a ee Order N 2 51 1055 pis Security Product Cleaning kits Tripters cmensow maasian SMU Wy Lop a 5 lt Cellular Accessories Telephones ieee Tires erem ogy Educational Video Connectors Flybacks Power Products CATV MATV Lanterns Remote Controls Terminal Pinch Rollers Cable assembly Switches Clips amp Ties VCR Heads Speakers Multimeters Power Supplies Boombox Chemicals Pee se Soldering tools Resistors Antennas Xoie Wallet Sy Educational kits Batteries Microphones CEQ QE a ti com HOT PRICES ON POPULAR SEMI S Order Brand Min Price BU 208 TESLA 10 1 49 SS BU 208 0 TOSHIBA 1 3 49 D 2N 3055 TESLA 10 0 29 2N 3773 TESLA 5 1 20 25D 1398 SANYO 10 2 V For soldering and tinning net content 50g Order N2 51 1920 280 1650 SANYO 5 0 99 Frequency Counters Fuse
298. sor OWI 989K Solar Sensor Fax v Tool Kits for Installing Maintaining Trouble Shooting amp v Electronics Testing amp v Networking Accessories and much more v Prompt Delivery of Your Order v Courteous Customer Service at All Times v Free Technical Support Including FaxBack v Lifetime Guarantee on Jensen Brand Hand Tools JENSEN TOOLS 7815 S 46th St Phoenix AZ 85044 Tel 800 426 1194 or 602 968 6231 800 366 9662 or 602 438 1690 http Awww jensentools com Repairing PC Computers Diagnosing Equipment OWN A MACHINE SH The Smithy atm i OP tools in one easy to use benchtop machine Save time amp money For home or business Call for your FREE Info Pak 1 800 345 6342 FREE Operator PE77 or write Dept PE77 PO Box 1517 Smithy 2 RAIN FOREST RESCUE To HELP SAVE THE BIRDS OUTSIDE Your WINDOW Support Rain Forest Rescue Help put a stop to the destruction of the planet s rain forests To contribute to Rain Forest Rescue call 1 800 222 5312 The National Arbor Day Foundation S gy Remember only you can prevent forest fires Whaddya Say To A Guy Who s Had The same Job Al 6600 Al 2100 PHONE TAP Puont VIBRATING f For 50 Years DETECTOR MN j Ltrs cee a Sata DETECTS ETECTOR Has Never
299. ssible they compress the data from each image file You can take a lot of photos before running out of mem ory but the compression degrades the image quality Casio s 650 QV 100 for instance stores 64 compressed high reso lution pictures or a whopping 192 low resolution photos Other digital cameras have enough built in RAM to store a small number of high resolution pictures but also use removable memory cards Kodak s DC50 priced at 1000 stores 7 high resolution medium resolution or 22 low resolution photos in 1 MB of inter nal RAM it also accepts CF cards You can remove a Storage card that s full and insert a new one without having to pause and download the images to a PC Downloading is another factor to con sider It should be but isn t always a quick and easy process Downloading an image can take as little as two seconds or as long as a minute The time factor depends on the type and amount of com pression used the more an image is com pressed the less time it takes to transfer it as well as the software driver supplied with the camera Once the images are stored in your computer the fun begins Popular digital image processing programs like Adobe PhotoDeluxe are included with many dig ital cameras Such programs allow you to touch up your pictures alter them artisti cally use them in cards and calendars and post them on the Internet Read on for close up looks at the Olympus D 2
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301. standard in the camera s electronic memory The process works admirably but there are some limitations in color reproduc tion In addition silver halide crystals are much more closely spaced than the pixels of even the highest resolution digital cam eras That results in a loss of detail that becomes particularly apparent in enlarge ments You can blow up a 3X5 image taken with a 35mm camera to II X14 inch size without any detectable image degradation On a digital photograph with a resolution of 640480 the image becomes pixelated it is possible to see the individual pixels on any size larger than 2 4 X 3 2 inches Why would anyone spend so much money on a camera that produced inferi or pictures How could market research firm Dataquest possibly estimate that close to 2 000 000 consumer digital cam eras will be sold this year The answer lies not in the camera per se but in its role as a gateway to the future Those of us who regularly use the Internet and online services find them liberating They free us from having to stand on line at the bank travel to a library to conduct research wait for snail mail responses to consumer inquiries or depend on some local kid to deliver our newspaper on time They allow us to communicate quickly and efficiently with far flung family members and friends and to leave messages for business con tacts without having to negotiate through voice mail systems Similarly a digital
302. t Photo or graphic manipulation tools are nothing new But MeraTools has cer tainly put a new spin on things with its Kai s Power Goo We examined only the SE edition special edition which usually means stripped that we received with the Snappy Video SnapShot We can t say how it differs from the full retail version but we can tell you how it differs from any other image manipulation program that we ve ever used Although we writers here at Gizmo are eeectcanaacia CMON far from being graphic artists we are somewhat adept at image manipulation In our work we sometimes have to crop images or touch up some color on occa sion Now however we also might find the need to create some cool birthday invitations or T shirt iron ons or whatev er strikes our fancy After all now that we have Kai s Power Goo we can do things that previously couldn t be done by mere mortals with the exception of those who work at TV studios and those real artists who are wiling to invest in serious image manipulation systems Kai s Power Goo which MetaTools calls a creative entertainment tool lets you do extraordinary things with digital images in seconds MetaTools claims that its user interface is revolutionary and intuitive Well it is different We were able to use it without opening the on disk user manuals in PDF format but not without a few stumbles along the way We ll readily admit that
303. t can be built for about one third the price This OUTPUT TO AMPLIFIER SEE TEXT Fig 5 This little preamp provides a transformerless match for low impedance micro phones and can drive most system amplifiers 12V OFF RESET t R1 sa l 4 7K p 1 2 WATT PHONE LINE C1 D2 D3 1 SE 1N4758A 1N4758A 56 VOLTS 56 VOLTS BELL TRANSFORMER 120VAC BACK DOORBELL Fig 6 If you need a device to mute your stereo when the doorbell rings then this door bell stereo mute circuit is for you design provides impedance matching for low impedance 50 to 150 ohm pro fessional microphones and sufficient voltage gain to drive a 1 volt RMS amplifier input The circuit is a two stage direct coupled op amps with the input transis tor Q1 ina common base configuration The input resistor R1 is chosen to match the microphone s nominal impedance and the feedback resistor R2 sets the closed loop voltage gain By deriving Q1 base current from the divider network connected to the emit ter of Q2 a high degree of DC feedback is established to compensate for com ponent variations and temperature coefficients Since the input and output signals are out of phase neutralization is unnecessary for stabilization constructed five of these units on a single circuit board The microphone complex was terminated in a patch panel and powered by a well regulated negative 24 volt supply Since 50 ohm
304. t enough wait time for even a total novice foxhunter The final problem turned out to be the easiest In order to toggle the SK function on or off simply tied one of the input port lines high or low and tested it with an AND function If the result of the AND was zero simply skipped the SK code lines with a branching func tion like so Idab porta andb 1 beq no_SK jsr dit jsr dit rest of SK code jsr dah No_Sk It was 1 30 AM I figured the rest could wait until morning The Fox is Alive The foxhunt was at nine o clock so had plenty of time to sleep It had been a struggle but had accomplished my objectives had built a foxhunt transmitter that could generate a Morse code ID an SK end of message signal and had variable time intervals and a switchable SK function Knowing absolutely nothing about micro controllers had generated tones controlled a transmitter read an analog value and read a switch all in five night s work With that all done hit the pillow and slept like a log So much in fact that slept right through the alarm I thought I d let you sleep for another hour or so honey you ve been up so late all week It is saturday you know Are you still having that ham radio thing today Yikes Quarter after eight leapt out of bed and bolted for the work shop hacked the end off an old mic cord and hooked up the audio line to the cord via a small elec
305. t the military has access to Even so Tripmate s accuracy is limited to 328 feet horizon tally and 512 feet vertically 95 percent of the time But because Street Atlas compares the GPS fix to road maps it usually knows exactly where you are Street Atlas lets you search for any city town or street and prints maps as well It costs 45 without the GPS receiver But if you have a notebook computer you d be crazy not to pur chase the software with the GPS receiver The GPS receiver connects to the serial port of a notebook PC You need at least a 386SX 33 and Windows 3 1 or higher 8 MB of RAM 8 MB of hard disk space SVGA graphics and a CD ROM drive to run Street Atlas But because the receiver connects to a serial port at least you don t need PCMCIA slots If your notebook com puter doesn t have a built in CD ROM drive or if you don t want to run a CD ROM drive continuously you can extract what you need from the Street Atlas disc to your hard drive using a portable CD ROM drive The GPS receiver is about the size of a Walkman stereo and it sits on the dashboard of your car It s powered by 4 AA batteries so it doesn t suck power off your computer s batteries The first time you start Street Atlas with GPS you must enter the state or province where you are In a few minutes the GPS starts tracking A green arrow marks your location and follows you through the map It also gives you lati tude and longit
306. ta FU o oimne copy protection Ii SRR Face cable TV Catalog I U oe TAI nitions Le I S WonconativeveRcaeee cae cm i E24 e Gold Video Connectors amp Cables Included We Now you can tune in your a i fedi aeie sail S0 ENN Vias z ponve RIE aa ii g Guarantee DR U onpremium CABLE TV EQUIPMENT ST ES N A a 5 p KABLEWORKS v ELLI reer rae J oww kableworke com METTA tT Metals i e I 2125 S 156TH CIRCLE OMAHA NE 68130 2125 S 156TH CIRCLE OMAHA NE 68130 New and Pre Owned Test Equipment Pre Owned Oscilloscope Specials B K Precision 1476 10 MHz 229 00 Great Starter Scope Tektronix 465 100 MHz 599 00 Tektronix 465B 100 MHz 699 00 Tektronix 475 200 MHz 799 00 Tektronix 475A 250 MHz 899 00 The Industry Standard of Oscilloscopes Dual Channel Calibrated Delayed Sweep Professionally Refurbished e Aligned amp Calibrated to Original Specifications 6 Month Warranty The Longest Available Model OS 9100P 899 00 Full 100 MHz Bandwidth e Dual Channel High Sensitivity e TV Synchronization Trigger aE REE SHIPPING e Calibrated Delayed Sweep ANYWHERE IN me US e Includes Two Probes 2 Year Warranty 2 3 AK amp Io BRCARECISION Model 4040 499 00 20 MHz Sweep Function Generator e 0 2 Hz to 20 MHz 5 digit LED Display e AM amp FM Internal or External Modulation
307. that can be used for at least two more years and the public gains a clean vehicle LeanPower LeanPower Corporation of College Park Maryland has also developed and patented an after market emission control system to reduce pollution from older cars and light trucks Ihe LeanPower sys tem controls the air fuel mixture so that the engine operates at the leanest air fuel mixture the engine can tolercte under most driving MODEL V1601 conditions See Fig 3 The leanest conditions minimize emissions The LeanPower closed loop feedback control system uses a sig nal processor the Lean 2000 chip see Fig 4 to keep the engine run EFFECT OF AIR FUEL RATIO ON EMISSIONS STOICHIOMETRIC EMISSIONS CONCENTRATIONS RICH AIR FUEL RATIO LEAN Fig 3 It is desirable to operate an engine a the leanest mixture ratio possible in order to keep hydrocarbon carbon monoxide and nitrogen oxide emissions at their lowest level ning at its leanest limit On carbure tated engines the engine is set up sc that the air fuel mixture is at sto ichiometric or perhaps slightly rich er The signal processor commands Continued on page 78 The LeanPower emission system installed on an old Volkswagen Beetle s91u01429 3 seindog 7664 ANF a gt ite Popular Electronics July 1997 on O M ulti disc changers remain the most popular form of compact disc player For some time the so called c
308. the actual value needed will also depend on the setting of R4 as well as R5 Once again here s where exper imenting will help find the optimum results CMOS The IC oscillator of Fig 5 uses a ver satile 4046 CMOS PLL IC in a simple variable frequency Square wave gener ator circuit The heart of the generator s circuitry is the IC s voltage controlled oscillator The circuits operating fre quency is determined by the voltage at soiuooe y Jeindog z664 ANF oO 12 OUTPUT Fig 5 This circuit uses the 4046 CMOS PLL IC to produce a variable frequency square wave generator E E yt E A ee ae fe OR PARTS LIST 0 FIG 5 5 i z Ci See text i C2 0 1 uF ceramic disc FAi i00 000 ohm y4 watt oo resistor e R2 1 megohm watt 5 resistor R3 50 000 ohm potentiometer gt IC 4046 Radio Shack ASU Z F 10870616 or equivalent Canoe o rate ree pin 9 controlled by potentiometer R3 and the capacitor C1 across pins 6 and 7 The maximum and minimum fre quency of the oscillator is determined by resistors R1 and R2 connected to pins 11 and 12 respectively The 4046 frequency range goes from less than 1 Hz to about 1 MHz depending on the external components With the component values shown in Fig 5 the oscillator will range from a low of about 100 Hz to over 10 kHz If we remove R2 leaving pin 12 open the frequency range is increased above 10 kHz
309. till able to modify the existing code to pro duce a workable Morse code rou tine As it turned out simply wrote subroutines to produce tones and spaces that were multiples of a basic unit In other words a dot was one unit long a dash was three units long a space between letters was three units of no tone a space between words was five units long all according to Morse code convention simply named these subroutines and called them as necessary to produce the desired code string For example to pro duce the SK prosign simply called these subroutines jsr dit jsr dit jsr dit jsr dah jsr dit jsr dah In other words jump to subrou tine dit return jump to subroutine dit return and so on This allowed me to string together the following code DE WB9RRT SK from my call sign end of transmission While not very elegant this got the job done Of course it only sent the code each time the board was turned on needed a way to have it repeat at a given interval While was working out the code subrou tines noticed that the Technolog ical Arts programmers had set up a bunch of variables and a timing subroutine To introduce a wait peri od all you had to do was the fol lowing loadx 25SECONDS jsr WaitX So just put the amount of time you want to wait in the X register and jump to the subroutine called WaitX It will dilly dally for 25 sec onds then return to the program put that code be
310. timedia presentation Multimedia applications by people like you can revolutionize educational and business applications as well as bring more FUN FUN FUN into your leisure computer activities icone a fo ol Mail coupon to Electronics Technology Today Inc i P 0 Box 240 Massapequa Park NY 11762 0240 Please send me my copy of Multimedia on the PC i PCP120 I enclose a check or money order for 18 95 to cover the book s cost and shipping and handling expenses NY state resident must add local sales tax Name l Address o l City State Zip All orders must be paid in U S funds only Sorry no l orders accepted outside of USA and Canada Please aad 6 8 weeks for delivery MA02 ge Electronics Supplement to Popular eri ee OS Don t rent Own Cable TV Descramblers We ll Beat Any Price eSame Day Shipping e30 Day Money Back Guarantee eCredit Cards C O D eOne Year Warranty Are you overpaying your cable company You are if you are leasing their equipment Forest Electronics Inc offers a complete line of New Cable Decoders and Converters that Have make and model number of equipment used in your area REPLACEMENTS FOR MOST SYSTEMS CALL TOLL FREE CD Electronics 1 800 684 9135 NO NEW JERSEY SALES Anyone implying theft of service will be denied assistance are fully Compatible with your cable system e All systems come with Re
311. tine a professor of electrical engineering at the Stevens Institute of Technology The method was called neutralization and Professor Hazeltine s circuit was dubbed the Neutrodyne In the Neutrodyne some of the RF amplifier s output was coupled back to MARC ELLIS Freed Eisemann and the Neutrodyne According to Alan Douglass Radio Manufacturers of the 1920 s Volume 2 copyright 1989 published by Sonoran Publishing 116 North Roosevelt Suite 121 Chandler AZ 85226 the Freed Eisemann company had its beginnings in 1921 with the introduction by Joseph Freed of an inexpensive crystal set out 8 16 C 4 Fig 1 Sorry This is the best NR 5 schematic lve been able to find but it does allow you to trace the basics of the circuit restore it as necessary Then we ll apply the proper filament and plate voltages hook up a speaker antenna and ground and see what comes out Why the NR 5 A lot of 1920 s manufacturers made three dialers Such sets typically in cluded five tubes two of which were used as RF amplifiers with inputs and Outputs tuned to the same frequency As was discussed last time a few dif ferent approaches were used to sup press the feedback and resulting oscillations that were so apt to occur when the simple triode tubes of the era were hooked up in that Manner Some manufacturers among them Atwater Kent Kolster and Freshman deliberately introduced inefficiencies or losses
312. tion except to observe that it does sound very interesting Darryl Barry wrote There is a unit that can demodulate digital transmis sions have used a working prototype of this unit on my scanner There are actually two units working in prototype stages One is a self contained unit that is already programmed and attaches directly to a scanner The second unit requires a notebook com puter SCSI card internal or external and software program He said that he is prepared to sell these units and invites interested read ers to get in touch with him If you wish to pursue this contact Darryl Barry Elite Security Professionals 33331 Old Yale Road 108 Abbotsford BC Canada V2S 2J6 His phone number is 604 859 4080 Cellular Modification Update Last issue we mentioned that some new scanner models manufactured after the FCC s April 1994 cutoff date for readily restored cellular bands still could be unlocked to hear cell phone calls if owners sent their sets to certain companies that knew how to do the job Possibly as a backlash to the taping of Newt Gingrich s cellular call that was then turned over to the media the FCC subsequently announced that compa nies are no longer allowed to offer that service Keep in Touch We need your frequencies log gings and circuit ideas Write to us at Scanner Scene Popular Electronics 500 Bi County Blvd Farmingdale NY 11735 a s31u01499 3 JeiNdog Z664 Ar
313. tion wiring supplies books and videos and much more k Packed with Pictures amp Diagrams Home Auromation Systems Inc Questions 714 708 0610 Fax 714 708 0614 e mail catalog smarthome com http www smarthome com smarthome Lowest Prices Guaranteed Pata s Wholesale Wholesale St of cubes and one piece units works on all major systems call us last for tne best price 300 753 7277 Electronic Are you NOVAVIBION e All Equipment New e Convertors amp Descramblers 30 Day Money Back Guarentee e 6 Month Warranty e Visa MC C O D Welcome KDE ELECTRONICS INC P O Box 1494 Addison IL 60101 Info 630 889 0281 HRS Mon Fri 9 6 CST Fax 630 889 0283 Sat 10 2 CST S91u01 98 3 JeINdOY 7661 ANF wh wh wh Di ital Entertainment GREAT VALUES ra d s AphaStar S A Compare to Cable AR S Fi eso ee i cee Fh z Y ed New Surveillance Devices Smoke Alarm Ultra miniature video cameras hidden in smoke and Table Clock alarm or alarm clock your choice Wide fieid of view Video Cameras and super 1 lux low light sensitivity Undetectabiel SC 600 TC 70 High quality B W with 420 lines of resolution for ultra sharp images jj pe Drect output of ee video and audio 1 89 95 ea Best price on surveillance cameras an ywherel Telephone Transmitter Kit hidden in dual modular adaptor Transmits both sides of conversation to any FM radio up to 1 4 mile
314. to preclude ambient light striking the photocell The power switch and LED2 can be mounted at any convenient location on the top of the enclo i E E SEE TEXT Fig 5 Install the parts in the printed circuit board guided by this parts placement dia gram When installing the components pay close attention to the orientation of the polar ized parts electrolytic capacitors transistors etc about five volts for a tenth of a sec ond and LED2 should flash Check Q1 D1 R14 R16 and C10 Try a new CMOS 555 chip and transistor Final Assembly When you are satis fied that the circuit is operating properly the two boards can be permanently stacked Place the transducer assembly over the cir cuit board and feed the remaining leads of LED and the photocell into their respective holes Allow 1 5 inch spacing between the boards and solder the leads in place Then take a short piece of insulated wire and make the ground connection between the two boards sure It is mandatory that no light from LED2 strike the photocell One way to accomplish that is to use black electrical tape to shield the bottom side of the LED Install the assembly into the enclosure Complete the wiring to LED2 S and the battery connector as indi cated in the schematic diagram Using the Heartbeat Machine Operation of The Heartbeat Machine is very simple Just turn power on and have the subject place an index finger into the enclosure so that
315. to the I O port location as this would dis rupt the other bits on the port For instance if want the second and third bits high would just write a 6 to the port binary 00000110 This sets the proper bits high but also sets all the other bits low which may not be what want In order to accomplish this properly need to use a bitwise OR operator In my case wanted to turn on the first bit of the port so used the following code TX_ON idab 1 orab portb stab portb rts Create a subroutine called TX_ON Load the value 00000001 in accumulator B Use the OR func tion and OR this with the value of Port B The new value will be in accumulator B By ORing the val ues know that the first bit will be a 1 no matter what is already in Port B and the rest of the bits will remain as they are Store this value back in the slot for Port B which will cause the output pins to toggle accord ingly Then return from the subrou tine rts Likewise to turn the bit off used the following TX_OFF idab 1 comb andb portb stab portb rts The TX_OFF subroutine performs by loading the value of 00000001 in the B register This is then comple mented changing it to 11111110 This value is then ANDed with what ever is in Port B the first bit will become 0 no matter what is in Port B and all the rest of the bits will remain as they are This is stored back in portb written to the port and the subroutine end
316. took an aggressive stance organizing a group of New York crystal set makers into the Independent Radio Manu facturers inc for the purpose of filing counter suits But the point became moot when the Hazeltine breakthrough was so1uosoa y seindog 7664 Ajnr Q w Popular Electronics July 1997 oO gt cannot sopphy you write us weebyare CONDENSER AT ILATE 34 00 403 00 255 Fourth Avenue med i Ir yr f Tbe Now Maseltine Ve a AND DEPENDABLE PARTS FOR OTHER CIRCUITS ivf rali pr mi i 1 sia a tis wl a net ERNE l 1 tkr No sil Nai rm habla i ilavity aan ph a a ay Ppi ral iii Hilh le the Fi i it at nasti FIRST KLAN PANEL VIEW Ne Vaismeteri Mar Var ESSENTIAL PARTS for Hazeltine Neutrodyne Circuit 7 aay at ilar ty 74 pa re Shear is mci lont UR jamn far te tA bop Ghd a m n4 4s iv yw nja i siinon HIMI ARTICLES LIKTE li d sir ales hel lared Freed Eisemann Radio Comoration Pioneers in Radio Broadcast Reception CRYSTAL PE TAC TOR 70r alters even Me P 4 MODEL NR s isi 00 MODEL we 3 somupl i Ured i te malta rr it poit eqnvae err rad fl v4 MATE Ad J New York N Y a4 4 go F This 1923 NR 5 ad also featured component parts made by Freed Eisemann announced Now it was possible to leave crystal technology behind and make a good tube radio which previ ously could not be done without inf
317. transmitters amplifiers antennas secret books Electronically shields yourse and your box Also start your own radio station and more Send 1 00 new Super BulietiD Eliminator Lifetime guar antee 1 800 820 9024 to PAN COM INTERNATIONAL PO Box 130 P7 GIANT Saie i Original equipment de 00 Positive Paradise CA 95967 AWESOME Kits Voice changers levitators scrambiers from 1 Notch fitter Mon Fri 8 a m 5 p m Mtn Time 800 926 2488 303 499 5405 Fax 303 494 4924 internet http www siteleader com Catalogdepot AMCSC home htmI E mail amc sales siteleader com I 800 45 TEACH Popular Electronics July 1997 FREE catalog of fascinating electronics 3D ster eo detectors testers tesla jammers robotics much more QUANTUM RESEARCH 17919 77 Ave Edmonton Alberta T5T 2S1 HOME automation Ideas Ideas construction projects speaker switch vehicle detection inter active control speech recordings more Send 15 00 to CREATIVE CONTROL 937 S Leyden St Denver CO 80224 a eat Ralliart TS LASER show under 20 00 Laser and stereo with cassette oaio Plans tape 20 00 GLYDEWELL TECHNOLOGY P O Box 16853 Hattiesburg MS 39404 lasers gas sensors and more Catalog 1 00 18 00 E Z install cabie test activation chips e LNS TECHNOLOGIES 20993 Foothill Bivd boards for all models ic A Exter Suite 307P Hayward CA 94541 www ccnet com nal activator for all p v OPB
318. truction The Heartbeat Machine is made up of two parts the transducer assem bly comprised of a piece of unetched printed circuit material containing R17 the photocell and LEDI and a printed circuit con taining the amplifier and indicator circuitry The boards are stacked and separated by spacers and held together with hardware The transducer assembly is made up of a piece of unetched circuit board material plus three lengths of 3 44 Or iInch square plastic wood or metal rod The transducer assem bly layout is shown in Fig 3 Drill holes in the board at the locations shown for the photocell and LED For ease of assembly drill the holes for the LED and photocell ever so slightly smaller than those components so as to produce a snug fit Note Although not shown in Fig 3 there should be four mounting holes drilled in the transducer board matching the mounting holes in the amplifier board The easiest way to do that is to drill the mounting holes in both boards at the same time Once all of the holes are drilled mount the photocell LED and square rods and secure them in place using RTV silicone rubber epoxy or other adhesive The rods are placed so that they position the finger to rest squarely over the LED and photocell The larger hole is for the photocell and the smaller one is for the LED Cut the pieces of square rod to the length shown in Fig 3 The top of the LED should be l a inch above the cop
319. u mentation to make antenna measure ments Not to mention a Stoddard field strength meter mounted in a Taylorcraft airplane a kit built thing like a Piper Cub to fly around and make antenna pattern measurements Most ham antenna builders have to satisfy their curiosity about the pattern by noting where the call signs seem to come from when the new antenna is erected Unfortunately there are so many variables in that technique that it is utterly useless in making any real observations Another friend of mine lived down in the Shenandoah Valley of Virginia He complained that his omni directional vertical seemed to have a gap in the pattern He complained that signals to the east were a lot weaker than when he lived close to Washington DC and the signal reports he received were lower found the problem rather quick ly He lived on the west slope of a mountain down at the bottom of the hill Sighhhhh Hamfests The summer months are the ham fest season in most areas of the coun try My wife once referred to hamfests as a spasm of musical junk after the child s game Musical Chairs in which otherwise grown people go out to buy sell and trade all manner of ham related equipment lve even known a couple peopie who made a fair amount of their annual income buying and selling stuff I ve done my share of both although admit and my basement lab testifies that buying is more of what do If you ha
320. ubsidiary Opel as the Omega Designed in Ji 5 ee f Germany for a European market the Omega eye re was a natural choice for Cadillac to bring to these shores to compete with those pesky BMWs Volvos and Mercedes that have been stealing their piece of the pie for so long A few tasteful pieces of chrome upgraded upholstery and some snazzy wheels were all it took to transform this beautiful bahn stormer into Cadillac s near luxury sports sedan Cadillac i is neers MER iian this car may alienate traditional Cadillac ie tet Ase Catera g ani te eae iat has fate Titel ant Whit erme into deale ar sper mation A S prone Guides pera Pail ORE lots of useful information like actual test drive reports of cars such as this Cadillac Catera as a percentage the number of pay ments and the amount of your payment in dollars Edmund s Buying Guides Interactive sites are not the only types of places worth your time on the Web We should never take for grant ed the power of information That s the benefit of visiting Edmund s Automobile Buyer s Guides An informed shopper is truly the best shopper especially when that consumer is planning on spending thousands of dollars The Edmund s site lets you choose from a few headings First there s the New Car listing Here you ll find the HTMLized version of Edmund s Com plete Updated New Cars Book Check out over 565 models including MSRP and dealer invoice prices standard
321. ude elevation heading and speed information This is a great toy for only 149 not to mention an extremely useful navigational tool but you can gauge it test it measure It monitor it record it project it extrapolate it computerize if wW eather W r Wizard it CIRCLE 162 ON FREE INFORMATION CARD COOK s INSTITUTE MARC SPIWAK TECHNICAL EDITOR WINDOWS MAGAZINE New Stuff New games from Microsoft abound this month with two sports titles two flying games a lizard game that s a bit more unusual and something to help plan trips To start off there s Microsoft Golf 3 0 the latest update to the now classic title It s now been redesigned for Windows 95 with instant hole ren dering an improved user interface and more Two new courses include Banff Springs and Harbour Town Microsoft Soccer for Windows 95 puts you right on the field with rich graphics and sounds ments field types and conditions as well as the usual unruly crowds Both titles will sell for 44 95 realistic player move People who have been using com EARN YOUR B S E E X DEGREE THROUGH HOME STUDY J Our Highly Effective Advanced Placement Program for experienced Electronic Technicians grants credit for previous Schooling and Professional Experience and can greatly reduce the time required to com plete the program and reach graduation No residence schooling required for qualified Electronic Technicians
322. ures ATMs Conferencing Phre contain up to 250 000 in cash aoe o m ht nn istory Glossary Diverters Extend PAGER BEEPER 29 tl age ers Loops REMOBS Bridging Heads amp Cans Optocom 3rd P and many MANUAL other cane methods pl 29 Describes in detail how Pagers work different types and uses i HACKING ANSWERING MACHINES SSE IUS DES advantages over and uses with cellphones and All the known ways j answering machines tips and tricks How Pagers are hacked an countermeasures Includes plans for a Personal Pocket Paging System xmitter and receiver are hacked to listen to and erase messages ad and to convert them into mini KW HR METERS How watt hour meters work calibration error modes many ANSI Standards etc Demand and Polyphase Meters imental results to slow and stop meters by others A real eye opener 25 Special All 3 above Only 59 BEYOND PHONE MIN COLOR BOXES CONTROL Fear increases over EM and ultrasonic mind control technologies especially implants Many more lies published than facts Secret agents are often used for reporting back to covert organizations Learn shocking 8 bi r CONS amp SCAMS 29 truth about this bizarre phenggnena 29 Most comprehensive sA C amp S available Details U N B E R au 100s their many variations and countermeasures STEALTH TECHNOLOGY 29 Every known police radar error stealth method
323. use he had trouble obtaining the parts he sought for a project published in a previ ous issue of Popular Electronics His gripe was that he had to go to several mail order sources to obtain all the parts The total cost of ship ping and handling from all the sources was excessive agreed with him until looked at the published article The author offered a kit of parts with PC board and the cost with shipping and handling was less than the reader s cost derived from several mail order sources guess for most of us the ultimate buying decision would have been simple without trau matic reaction The reader had a problem He had a few of the parts in his junk box and Saw no reason why he should purchase the same parts in a complete kit agree with the reader s reaction however you can t ask the kit sup plier to sculpture the kit set up so that selected parts are removed and prices lowered Most kit suppliers are either authors or small business es that would lose money should they provide the services of large elec tronic parts suppliers Even large suppliers say that you either buy the kit or the parts you require from their catalog You may very well over pay should you take the latter course Is there a solution to the parts problem Not for all cases but with a full junk box of spare parts you can save bucks Whenever visit a ham fest or computer show buy bags of resistors capacitors of all types chips of all types etc T
324. ust might be able to get a price quote as well That way you don t have to put up with an hour of hard sell to find out a car s too expensive for you at this time Want a new car 1997 Vehicles will provide you with an interactive way of finding what s out there right now First choose what kind of car or truck you re interested in then submit a form with your location AutoWeb will find a deal er close to you that can help you get just the right vehicle Used Vehicles provides you with several helpful ways to buy and even sell a pre owned set of wheels There are so many features under this link we ll have to spend a moment on each The Used Vehicles Listing presents you with as the name implies listings of all types of advertised used vehicles by region and make Have something particular in mind Use AutoFinder to search through all those used vehicles to find the ones that match your partic ular criteria For example you can ask for a listing of all Cadillac Eldorados costing between 5 000 and 12 000 from New York that are later models than 1986 if you can t find what you re looking for AutoAgent might be able to help It s a free service that sends you e mail when a vehicle matching your needs becomes available in the site s data base Maybe you d like instead to go down to a showroom Used Car Dealers will bring you to the pre owned areas of many of AutoWeb s dealers But perhaps the most useful
325. ut a foxy little portable microcontro generates Morse cod This microcontroller computer fundameni microcontroller desig as the core of custom thing to make the SK signal in Morse code dit dit dit dah dit dah may be some sort of shift register Chip and a clocking circuit and maybe Ga Excuse me gentlemen Aren t we forgetting something Oh boy it was Bruce the Public Service fanatic FCC Rules and Regulations clearly state that all transmitters shall be clearly identified either by Morse code or in plain English at an interval not to exceed ten minutes hope you foxhunters plan on hav ing a callsign tacked on the end of o r od OLLER KIT i x fe 7 intervals learning electronics mil software ncorporated 1gN those transmissions Randy walked over to the podi um keeping one eye in my direc tion I m sure that ll be no problem for Mr Electronics over there Well it s nine c clock Hearing no further business declare this meeting adjourned He rapped on the podium with his gavel and twenty eight hams jumped up and head ed for the coffee and brownies Hang on leapt to my feet You know the Morse ID part may be a little tricky Maybe we could do something else for the fox soiuosjoe a seindog 2661 AMF A 5 Popular Electronics July 1997 oi RO Maybe some remote control thing or maybe a IT was no use
326. utomap Trip Planner can help you get there for 44 95 just took a trip into the past with E M M E Interactive s Myths and Legends Volumes 1 and 2 which are available separately or as a set Volume 1 Monsters and Mythical Creatures deals with the Yeti Cyclops Leviathan Pegasus The Golem The Unicorn The Gorgons The Phoenix and more of the same Volume 2 Legendary Lands and Lost Cities covers The WHERE TO GET IT 4 2 DeLorme 181 US Route 1 South PO Box 298 Freeport ME 04032 1 800 452 5931 http www delorme com E M M E Interactive 1200 Summer Street Stamford CT 06905 203 406 4040 800 424 EMME z MicroProse 2940 Mariner Square Loop Alameda CA 94501 800 695 GAME http www micropros com Microsoft Corporation One Microsoft Way Redmond WA 98052 206 882 8080 htip www microsoft com games Tth Level Inc 4110 E Collins Bivd 122 Richardson TX 75081 972 498 8100 http www 7thlevel com Garden of Eden The Fountain of Youth Easter Island Atlantis The Bermuda Triangle and more These mythical creatures and lost lands are brought to life through photos videos animation text and a lot more If you re as fasci nated by these mysterious creatures and places as am you ll enjoy these titles Monty Python and the Quest for the Holy Grail on CD Rom takes you through the story with King Arthur interacting with nutty Pythonesque was just pl
327. ve receiver my first was a Knight Space Spanner enjoyed many hours of shortwave listening all through my teens on the Star Roamer oblivious to the fact that the BFO drifted image rejection was terrible etc As a collec tor now wish that I still had both sets and look forward to adding them to my collection some day have approximately 40 pieces of restored Heathkit test equipment most of which use constantly Poor solder joints as Mr Ellis experienced in the Star Roamer are common when restoring kits You are at the mercy of the original builder have on more than one occasion opted to simply resolder an entire unit thus eliminating any future problems Although have several modern receivers Icom R71a and Kenwood R1000 would much rather fire up one that glows whistles or uses no power Keep up the good work B M Des Plaines IL PAGER DECODER LEGALITIES ls it legal to use the Pager Decoder Popular Electronics March 1997 to decode messages other than one s own would think not because of the Communications Act of 1934 and the Electronic Communications Privacy Act of 1986 but would appreciate an expert opinion The article mentions police agencies that intercept pager Continued on page 10 TECHNOLOGY UPDATE How to make your car invisible to radar and laser egally Rocky Mountain Radar introduces a device guaranteed to make your car electronically invisible t
328. ven t done a hamfest then recommend that you find one and attend If you want to buy stuff then bring cash only dealers can accept credit cards Also be careful about being out in the sun am one of those who burn easily so use plenty of sun block lotion Most hamfests of any size will have amateur radio license examinations available although many of them do the exams the day before the ham fest You can contact the sponsors to find the exam schedule Also you can get a list of sanctioned events not all hamfests fall into that category but that doesn t mean that something is wrong with them from American Radio Relay League 225 Main Street Newington CT 06111 or e mail at HQ ARRL ORG Connections can be reached by snail mail at PO Box 1099 Falls Church VA 22041 or by e mail at carrjj aol com welcome your questions comments and suggestions a ELECTRONICS LIBRARY Continued from page 20 Subsequent chapters cover using the PC as a record keeper to keep track of station logs and other databas es as a design tool for antennas and other hardware and for control and caiculations using the internet to find ham information and using simple soft ware to log and enter contests Personal Computers in the Ham Shack costs 15 95 and is published by The American Radio Relay League 225 Main Street Newington CT 06111 1494 Tel 860 594 0200 Fax 860 594 0303 E mail pubsales artl
329. very few consumer priced digi tal cameras offer more than basic point and shoot features Serious photogra phers would sorely miss the lack of con trol over focus and exposure not to men tion the paucity or complete unavailabil ity of lens options Fourth and perhaps most important the picture quality of digital images 1s not quite up to par with standard photos All of them produce images that are adequate for viewing on a computer screen but prints are another thing altogether You can actually get better pictures from a 10 disposable camera than from a 500 digi tal camera The difference in picture quality is directly linked to the differences in tech nology between 35mm and digital cam eras Traditional cameras capture images on light sensitive silver halide film which can reproduce an almost infinite number of colors and tones Instead of film digital cameras use light sensitive chips called charged coupled devices or CCDs to collect images CCDs are semi conductor devices that convert light into picture elements pixels To create color information the light must be passed through red green and blue color filters The accumulated electronic information is sampled and converted into digital data which is then compressed and saved soluosjoa y seindog 7661 ANF N ar Popular Electronics July 1997 Fujifilm s DS 220 digital camera stores images on a PC card that conforms to the ATA storage
330. ves E Memory Systems Sed piw 0765359 34 95 Hardcover 036432X 29 95 Hardcover CABLE CARAVANS titt b BO Hardcover fht Intermct COMPLETE REFERENCE s Ls ee 882138X 32 95 0304122 17 95 J texvhinx ian Mews Making Rusts Bene 0717753 19 95 aia MPLIFIERS i 024247X 49 00 Hardcover 0380899 60 00 Hardcover 5869349 XxX 44 00 Hasdcover Counts as 2 field at savings of up to 50 cff the regular publishers priees If you want thet Main Selection do rothing and it wili be shipped avtornatically If you want another book or no book at all simply return the reply form fo us by the date specified You ll have at least 10 days to decide If you ever receive a book you don t want due to late delivery of the bulletin you can return it at our expense And you ll be digible for FREE BOOKS through the Bonus Book Program Your only obligation is to purchase 3 more books during the next 12 months after which you may cance your membership at any time PE797 so1u0sjoa y seindog Z664 ANF TF Phone 1 614 759 3666 8 30 am to 5 00 pm EST Monday Friday A Fax 1 614 759 3749 24 hours a day 7 days a week if card is missing write to the Electronics Book Club A Division of The McGraw Hill Companies P O Box 549 Blacklick OH 43004 9918 Ail books are softcover unless atherwise noted Publishers
331. y Alvin TX 77511 Electronic Parts Outlet 17318 Highway 3 Webster TX 77598 Washin gton Amateur Radio Supply Co 5963 Corson Ave Ste 140 Seattle WA 98108 If you d like to sell our magazine in your store Popular Electronics July 1997 please circle 180 on Free Information Card NS CHECKOUT Popular Electronics July 1397 THE DIMP WIRKE TKACCK Get a handle on those time consuming wire sorting or installation jobs with an easy to build two piece wire identification systeni BRIAN PLILER f N J Q 4 N f you have ever installed y g for electronic equip ra ipi ia fee such as telephones F intercoms PA systems home Ye A theater alarms or any type of multiconductor equipment you are probably familiar with the frustration that goes along with the territory If you re a profes sional wiring installer then you probably already have most of the modern equipment that is available to make your job a lit tle easier But if you are a hob byist or even a handyman who only occasionally must delve into the wiring maze that is part and parcel of modern electronic equipment you probably can t justify the cost of Soiudsoa y seindog 7661 ANF W Ww Popular Electronics July 1997 w pan 1 4 4011 5V 470K cme 1 4 4011 IC1 d 1 4 4011 Fig 1 The tone generator portion of the DTMF Wire Tracer is co C1 a 4520 dual synchronou
332. y Intemational Postal Money Order or check drawn ona U S bonk US single copy price 3 99 Copyright 1997 by Gemsback Publications Inc All rights reserved Hands on Electronics and Gizmo tredemarks ore registered in US ond Conoda by Gernsbock Publications Inc Popular Electronics trade mork is registered in S ond Canada by Electronics Technology Today Inc and is bicensed ta Gernsbeck Publications Inc Printed in U S A Postmaster Placss send address charges lo Popular Electronics Subscription Dept PO Bow 398 Mount Morris Ib6t0S4 9992 A stomped self oddressed envelope mus accompany all submited manuscripts and or artwerk or photographs if their return is desired shouid they be rejected We disclaim any responsibitity for the loss or damage of monwecripts and or artwork or photographs while in our possession or otherwise Asa service to readers Popular Flectronics publishes available plans or information reloting to newsworthy products techniques and scientific and techno logical developments Because of possible variances in the quality ond condition af materials ond workmonship used by readers Populor Electronics dis claims any responsibility for the safe and proper functioning of reeder buill projects based upon or from plans or information published in this magazine soluojoa 3 sejndod 7661 ANF woh N Popular Electronics July 1997 ON T PRODUCT COLLU DEPA July 1997 H E HORIZON 59 The Ultimate Electronic
333. y amplifier design performed up to the C maker s specifi cations Partly out of laziness and part ly out of the fact that most car audio uses 4 ohms did not record calcu late and rate performance into 8 ohms As I recall the results were approxi mately 14 watts per channel into 8 ohms measured at a maximum clip ping distortion of 10 I started listening tests with 8 ohm speakers because had 8 ohm speak er boxes but no 4 ohm speakers In fact to listen to 4 ohm speakers had fo put two 8 ohm boxes in parallel to KEEP IN TOUCH 7 Now there ara more ways than aver to contact us at Popular Electronics You can write ta Letters Popular Electronics 500 Bi Gounty Blvd Farmingdale NY 11735 Or you can send e mail to peeditor gemnsback com And don t forget to visit to cur Web site ab http www gernsback com LETTERS make a 4 ohm load Although it didn t blow out the windows driving 8 ohm speakers with this amp still got loud enough that I could not stand full vol ume for very long at a time hope this answers your question without causing further confusion Gary Clifton FOND MEMORIES restore radios and test equipment as a hobby and I am a regular reader of Marc Ellis Antique Radio column also love to build crystal sets and greatly enjoyed building the NBS set Mr Ellis recent restoration of the Knight Star Roamer brought back memories That was my second short wa
334. y confusing to figure out how to get all the functions to work on these gadgets But a recent software development in the pocket PC arena might lead to more people latch ing onto them and yet another windfall for Microsoft Windows CE is Microsofts new operating system for hand held com puters It brings with it all of the familiar ity of Windows 95 and some of its func tionality to the world of palmtop com puting If you re familiar with Windows 95 then you ll immediately be able to use one of these hand held PCs or HPCs Windows CE provides most of the tools you need on the road and it runs in a computer that can fit in your shirt pocket Of course the computers have to be designed to run Windows CE We look at a Casio unit Casio Cassiopeia Casio s new Cassiopeia has a suggested retail price of 499 for the Model A10 and 599 for the Model A11 depending on the con figuration you choose We tested one with 2 MB of RAM and 4 MB of ROM Model A10 It s also available with 4 MB of RAM Model A11 It has no hard drive it contains one Type PCMCIA slot an infrared port integrated sound and a tiny speaker a serial port and a data communication jack for equipment such as digital cameras The unit is powered by two AA batteries and a lithium ion battery provides backup power when changing the batteries An AC power adapter is optional Casio 570 Mt Pleasant Ave PO Box 7000 Dover NJ 07801 800 962 2746 201
335. y later Osterman indicates it is a commonly found model with a value between 40 and 80 depending on condition As looked a bit further down the page though saw a smaller photo a picture of my mistake an S 41W in its white metal cabinet Next to it was the caption The S 41W is very scarce and highly collectible model In good condi tion it sells for 100 to 150 Hey Fred you made my day Shortwave Receivers Past amp Present Universal Radio Inc 6830 Americana Parkway Reynoldsburg OH 43068 4113 19 95 is a great ref erence text and a fascinating read for anyone with an interest in SW receiver history covering in text and photos over 500 SW receivers from 70 Ameri can and international manufacturers And may you also find your own first SW receiver whatever it may be It s In The Mail Coincidentally this month have a letter from Robert Johnson of Ana cortes WA who also is interested in radios from an earlier era Pye looked in several radio shops at shortwave receivers Robert writes And wonder whatever became of Nordmende recall some years back at least Nordmende offered several models of so1udsjoa q seindog 7664 ANF kez Popular Electronics July 1997 mo RO first class receivers Now when ask salespeople in stores or on the phone they ve never heard of the brand don t plan to part with my radio funds until find out what if anyth

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