TH-03 User's Guide
Contents
1. Take great care when measuring temperatures near mains equipment If a sensor is accidentally connected to mains voltages you risk damage to the converter or your computer and your computer chassis may become live You should assume that the product does not have a protective safety earth Incorrect configuration or use of the device to measure voltages outside the maximum input range can be hazardous Repairs The unit contains no user serviceable parts Repair or calibration of the unit requires specialised test equipment and must be performed by Pico Technology Limited or their authorised distributors Copyright 2005 7 Pico Technology Limited All rights reserved thO3 en TH 03 User s Guide 2 2 2 3 Product information Specifications Conversion time 1 ms per active channel 1600 ms per reference conversion Input connectors FCC68 4 4 Output connector DE9F to computer serial port Power connector No external power supply required Environmental to 50 C 0 to 95 humidity NOT water resistant conditions Installing the driver Installation of the driver is done automatically when you install the PicoLog software Alternatively you can download the driver from our website at http www picotech com Connecting the TH 03 To use the TH 03 you should connect the its D connector to the serial port on your computer using the cable provided If you have a 25 way serial port use the 9 to 252. TH 03 Thermistor Converter User s Guide thO3 en 4 Copyright 2005 7 Pico Technology Limited All rights reserved l TH 03 User s Guide Contents iW a daoxo Urejelel pieeerpererorcprereeerter peer reerreerrs A E tenner A AAE 1 Vi OV GVIC AREIA E EE E T doshas robencesenaeieedecedestcusselecdosscaeTexededeibavsdenntnsdesbescobsvevecsbescesveeas 1 2 Legal information seseseseresesesesesrsesrersrererererereseseneseneseneseresesesesrererererererereresenesesenenenesereseseseseees 1 3 Safety warning eccsceeseesceeeseesseeeeseeeteesseeesceaseesseasseeseeeseessaceecnessceesaceeceessseaseesseasseeaseeeasees 2 2 Prod ctintormati on ss feces sesh cesei sh cose a E a EN tu eteedashuatecedceuevasteunedsdaceeedsetevescees 4 1 Specifications cseccsecseesseseseeesesesceesteesseessseaseeessesensesseessceesceacnesseeesaesscsessseeseeaseassceaseeseees 4 2 Installing the driver eseseseseseresesesesesssrersreserererereseseseseneseneneseneseonsenesesrerenesesereseseneseseneseseseseseeee 4 3 Connecting the TH 03 ccssessessessesetscssssssscsssscsseesssessssssssesssessssssssesseesseseseessseaseesesens 4 4 Principles of operation sssscesssessssssssssesssssssseseseseseseseseseseessessessssssssssssssssssssseseseseneseseaeseasaees 7 3 echnical reference ners eene rE E PEE a EEEE AEE E EES 8 1 Driver SUMMAary eeeeeseseeeererererererererererereseeesreererererererererenenenerererererer
3. thO3_set_channel void th03_set_channel unsigned short int port unsigned short int channel unsigned short int th_type unsigned short int filter_factor You should call this routine once for each channel that you would like to take readings from You can do this any time after calling thO3 open_unit The fewer channels are selected the more frequently these channels will be updated it takes about 2 seconds for reference resistors and 1 second per active channel Arguments channel specifies which channel you want to set the details for it should be between 1 and 3 th_type specifies what type of thermistor is connected to this channel Set th_type to O for Off 1 for ELO15 temperature sensor 4 for ELO31 light sensor 5 for ELO29 door switch See th03 h for an up to date list of sensor types The filter_factor controls the time constant of the filter Each time the driver takes a reading from this channel it updates the filtered value by adding a proportion of the difference between the measured and filtered values The filter_factor sets the proportion that is added A filter factor of 1 means add all of the difference effectively no filtering and 100 means add 1 100 of the difference very slow filtering A factor of 10 gives a time constant of about a minute when all channels are selected thO3_get_temp short int th0O3_get_temp long temp short int port short int channel short int filtered Once y
4. way adaptor supplied Next connect a ELO15 temperature sensor to CH1 Now to set up the unit with your chosen sensor do the following 1 Open PicoLog Recorder 2 From the File menu select New settings The Recording dialog box appears Recording method Real time continuous Action at end of run Stop 7 Restart delay fi Minutes I Use multiple converters Cancel Help th03 en Copyright 2005 7 Pico Technology Limited All rights reserved Product information 5 3 Click OK The Sampling Rate dialog box appears Sampling Rate X M Seconds I OK ee w as many as possble 4 Click OK The Converter details dialog box appears Converter details 5 From the Converter type drop down list select THO3 6 From the Port drop down list select the port to which the THO3 is connected and click OK The THO3 Channels window appears THO3 Channels Chi Unused Copyright 2005 7 Pico Technology Limited All rights reserved th03 en thO3 en 6 TH 03 User s Guide Double click on Chl Unused The Edit THO3 Channel dialog box appears Edit THO3 Channel X Name Crame L015 temperature Help Tl Filter Enable Filter Factor 10 Options From the TH Type drop down list select ELO15 temperature then click OK You are returned to the THO3 Channels window Ch1 Unused has become Channel 1 9 Click OK T
5. 0 1 C effect on the temperature reading Copyright 2005 7 Pico Technology Limited All rights reserved thO3 en 16 TH 03 User s Guide 3 9 Modem operation The TH 03 is normally connected directly to the computer but it is also possible to access the TH 03 via a modem using the Windows driver It is necessary to provide power to the TH 03 either by instructing the modem to provide power or by connecting a power supply directly to the TH 03 See serial port connections for information For some radio modems there is a delay between sending text to the modem and its arrival at the other end and a similar delay for the response from the TH 03 If for example the maximum possible delay is 150 ms each way 300 ms total the following text should be added to win ini so that the driver waits longer for each response THO3 Turnround 300 Note To comply with current legislation use only radio modems which comply with the RTTE directive thO3 en Copyright 2005 7 Pico Technology Limited All rights reserved Index 17 Index C Connecting the TH 03 4 Connections 14 D Driver routines th03_close_unit 9 th03_get_cycle 9 th03_get_temp 10 th03_get_version 11 th03_open_unit 9 th03_poll_driver 9 th03_set_channel 10 th03_set_ref_update 11 Driver summary 8 Drivers for Windows NT 2000 11 Installation 4 Introduction 1 L Legal information 1 M Modem operation 16 P
6. Principles of operation 7 Programming C 12 Delphi 12 Excel macros 12 HP Vee 13 LabVIEW 13 Linux 13 Visual Basic 13 Protocol 14 S Safety warning 2 Sensor connector 15 Serial port settings 13 Specifications 4 T th03_close_unit 9 th03_get_cycle 9 th03_get_temp 10 th03_get_version 11 th03_open_unit 9 th03_poll_driver 9 th03_set_channel 10 th03_set_ref_update 11 Copyright 2005 7 Pico Technology Limited All rights reserved th03 en 18 TH 03 User s Guide th03 en Copyright 2005 7 Pico Technology Limited All rights reserved Pico Technology Ltd The Mill House Cambridge Street St Neots PE19 1QB United Kingdom Tel 44 0 1480 396 395 Fax 44 0 1480 396 296 Web www picotech com thO3 en 2 10 07 Copyright 2005 7 Pico Technology Limited All rights reserved
7. programs like Microsoft Excel where the macro language is a form of Visual Basic More than one application can access the Windows DLL at the same time as long as the applications do not change the settings for channels that they are not using The following table specifies the function of each of the routines in the driver Routine Description S th03 open unit Open the driver to use a specified serial port s thO3 close unit Close the port ALWAYS DO THIS th03 driver Poll the driver not usually necessary th03 get cycle th03 set channel th03 get temp th03_set_ref_update th03 get version The normal calling sequence for these routines is as follows Open driver Set channels While you want to measure temperatures Get temperature End while Close driver On O E DUO th03 en Copyright 2005 7 Pico Technology Limited All rights reserved Technical reference 9 3 2 Driver routines 3 2 1 thO3_open_unit short int th03 open unit short int port J This routine specifies the serial port number with an TH 03 unit If you wish to use more than one TH 03 you should call the routine once for each TH 03 The port must be 1 for COM1 2 for COM2 etc The base address and IRQ information is defined within Windows so it is not necessary to specify a value This routine returns TRUE if the driver successfully opens the TH 03 3 2 2 th03_close_unit void th03_close_unit unsigned sho
8. your responsibility therefore to ensure that the product is suitable for your application Copyright 2005 7 Pico Technology Limited All rights reserved thO3 en TH 03 User s Guide 1 3 Mission critical applications This software is intended for use on a computer that may be running other software products For this reason one of the conditions of the license is that it excludes usage in mission critical applications for example life support systems Viruses This software was continuously monitored for viruses during production but you are responsible for virus checking the software once it is installed Support If you are dissatisfied with the performance of this software please contact our technical support staff who will try to fix the problem within a reasonable time scale If you are still dissatisfied please return the product and software to your supplier within 14 days of purchase for a full refund Upgrades We provide upgrades free of charge from our web site at www picotech com We reserve the right to charge for updates or replacements sent out on physical media Trademarks Pico Technology Limited PicoScope PicoLog DrDAQ and EnviroMon are trademarks of Pico Technology Limited registered in the United Kingdom and other countries Pico Technology acknowledges the following product names as trademarks of their respective owners Windows Excel Visual Basic LabVIEW Agilent VEE Delph
9. E AEAN FES AEE MACANTA EEA EENE 13 5 Lea bb VIEW AETIA AEA AENA E AINNE IESE S E IA E S AE AAEE 13 6 Agilent VBE IIITER PEENE AAE I E EEIEIEE ENSE IAEE INEA EREE I IE EEEIEE E TESA 13 7 Linux 5 Serial port settings eseeeseeeseeeserereresereresesesesesesroesrererererererereseseeesreenenenenesenesesesesrerererererenerenes 6 Connections eoe ee r rara EEE r EE KETENE EAT KENKERE ATASE SEA EAEE EANES A EAE ESKATE TUS EREE EEE 14 TL Protocol BEET A AA A E E 14 8 Sensor connector oiire a ie oases i Aaa AA Ea sds clvevenwadstetallececutudesduadtecevssatecss 15 9 Modem operation ccscecssesseesseeseeesseeeneeasenesceaseesseesseessecesseassecssesseessneescesaeeesessceesseeets 16 lS LE E EE R E AA E E A E are E A E A ET 17 th03 en Copyright 2005 7 Pico Technology Limited All rights reserved 1 1 1 1 2 Introduction 1 Introduction Overview The Pico TH 03 is a complete temperature measuring device for use with PCs and laptops Up to three channels can be measured per TH 03 using precision thermistor sensors from Pico Technology It can be used with the supplied PicoLog data logging program Alternatively you can use the TH 03 driver software to develop your own programs to collect and analyse data from the unit The TH 03 software provides all of the calculations necessary for thermistor curve normalisation The TH 03 is highly accurate and gives results to a resolution of hundredths of a degree to an accu
10. chnology or your computer supplier Connections The information presented here is necessary only if you wish to connect the TH 03 to the PC in some unusual way for example via a radio modem The TH 03 uses the following RS232 data lines pin connections as on TH 03 Held at a positive voltage gt 7 V to power the TH 03 4 DTR _ Held at a negative voltage lt 7 V to power the TH 03 The driver powers up the TH 03 by enabling RTS and disabling DTR to provide the correct polarity power supply If these are set incorrectly no damage will occur to either PC or TH 03 Protocol The TH 03 operates at 2400 baud with 1 stop bit and no parity The driver controls the TH 03 using the following sequence 1 Switch RTS on and DTR off to provide power 2 Wait for more than 1 second for the TH 03 to settle 3 Send a single control byte to the TH 03 4 Wait for the 2 byte response from the TH 03 Steps 3 and 4 are repeated for each measurement The TH 03 signals the end of conversion by sending two bytes most significant byte first No data should be sent to the TH 03 during the conversion as it may be lost or corrupted The commands are 0x01 get version 0x02 get low reference 0x03 get high reference 0x04 channel 1 0x08 channel 2 0x0C channel 3 The two references should be 20 082 and 43 773 respectively the actual values may differ by up to 500 The theoretical and actual reference values are used to ap
11. enestereeererererererererenerenerenerenee 8 PA Driver eliT O E E E RR a as 9 1 th03_open_unit seesesseeesseseeresreseeresrereeresreresreseereneereereneereeeeneereeeoseereneoreseereereseoresrerrereseereereseseenees 9 Pa IE ET E E E T E lave taatannsencs desl temeee 9 3 th03_poll_driver ssesessessesessesreresreseeresreresreseereseesesreneoreseesesrereoreneoresresesreseereereneoreneoreseeseoreeeosesrenen 9 4 th03_get_cycle PIPE PNEIS EP E AAE INISENISI EET E ONEEN ESI E EE PAENT ONAE EE ANTS 9 5 th03_set_channel vsccnaccawsu ncaa ean aa aaa aes 10 6 th03 _BOt_COMP eeseeseseeeseseseseseesesesessetsestsesesesessesesssesesessesesssesesecesseseseseseceeseacseneseeseseassesenesescaesentes 10 7 th03_set_ref_update POEPT PEEPI EIET IEEE PIERIS IEEE L AEETIS ET LEEA EIE 11 8 th03_get_version bed ewe OES I PEEN CONTEE IEP EN OIEI PEN COASSA PEEN ONEEN IY PENE ONPE E OTE SY PEEN 11 3 Windows XP Vista ccescsscescessessessesceseeseeseeseeseeseseeenessaseeseessaseceteseeseossssesseseesesaseneesesenenee 11 4 Programming ccsccseeesceeececeesceeseceeseeesceesenesceeseesseeeseeaseeaseessecaceesscessaesaceesseeesesaseeeseeets 12 EE e aE E A E E R E E A E E 12 2 Delphi OPEL IIIPRE RI PESTERI PANEI IIAEO EATER OSIIN SE EER EIA PONSE EIEEE ONET TENTO 12 BECO siscsivesceccsescsesssvcesecscsssasssasscecceceod esssevcnscodtcetessensteeseseveteaadsvecocecacessssavesensscoecseassseesccssacsasesestees 12 A Nistial Basit rererere ostien EEA a EE
12. he recorder view should now display the temperature Copyright 2005 7 Pico Technology Limited All rights reserved Product information 7 2 4 Principles of operation Thermistors The TH 03 uses thermistors to measure temperatures Up to three thermistors can be attached to each TH 03 A thermistor is a small bead of material whose resistance changes very markedly with temperature Standard thermistors are in a stainless steel tube about 50 mm long and 8 mm in diameter but other packages are available The resistance normally changes exponentially with temperature This exponential response is very difficult to deal with in a simple electronic circuit but it is very easy to use a computer to convert a thermistor resistance short into an accurate temperature measurement Reference resistors The TH 03 measures the resistance of each thermistor and also of two internal reference resistors It uses the readings from the reference resistors to adjust the reading form the thermistor to allow for small errors within the converter The software continuously takes readings from the selected thermistor channels and from the reference resistors As the readings from the reference resistors change very little it is possible to read the reference resistors less frequently so that the thermistors are read more often One consequence is that thermistor readings are not at equal short intervals unless reference resistor update
13. i Safety warning We strongly recommend that you read the general safety information below before using your product for the first time If the equipment is not used in the manner specified then the protection provided may be impaired This could result in damage to your computer and or injury to yourself or others Maximum input range The TH 03 is designed to measure voltages in the range of 70 mV Any voltages in excess of 30 V may cause permanent damage to the unit Mains voltages Pico products are not designed for use with mains voltages To measure mains we recommend the use of a differential isolating probe specifically designed for such measurements Safety grounding The ground of every product is connected directly to the ground of your computer via the interconnecting cable provided This is done in order to minimise interference If the PC especially laptop is not grounded reading stability cannot be guaranteed and it may be necessary to manually ground the equipment As with most oscilloscopes and data loggers you should take care to avoid connecting the inputs of the product to anything which may be at a hazardous voltage If in doubt use a meter to check that there is no hazardous AC or DC voltage Failure to check may cause damage to the product and or computer and could cause injury to yourself or others thO3 en Copyright 2005 7 Pico Technology Limited All rights reserved Introduction 3
14. is either turned off or set to update every thermistor reading cycle Filtering The TH 03 software includes a filter which eliminates errors caused by electrical noise You can use either the measured or the filtered value the filtered value is much less prone to electrical noise but it tends to lag behind if the measured value changes quickly The filter time constant is controlled by the filter factor The filter factor can be adjusted between 1 no filter and 100 very slow filter Note the filter time constant is also affected by the number of channels that are in use The more channels selected the slower the filter Copyright 2005 7 Pico Technology Limited All rights reserved thO3 en 8 TH 03 User s Guide 3 Technical reference 3 1 Driver summary The TH 03 is supplied with driver routines that you can build into your own programs Drivers are supplied for use with the following operating systems Windows XP Vista Linux Once you have installed the software the drivers directory contains the drivers and a selection of examples of how to use the drivers The driver routine is supplied as a Windows DLL The object files use Pascal linkage conventions and do not require any compiler run time routines They can therefore be used with most real mode and some protected mode C and Pascal compilers The Windows DLL can be used with C Delphi and Visual Basic programs it can also be used with
15. ou open the driver and define some channels the driver constantly takes readings from the TH 03 When you call this routine it immediately sets temp to the most recent reading for the specified channel in hundredths of a degree Celsius If a reading is available it returns TRUE otherwise it returns FALSE It will normally return FALSE for a few seconds after you open the driver until the driver has taken a reading from the specified channel Channel should be 1 for channel 1 2 for channel 2 and so on thO3 en Copyright 2005 7 Pico Technology Limited All rights reserved Technical reference 11 If you set filtered to TRUE the driver returns a low pass filtered value of the temperature The time constant of the filter depends on the value of filter_factor for this channel and on how many channels are active 3 2 7 thO3_set_ref_update short int th03_set_ref_update short int port short int update_interval This routine specifies how frequently the computer should take readings from the reference resistors for the specified TH 03 Normally it is not necessary to call this routine The following values are useful 0 turns off update make sure that you leave enough time for at least one reference reading before turning off update 1 takes one reference reading for every cycle of thermistor readings so each cycle takes the same amount of time 10 is the default value the computer reads the refe
16. ply a correction to the measured value thO3 en Copyright 2005 7 Pico Technology Limited All rights reserved Technical reference corrected 20082 measured low_ref 43773 20082 high_ref low_ ref The corrected value is then converted to a temperature using a lookup table The 15 following lookup table is for an ELO15 temperature sensor there is one entry in the table for each degree Celsius 0000 0001 0002 0003 0004 0005 0006 0007 0008 0009 0010 001 001 001 001 001 O01 001 001 0019 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 0030 0031 0032 0033 0034 0035 0036 0037 0038 0039 0040 oJ O O18 WN a a a H 29219 28840 28467 28099 27738 21380 wag hove sib 26690 26399 26027 29705 29392 25087 24789 24498 2421 4 23939 23671 2341 I 23158 2291 1 22013 22442 2221 8 22002 21790 21587 21390 21200 21016 20837 20665 20499 20339 20184 20034 19889 t9750 19616 19486 19360 3 8 Sensor connector SoS Se SON NS ON OS OR SONS A OS NO SS ORR a OS SOA a ON OR ON OR OS SOR Oe OR Ra Ree The TH 03 sensor input is fitted with an FCC68 type 4 4 connector Only two pins are used when facing the socket these are the left hand two pins Thermistor sensor cables can be extended by up to 100 metres at normal operating temperatures this will have a minimal lt lt
17. racy typically better than 0 1 C PicoLog and the drivers support up to nine TH 03 units under Windows This manual describes the physical and electrical properties of the TH 03 and explains how to use the software drivers For information about other facilities in PicoLog please consult the appropriate manual Legal information The material contained in this release is licensed not sold Pico Technology Limited grants a license to the person who installs this software subject to the conditions listed below Access The licensee agrees to allow access to this software only to persons who have been informed of these conditions and agree to abide by them Usage The software in this release is for use only with Pico products or with data collected using Pico products Copyright Pico Technology Limited claims the copyright of and retains the rights to all material software documents etc contained in this release You may copy and distribute the entire release in its original state but must not copy individual items within the release other than for backup purposes Liability Pico Technology and its agents shall not be liable for any loss damage or injury howsoever caused related to the use of Pico Technology equipment or software unless excluded by statute Fitness for purpose No two applications are the same Pico Technology cannot guarantee that its equipment or software is suitable for a given application It is
18. rence resistors every tenth cycle 3 2 8 thO3_get_version short int th03_get_version short int version short int POre This routine sets version to version number of the specified TH 03 The upper byte of the version is always 8 for a TH 03 the lower byte is the two hex digits of the version and release It provides a useful check that the link to the TH 03 is working correctly 3 3 Windows XP Vista The 32 bit Windows driver is the file THO332 d11 installed in drivers win32 directory If an application is unable to find the DLL try moving the DLL to windows system Copyright 2005 7 Pico Technology Limited All rights reserved thO3 en 12 TH 03 User s Guide 3 4 3 4 1 3 4 2 3 4 3 Programming C C C The C example program is a generic Windows application i e it does not use Borland AppExpert or Microsoft AppWizard To compile the program create a new project for an Application containing the following files thostes thoO3tes re th0332 1ib Borland applications or th03ms lib Microsoft Visual C applications The following files must be in the same directory tho3 h or th0332 d11 All applications C C programs can access all versions of the driver If adcll h or adcliw h are included in a C program the PREF1 macro expands to extern c this disables name decoration and enables C routines to make calls to the driver routines using C header
19. rt int port This routine disconnects the driver from the specified serial port If you successfully open any serial ports you MUST call thO3 close unit for each port before you exit from your program If you do not your computer may misbehave until you next reboot it 3 2 3 thO3_poll_driver void th03_poll_driver void It is not normally necessary to call this routine as the driver uses the timer to poll the TH 03 Some programs like Excel appear to block the timer and so it is necessary to poll the driver periodically whilst waiting for data 3 2 4 th03_get_cycle short int th03_get_cycle long cycle short int POreE This routine returns the number of complete cycles of readings taken from a particular TH 03 When you call thO3_get_temp it returns immediately with the most recent reading for the specified channel If you call it repeatedly it will return the same reading repeatedly until the driver takes the next reading from that channel If you wish to record values only when the driver has taken a new reading you can use this routine to find out how many complete cycles of readings the driver has taken then you can call thO3_get_temp only when a cycle has completed Note each TH 03 is polled independently so the cycle numbers for multiple TH 03s may not keep in step Copyright 2005 7 Pico Technology Limited All rights reserved th03 en 10 TH 03 User s Guide 3 2 5 3 2 6
20. s Delphi The Win subdirectory contains a simple program th03 dpr which opens the drivers and reads temperatures from the three channels You will need the following files to build a complete program th03fm dfm th03fm pas th03 inc The file THO3 inc contains procedure prototypes for the driver routines you can include this file in your application This example has been tested with Delphi versions 1 2 and 3 Excel The easiest way to transfer data to Excel is to use PicoLog If however you need to do something that is not possible using PicoLog you can write an Excel macro which calls the driver to read in a set of data values The Excel Macro language is similar to Visual Basic The example TH0332 xLS reads in 20 values of the channel 1 temperature one per second and assigns them to cells Al A20 thO3 en Copyright 2005 7 Pico Technology Limited All rights reserved Technical reference 13 3 4 4 3 4 5 3 4 6 3 4 7 3 5 Visual Basic The DRIVERS subdirectory contains the following files h0332 VBP th0332 BAS h0332 FRM LabVIEW The routines described here were tested using LabVIEW for Windows 95 version 4 0 While it is possible to access all of the driver routines described earlier it is easier to use the special LabVIEW access routine The th03 11b library in the DRIVERS subdirectory shows how to access this routine To use this routine copy th03 11b and
21. th0332 dl1l1 to your LabVIEW user 1lib directory You will then find the th03 sub vi and an example sub vi which demonstrate how to use them You can use one of these sub vis for each of the channels that you wish to measure The sub vi accepts the port 1 for COM1 the channel 1 to 3 the thermistor type 1 for standard The sub vi returns a temperature Agilent VEE The sample program th03 vee is in the drivers subdirectory It was tested using Windows 95 and Agilent VEE version 5 0 The example demonstrates how to read continuously from the TH 03 You will need to copy the following file to the program directory tho3 vh Linux A Linux driver is under development Please check the drivers section of the Pico Technology web site http www picotech com drivers html for availability Serial port settings The following table shows the standard serial port settings for COM ports Port Base address interrupt Standard com hrs o e eS o O COM2 com3 3E8 fa de facto COM4 com5e NO Copyright 2005 7 Pico Technology Limited All rights reserved th03 en 14 TH 03 User s Guide 3 6 3 7 Note On most computers it is not possible to use the same interrupt for two serial ports at the same time If for example you wish to use COM1 and COM3 at the same time it is necessary to use a Serial port card which can be set to an interrupt other than 4 These can be obtained either from Pico Te
Download Pdf Manuals
Related Search