LEGO Education Baby Toy computer control and robotics User's Manual
Contents
1. Me emn eon tmn em m 14 Inventor Level 2 Introducing modifiers flip direction jump amp land and random time functions At the top menu select Tools or Project depending on version and scroll down to Change Inventor Level Choose Inventor level 2 ROBOLAB Untitled 1 vi Diagram File Edit Operate Window Help Eme 1 Change Inventor level Interrogate Ri La Piano Player ROBOLAE Internet Server Select COM Port Me 1 Select Camera a ES Vision Center Your programming options now expand to include 3 new sub menus called Wait For Structures and Modifiers To return to the main functions palette select the white vertical arrow in the sub menu Functio ns Wait For Structures and Modifiers Select the Helo menu and scroll down to Show Context Help to find out what the icons do You can also place the icons on your screen move the mouse over a chosen icon and the information will automatically appear d 1 i Diagram how Context Help CEIA Lock Context Help CASI SHiFE L ls Window About ROBOLAB C Robolab Engine ri libY Rcx 1 5BeginEnd llb End vi eon eon Me em eb eo e emn Co eon e Co eb Co e eon ep Co Me em em m 15 Use your two motored vehicle as for Inventor level 1 1 Delete all icons between the start and stop lights Start by dragging the red traffic light icon further to the right s2. emn top em tm 23 Capturing Data The upload area allows you to upload data from the RCX to the computer and view iton a graph Data sets are uploaded from the RCX to ROBOLAB in the upload window All data sets are plotted on their own page in the upload area If data from more than one sensor is acquired when the RCX program is run upload opens a new page for each data set A window tells you how many data sets were uploaded All pages are listed in a Page Control Area of the Navigator Once the data is uploaded it appears in a plot in the upload area The plot is labelled with the sensor value on the y axis and time on the x axis The data display can be changed by selecting a new plot type Data sets plotted on the upload page are stored in bins More than one data set can be stored in the same bin Bins are designated by colour Selecting different bin colours is useful to separate the data from different sensors You can also name the bins and change their colour You have two options when capturing data 1 Download the program to the RCX and store it until you are ready to run and capture data 2 You can select a Direct Mode which downloads the program to the RCX and begins capturing data and showing it on the computer immediately Ideas for practicing your skills in Investigator Using different sensors for data logging there are unlimited ways to use Investigator Here are a few suggestions You want to find out the li
3. Introducing music task split loop and fork merge options At the top menu select Tools or Project depending on version and scroll down to Change Inventor Level Select Inventor level 3 Again the Functions palette expands One new sub menu called Music is now available and the Structures sub menu is expanded with three new features Fork Merge Loop and Task Split You can also choose random power level for outputs in the Modifiers sub menu The small black arrow at the top right corner of the Music icon indicates that the menu expands further Music Icon Fork Merge Icons BES mm Wait For Structures including Fork Merge Modifiers and Music Remember you can use the Help menu Scroll down to Show Context Help to find out what the Fork Merge Icons do You can place the icons onto your screen and move the mouse over a chosen icon and the information will automatically ap pear Introducing the task split command 1 Use your two motored vehicle as for Inventor level 1 2 Delete the program on the screen and copy the program string below This program asks the RCX to do two different tasks at the same time 3 Download the program illustrated below and try it out on the floor 18 At the upper string motors A and C turn clockwise wait for two seconds flip direction wait for another two seconds and then jump back to the yellow arrow and repeat the task The lower string continues to play six notes The program must be
4. ainer Fork The Container Fork is set to count the light being turned on five times So long as the value is below five the lower string is chosen The lower string turns on the lamp waits for one second turns off the lamp and waits for one second again The red Jump Arrow returns the program to the red land arrow This is repeated until the container has added a value of one five times after which it adds a final value that tells the Con tainer Fork to choose the upper string a sound is played and the program ends Introducing a different way to use the container commands combined with light sensor 1 Use your two motored vehicle Make sure the light sensor is connected to Port 1 On a long strip of paper draw 10 parallel thick dark lines with an identical distance of 5 to 10 cm 2 Delete the program on the screen and copy the program string below For this challenge you will need the Container Fork command to tell the robot to react to the value of the container 3 Download and Run the program illustrated here First make sure that the container is empty The motor is turned on and as soon as the light sensor reads a lower light value a value of one is added to the Container Fork When the sensor reads a higher light value the jump arrow returns the pro gram to the land arrow This is repeated five times after which the container adds a final value to the Container Fork which tells it to run the upper string and complete the pro
5. anels and dropping them into the programming window Each Inventor Level offers an increasing number of program ming options Inventor Level 1 Get to know the basic icons and how to string them together Use the LEGO model illustrated in the building instructions of your RoboTechnology Sets 9785 86 pages 17 24 or Team Challenge Sets 9793 94 pages 4 21 and page 24 See the illustrated overview of elements provided in each kit 1 Start ROBOLAB select Programmer Double click Inventor level 1 O INVENTOR Ww ROBOLAB Untitled 1 vi File Edit Operate Project Window Help gt Programming Window eon em e em eb eo Mm eon Co en e em eb Co e emn eo eon Me tmn em m 13 3 Click your mouse on the programming window it will either show you a black arrow a white hand a cable reel or a text editing function You can change the function of the mouse by pressing the Tab button on your keyboard NOTE You can also access these functions by selecting Window in the top menu and scrolling down to Show Tools Palette 4 Select the black arrow function and mark the icon after the green traffic light Click the left button on your mouse and press delete on your keyboard 5 Continue to select each icon and delete until you only have the green and red traffic lights left Note that you can also delete several icons by dragging the mouse across a selection and then pressing delete Click and dra
6. ange Inventor Level Choose Inventor level 4 This level gives you access to all the ROBOLAB programming icons and lets you make very advanced and complex pro grams You can explore the possibilities by using the Context Help menu or see the Using ROBOLAB guide which you can purchase along with the software Three new sub menus called Reset Containers and RCX communications appear Please note that there are an addi tional 8 sub menus in ROBOLAB 2 5 Container Icons Functions de wer Wait For Structures Music Modifiers and Container Icons e MAI Introducing Container Commands A Container is an icon that stores a value and tells the program when to send that value to another programming icon Within the Container the value can be multiplied divided or subtracted 1 Use your two motored vehicle Make sure the lamp is connected to output port B You will not be using the motor or touch sensor 2 Delete the program on your screen and copy the string below For this challenge you will need the Container Fork icon to tell the robot how to distinguish between the value stored in the container Container Fork Icon Me Men Me em e em e oo eo Mm eo em eo em e em Me em em 20 First the program must make sure that the container is empty this is just a precaution against readings that may still exist in the RCX from previous activities The Add to Container adds a value of one to the Cont
7. ator are the same as those found in Pilot and Inventor Levels with additional commands for data logging Students program their RCX to collect information After running their program they then upload the collected data via the Infrared Tower to ROBOLAB for further analysis and comparison we Ea de Students can use a Journal tool to i e Record hypotheses Record findings Add charts and data to support conclusions Publish results for an on screen presentation 3 3 A C SC aen Programming in Investigator The Program Area of Investigator provides five programming levels The first three levels are Pilot Templates Levels 4 and 5 utilise the flexibility of Inventor Programming The type of data captured depends on the sensor selected in the program Options include Touch Sensor Light Sensor Temperature Sensor Angle Sensor Hotation Sensor Generic Sensor for non LEGO sensors Navigator A Navigator tool is provided providing access to the following functions pictured clockwise Traffic Lights this brings you into the programming area The White Arrow this brings you to the upload area where you upload the data you have gathered The Buckets this brings you to a view and compare area for all the data you have gathered The Calculator this brings you to a computing tool where you use arithmetic calculations to compute your data Ce eon e ro Ge em eb Me eb eo Meo e Am emn Me eon em e
8. educational division Quick Start Guide bo computer control and robotics using LEGO MINDSTORMSTM For Schools www LEGO com education MINDSTORMS LEGO the LEGO logo and MINDSTORMS are trademarks of the LEGO Group 2004 The LEGO Group This guide is intended for all first time users of LEGO MINDSTORMSTM for Schools and the ROBOLAB software versions 2 0 or higher It is a brief guide that will help you to install the software and try out some of the basic programming prin ciples It is intended as a brief introduction You will need the ROBLAB User Guide to become fully conversant with the concept The guide is based on functions within ROBOLAB 2 0 We recommend that you carry out this program in two steps the Pilot Course followed by the Inventor Course Have fun You will need either a RoboTechnology Set or Team Challenge Set to complete this course Contents Installing ROBOLAB software and preparing the RCX brick and IR Tower Page 4 Installing Firmware Page 5 PILOT Course Estimated time needed 1 2 hours Pilot levels 1 4 Pilot Level 1 Turning a motor on or off Test Your Skills Stop the motor on time Pilot Level 2 Introducing lamp touch sensor and setting power levels Test Your Skills Vary power levels and change directions Pilot Level 3 Programming with two steps introducing light sensor and loops Test Your Skills Program a car to respond to light readings Pilot Level 4 Programming with multip
9. ets a darker reflection such as the edge of the table Then tell the car to move backward until you stop it by pressing a touch sensor We recommend that you program the car to move slowly Set the motor power level to 2 or 3 2 You could also program the lamp to be on when moving forward and off when moving backwards 3 To repeat this program you need to activate loop mode Select the pink arrow and select the loop icon See illustration below Y PILOT 10 Pilot Level 4 Programming with multiple steps At this level you can add extra steps to the process to make the program more complex When you open Pilot level 4 you will find a sample program with two steps To avoid confusion when making your first program you should delete step 2 Select the red arrow as shown below then select and delete To create extra steps select the button To scroll through the steps select the red arrows Test Your Skills Program a car to drive in a rectangle 1 Use the LEGO model illustrated in the building instructions of your RoboTechnology Sets 9785 86 pages 17 24 or Team Challenge Sets 9793 94 pages 4 21 and page 24 See the illustrated overview of elements provided in each kit 2 Program your vehicle to drive in a rectangle You will need to program seven steps Step one program both motors so that the vehicle runs forward Step two turn 90 degrees To make the model turn 90 degrees you will need to ask one mo t
10. g your red lights further to the right side of the screen 6 You now have space to select your own string of icons and practice linking them together T You can copy the suggested program below or select your own To link each icon press the Tab bar until your mouse becomes a cable reel Click on the right hand corner of one icon until it reads end and then click on the left hand corner of the icon you wish to connect it to until it reads begin and then release A pink connecting line should appear between the icons You have to continue linking in this way until the line of icons is joined up 8 If your connecting lines are black and white this indicates that they are not active Go into Edit on the menu bar and select Remove broken wires or press Control b which is a shortcut Then try to connect again using the cable reel 9 When all connecting lines are linked the white download arrow will become active and you can download the program to the RCX ROBOLAB Unt File Edit Operate 10 Copy the string illustrated below and download it to your LEGO vehicle Note that in Inventor level you need to insert Stop icons in order for the program to stop the previous instruction The program will turn motor A and C on in different directions wait for 4 seconds and then turn off all outputs before stopping Your vehicle will run in circles for 4 seconds eon em e em eb eo e emn Me en e em eb Co e em
11. ght and temperature conditions in a cave but it is too dangerous to go in yourself Send in an RCX rover instead Build and program a device to cool down your drink as fast as possible Include a temperature sensor to measure how long it takes to cool What is the speed of your car Use the light sensor mounted on an RCX car to track the distance traveled Construct a smart golf club It should keep track of the strokes you ve played by using a touch sensor to record each time you hit the ball Create a Weather Station data logging temperature humidity downfall Use the rotation sensor for measuring the speed of a non motor vehicle running down an inclined plane This guide is intended as an appetiser for newcomers to LEGO MINDSTORMSTM for Schools products If you want to explore the unlimited possibilities in ROBOLAB see the Using ROBOLAB guide which is provided in PDF format together with ROBOLAB software You can also find inspiration on the LEGO Educational Division website at www LEGO com education fin eon Me em e ro eb eo e eo Me e de eo Me eo en e emn top emp tm 24 LC N N N N en eon e em eb eo eb mo eb eo deb eo e emn Me ro em Eb Me Mes em Eni
12. gram 21 Ideas for practising your skills Create a robotic puppy dog with an appealing look and programmed behaviours that include movements and sounds Roaches do not like light Build and program a bug that turns and runs away when light shines on it Create a ceiling fan Create a garage door that opens automatically Create an automatic vacuum cleaner that turns when it hits an object or a lawn mower which remains on the grass using a light sensor and black tape to define the edge Construct a labyrinth and get your robot to follow the route or get out of a maze Construct a bumper car that changes direction every time it hits an object Compose your own melody and dance routine Congratulations You have now completed the second part of the Quick Start Guide to programming in LEGO MINDSTORMS for Schools For more ideas about how to use these skills in the classroom see the activity packs for the RoboTechnology or Team Challenge Sets or visit www LEGO com education MINDSTORMS for information about additional sets eon eon eon em eb eo Me emm e em em em Me em e em eb em Me m E tm 22 Investigator A general introduction This section is for information only and does not include training schedules Investigator extends the use of the RCX and ROBOLAB to include the creation of experiments that use programming data logging computation tools and documentation The programming tools in Investig
13. ing lamp touch sensor and setting power levels At this level you can work with output ports A and C set the power level and use a touch sensor 1 See building instructions Follow step 4a on page 28 attaching a lamp and touch sensor 2 If you are still in Pilot level 1 select Back and then select Pilot level 2 3 The motor icon must be set to run clockwise pointing right at full speed 5 4 The lamp should be set to the lowest power level 1 5 The touch sensor must be set to port 2 Select the icon indicating that the sensor is pressed in See program illustrated below 6 For this activity you will hold the touch sensor in your hand and press when you want the vehicle to stop T Download and run the program Y PILOT Touch sensor Test Your Skills Vary power levels and change directions Try making your own combinations by varying power levels for the lamp and selecting different directions for the motor Try the other touch sensor icon which reacts when the touch sensor is released This works for example when a vehicle drives over a raised surface where the touch sensor is pushed in then reaches a lowered surface where the touch sensor is automatically released Y PILOT Pilot Level 3 Programming with two steps introducing light sensor and loops At this level you can work with all three outputs and use the light sensor Furthermore you now have two programming steps You will need to use the red s
14. inistrator 3 Turn on the RCX by pressing the red On Off button 4 Place the RCX in front of the IR Tower the IR window of the RCX must face the IR Tower 5 Select download firmware It takes about 4 minutes 6 Select the Back button when the firmware has been successfully installed 7 Your RCX is now ready for programming in ROBOLAB DOWNLOAD FIRMWARE TEST RCX COMMUNICATION HIDE ADMINISTRATOR BUTTON NOTE If you remove the batteries from the RCX the firmware will be lost and you will have to download it again To keep the firmware when changing batteries you must first turn off the RCX then change the batteries within approximately one minute If you change the batteries one at a time you will have one minute for each battery Trouble Shooting Firmware If the firmware has suddenly been lost it may be lost on the RCX because two or more RCX bricks were in reach of the same IR Tower when the program was downloading Turn off the RCX bricks that you are not downloading to or keep them out of reach of the IR Tower Make it a standard procedure to turn off an RCX that you are not using This also saves bat tery life even though the RCX turns off automatically after 15 minutes Trouble Shooting Infrared Communication Strong light may interrupt the infrared communication Cover the IR Tower and the RCX brick High temperature may cause interruption Computer labs are often very warm place the IR Tower on the floor Mi
15. interrupted if there are several RCX bricks within reach of one IR Tower Therefore the IR Tower should always be set to short range when working with more than one RCX in a classroom General General Diagnostics Default Communication Mode te Infrared IR C Visible Light Link PLL Infrared Range i Short 7 Medium Long Enable long range infrared transmission Requires a high power USB connection and the tog will use more power than normal Uninstall Reset Help OR Annuller Anvend For the USB Tower adjust the setting in the Windows Control Panel Click the Start icon on your desktop open Control Panel select the LEGO USB Tower icon and set the Infrared Range to short To select the short range on the serial IR Tower move the switch to the left at the front bottom of the o Co ro o e em o de de my ms em de o my em us o o em em o EM Installing Firmware Firmware is the software you need to download to the RCX before using ROBOLAB to write programs You can always check if the firmware is installed on your RCX by turning it on If the display shows 00 00 firmware is installed If the first four digits are missing there is no firmware Display showing RCX with firmware no firmware installed installed To install firmware 1 Start ROBOLAB Select Start at the rear left hand corner of your screen Scroll up to programs and select ROBOLAB 2 Select Adm
16. le steps Test Your Skills Program a car to drive in a rectangle INVENTOR Course Estimated time needed 2 3 hours Inventor levels 1 4 Inventor Level 1 Get to know the basic icons and how to string them together Program a car to change direction on time Inventor Level 2 Introducing modifiers flip direction jump amp land and random time functions Program a car to repeat a program flip direction of the motor follow timing and play a sound Inventor Level 3 Introducing music task split loop and fork merge options Program two strings one driving the motor the other playing music Program a repeated sequence Inventor Level 4 Introducing container commands Program two strings using container commands to repeat a sequence Ideas for practising your skills Investigator A general introduction Page 23 Building Instructions Page 25 iii G GA GGAGDGBGAGGGEGGGaGahaRBas a LEGO MINDSTORMSTM for Schools uses the ROBOLAB software to write programs The ROBOLAB software runs on both PCs and MACs LEGO MINDSTORMS for Schools includes an RCX a programmable LEGO brick The RCX is a microcom puter with three output ports A B and C for connecting motors and lamps and three input ports 1 2 and 3 for connecting sensors ROBOLAB programs are downloaded to the RCX via an Infrared IR Tower The IR Tower is available with a serial connection COM port or a USB connection for 2 5 or higher versions only IR window To
17. o that you have enough space on the screen to build your program 2 Copy the program string shown below Note that the motor icon should not be predetermined to a specific port and that the flip direction icon is situated below the motor icons in the functions palette You now need to use new programming icons which tell the program to jump and land Jumping and Landing is a way to loop the program as seen in Pilot levels Looping means repeating the program continuously It is a good idea to begin saving the programs that you create See top menu under File Motor not Flip Direction Jump and Land predetermined 3 Download the program and run it NOTE Modifiers also need stringing together Motor modifiers must be connected to the rear left and power levels to the rear right The program turns motor A and C on at power level 3 waits for 2 seconds then flips the direction of motor C waits for 1 sec ond and jumps back to the red land arrow and repeats the program Your car should repeatedly move forward for 2 seconds and turn for 1 second Introducing Play Sound and Random Time functions 1 Use your two motored vehicle as for Inventor level 1 and the same program as above 2 You will now make the vehicle wait for random time instead of 2 and 1 seconds See program under point 6 on page 17 Random Time 3 Delete the two Wait For icons and insert the random time icon Remove bad wires illustrated as black and white as op
18. or to drive forward and the other to drive backward Step three move forward Step four turn 90 degrees Step five move forward Step six turn 90 degrees Step seven move forward and stop Download and run your program NOTE After finishing Step 2 you should download and test the program to determine how long it takes for the model to turn 90 degrees Note that the speed will vary depending on the age of your batteries Different surface types also affect turning speeds select a smooth surface for best performance Here is a possible solution for steps I and 2 Y PILOT Step 2 of 7 EXC Boe Congratulations You have now completed the first part of your Quick Start Guide to programming in LEGO MINDSTORMS for Schools For more ideas about how to use these skills in the classroom see the activity packs for the RoboTechnology or Team Challenge Sets or visit www LEGO com education MINDSTORMS for information about additional sets 12 INVENTOR Course Levels 1 4 Estimated time needed 2 3 hours eon em e em e umm e emn dem tmn em tn You are now entering a new world of programming where the principles learned at Pilot level are relevant but where many new features will be introduced Programming at this level is far more challenging and complex We hope that this intro duction will give you the confidence to get started Programming takes place by dragging icons from a number of function p
19. posed to pink using Ctrl b and insert new wires using the cable reel via the Tab button If you use ROBOLAB 2 5 right click the icon and choose replace The next icon you choose will be inserted and connected automatically eon em eon em eb Me e emn Me en e em eb Co e em Me eon eon tp em m 16 4 Select the Jump icon and the red traffic light icon by dragging the mouse across them Move them to the right now there is space for the Play Sound icon Insert it after deleting the wire between the Random Time and the Jump Icon If you use ROBOLAB 2 5 right click the wire and select Insert 5 Now insert 3 and 2 seconds as the maximum time default is 5 seconds using a numeric constant which is located in the Modifiers palette As soon as you have dragged the icon into the programming window you can write its value Alterna tively you can use the Tab button to access the Write Icon and then write the value in the numeric constant Write Icon The program turns motor A and C on at power level 3 and waits for random time between O and 3 seconds then it flips the direction of motor C and waits for random time between O and 2 seconds plays a sound and jumps back to the red land arrow and repeats the program Your car will move forward for 0 3 seconds turn for 0 2 seconds and play a sound repeat edly The sound is the same as that which the RCX makes when it has downloaded a program 17 Inventor Level 3
20. rrors and reflecting surfaces may cause interruption point the IR Tower in another direction but still facing the RCX IR window Serial IR Tower is not working Check that the battery is in place If download is still failing you can place the IR Tower and RCX under the green plastic storage box or a cardboard box This should efficiently eliminate interruptions If the computer doesn t detect the IR Tower you can use an automatic detection function Access via the front page of ROBOLAB Select Administrator select Select COM Port then choose Auto Detect PILOT Course Levels 1 4 Estimated time needed 1 2 hours Pilot Level 1 Turning a motor on or off 1 Connect a motor to port A on your RCX and turn the RCX on by pressing the red On Off button If you connect a wheel to the motor you will be able to see which direction the motor is programmed to run 2 Start ROBOLAB select Programmer and double click on Pilot 1 A default program will appear on your screen The motor icon offers you a left clockwise or right counter clockwise option 3 Place your RCX in front of the IR Tower Make sure the RCX is turned on NOTE that the RCX automatically turns off after 15 minutes 4 Select the white arrow button which is the download button A new box appears on your screen indicating that download is proceeding 5 Press the green Run button on your RCX a Is the motor running If not have you connected the wire to po
21. rt A b Is the wheel turning counter clockwise If not turn the wire connector on port A 180 degrees and press the green Run button again 6 Now modify the program so that the wheel turns counter clockwise for four seconds a Select the motor icon on the screen and change direction b Then select the time icon to change the time setting T Download your new program by selecting the white down load arrow and press the green Run button on the RCX o A aaa aaa G GG m a amp amp amp amp amp GH G Test Your Skills Stop the motor on time 1 Build a car driven by one motor See building instructions on page 25 Follow steps 1 to 4 2 Program the car to move forward for one second 3 Place a measuring tape on the floor and test how far the car travels in one second Repeat the test three times to calculate an average distance 4 Place a LEGO figure or other object on the floor next to the measuring tape at a distance equivalent to that covered in one second 5 See if the car travels the correct distance without knocking the figure over 6 Repeat points 3 4 and 5 changing the time to 2 4 and 6 seconds and calculate the distance to be covered each time Y PILOT NOTE This is a good classroom activity to try with several groups of children each performing the same task and compar ing results Let each group make a graph with time and distance and plot in their results Pilot Level 2 Introduc
22. stopped by pressing the Run button The vehicle will drive forward and backward while playing a melody Introducing touch sensor fork and merge and a specified number of loops 1 Use your two motored vehicle as in Inventor level 1 Attach a touch sensor making sure it is correctly connected to Port 2 with a long wire 2 Delete the program on the screen and copy the program string below You will need the Touch Sensor Fork icon to tell the vehicle how to distinguish between pressed and released Touch Sensor Fork The loop will be repeated 30 times The Touch Sensor Fork determines the direction of the motor If the yellow touch button is released upper fork Motor A and C will turn clockwise backwards arrow then the program waits for 0 5 of a second before playing a C note and returns to the Touch Sensor Fork icon The same will happen again until the touch sensor is pressed in The string below is now activated motors A and C will be turned on counter clockwise forward arrow wait for 0 5 of a second play an F note and return to the Touch Sensor Fork You can activate or release the touch sensor as often as you wish to observe how it changes direction After the upper or lower strings have been repeated 30 times the RCX will play a sound indicating that the program is complete Loop Icon set at 30 19 Inventor Level 4 Introducing Containers At the top menu select Tools or Project depending on version and scroll down to Ch
23. top sign to block a port that is not in use 1 See building instructions Follow instructions for 4b on page 29 attaching a light sensor and a lamp 2 Select Pilot level 3 3 Program the following Y PILOT 7 ha y a 4 Download the program to the RCX 5 Press the black view button on the RCX Continue pressing until the arrow in the display points to port 1 6 Hold the car in your hand Point the sensor at a light surface at a distance of about 5mm and press Run Then move around the room holding the sensor up to different surfaces As soon as the light sensor records a darker surface 5 less light than previously the motor will change direction Since you have programmed it with a loop it will do that continuously until you press the green button again Trouble Shooting Light Sensor If there is no signal red light on the light sensor when you connect it to the RCX this means that ports 1 2 and 3 on the RCX do NOT automatically recognise the sensors You must write a program where the light sensor is set to port 1 Download this to the RCX and run the program Now port 1 knows that it is connected to a light sensor You can turn the RCX off and on again and the light sensor will still work Port 1 i ea Cay em em em ER de de cay en ey ea em ER Test Your Skills Program a car to respond to light readings 1 Write a program in Pilot level 3 that makes the car move forward until the light sensor me
24. uch sensor Three input ports for connecting sensors Three output ports for connecting motors and lamps Serial COM port Infrared Tower requires a 9 volt battery Temperature sensor s i Plug for transformer adapter USB Infrared Tower Installing ROBOLAB software and preparing the RCX brick and IR Tower 1 Insert the ROBOLAB CD ROM in your CD drive and start the program Follow the installation instructions The installation will take up to 20 minutes DO NOT connect the IR Tower until told to 2 While waiting for the installation to finish you should insert 6 AA batteries in your RCX Remove the grey cover and place them according to indicators at the bottom of the RCX You can also use rechargeable batteries or a 9 12 volt LEGO trans former product number 9833 3 When the software has been installed successfully you should un tick the box Launch ROBOLAB so that you do NOT start ROBOLAB yet 4 Now you must connect your IR Tower to your computer Make sure ROBOLAB is shutdown before connecting the USB IR Tower ROBOLAB will NOT detect the USB IR Tower if you connect it while ROBOLAB is running If you have a USB IR Tower simply connect it to a USB port 5 If you have a serial IR Tower you must first insert a 9 volt battery before connecting it to a serial port COM port NOTE Infrared communication between the IR Tower and the RCX reaches up to 10 meters However communication can be
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