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 port 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. 7. Download your new program by selecting the white download arrow and press the green Run button on the RCX.
Test Your Skills - Stop the motor on time
1. Build a car driven by one motor. See building instructions - 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. NOTE: This is a good classroom activity to try with several groups of children, each performing the same task and comparing results. Let each group make a graph with time and distance and plot in their results.
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