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This first video is of the TOUCH sensor program that you should have found on the "Programming" page.
The program should run until it hits the TOUCH sensor on the wall. Then it should back up and make a turn. If all goes well, and you've already tested the turning, the program should make a nice 90 degree turn right at the wall. This second program is the SONIC sensor. The program is similar to the TOUCH sensor program, with the difference that you use the SONIC sensor and don't back up.
The program for the SONIC sensor should have your robot run until it is about 6 inches from the wall. Then without the need for backing up the robot should make it's 90 degree turn. REMEMBER to use your turning for each of the programs. Once you do the work once to figure out the correct turn, it's good for each time you need it. This third program is the LIGHT sensor program. This program is relying on something to be on the board where your robot is traveling. The programming will have the LIGHT sensor 'looking' for a change. When it sees that change...such as a line, or colored space on the board...the program will end the loop. This should make the next step happen, which if you followed the programming on the earlier page should mean your robot makes a 90 degree turn.
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