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Tracer is a simple linefollowing robot that has the ability to follow light or dark lines. It is able to do this through taking advantage of four photoresistors. The amount of current alotted from each side is tested by the LM393P comparator and reacts respectavely to stay on track. The motors are powered by a set of PN2907A PNP transistors, a fairly simple set up. I also added motor feedback protection by adding some schottky diodes to the motors. (No need to fry a perfectly good comparator). I ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/tracer