Robot MOPS

MOPS is a small robot which generally bumbles around the floor and performs avoidance manoeuvres whenever it detects an obstacle in its path. MOPS uses a forward facing LED to illuminate its path and a phototransistor to detect light reflected from obstacles, as soon as an obstacle is detected MOPS goes into reverse and turns for a few seconds on its two wheels before setting off again in another direction.

www.elexs.de/robo1.htm