Line Follower Robot
Ages: 10+
The concept of working of a line follower robot is based on the phenomenon of light. We know that white color reflects almost all lights that fall on it, whereas black color absorbs most of the lights. In case of a line follower robot, we use IR (Infrared) transmitters and receivers also called photodiodes to send and receive lights. IR transmits infrared lights. When infrared lights fall on white surface, they are reflected back and caught by photodiodes which generates some voltage changes. When IR lights fall on a black surface, lights are absorbed by the black surface and no lights are reflected back, thus photodiode does not receive any lights.