Infrared obstacle avoidance module
 

The transmitting tube first sends an infrared signal, which gradually decays as the transmission distance increases. If it encounters an obstacle, it will form an infrared reflection.

When the reflected signal is relatively weak, the receiving detection pin outputs a high level, indicating that the obstacle is far away;

When the reflected signal is strong and the receiving detection pin outputs a low level, it indicates that the obstacle is relatively close.

Infrared obstacle avoidance modules are widely used in robot obstacle avoidance, sweeping robots, assembly line counting, and black and white line tracking.