- The IR sensor module comprises a pair of infrared emitter and receiver tubes. The tubes emit infrared at a fixed frequency. When the emitted IR strikes a reflective obstacle in the sensing direction, it is reflected back and received. After processing by the comparator circuit, the green indicator lights. At the same time, a digital low level signal is output through the signal output interface. - Adjustable distance: detection range from 2 to 30 cm and a detection angle of 35 degrees. - Easy to use: The OUT sensor module's output port can be connected directly to the IO port of a microcontroller; you can directly drive a 5V relay. - Function: The IR infrared sensor module for obstacle avoidance can be used for obstacle avoidance in robots, obstacle avoidance in cars, line counting, black-white tracking, and similar tasks.