This module provides a versatile infrared detection system solutions for automation machinery devices such as smart cars, robots. The sensor module is adaptable to ambient light. It has a pair of infrared transmitting and receiving tube. Transmitting tube sends out a certain frequency IR which will be reflected when detecting obstacles (reflecting surface) and received by receiving tube. After processing with comparator circuit, signal output interface outputs digital signal (a low voltage level signal). 

IR Infrared Obstacle Avoidance Sensor Module has a pair of infrared transmitting and receiving tubes.

When the transmitted light waves are reflected back, the reflected IR waves will be received by the receiver tube.

The onboard comparator circuitry does the processing and the green indicator LED comes to life.

The module features a 3 wire interface with Vcc, GND and an OUTPUT pin on its tail.

It works fine with 3v3 to 5V levels.

Upon hindrance/reflectance, the output pin gives out a digital signal (a low level signal).

The onboard preset helps to fine tune the range of operation, effective distance range is 2cm to 80cm.