1. Function: The IR infrared obstacle avoidance sensor module can be used for robot obstacle avoidance, vehicle obstacle avoidance, line counting, blackandwhite tracking, etc. 2. The IR sensor module is equipped with a pair of infrared transmitting and receiving tubes. The tubes emit infrared light at a specific frequency. When the detection direction encounters an obstacle (reflective surface), the infrared light is reflected and received by the tube. After processing by the comparator circuit, the green indicator lights up. Simultaneously, a digital signal (a lowlevel signal) is output through the signal output interface. 3. Adjustable distance: The detection range of the infrared module is 2 to 30 cm, and the detection angle is 35 degrees. 4. Easy to use: The OUT port of the sensor module can be directly connected to the microcontroller's IO port, and it can directly drive a 5V relay.