there is a pair of infrared transmitting and receiving tube of the IR sensor module, tube infrared emit a certain frequency, when the detection direction meets the obstacles (reflecting ), reflected infrared receiving tube, after the comparator circuit processing, green indicator light up, at the same time signal output interface to output digital signal (a low level signal) Adjustable distance: the detection distance of the infrared module is 2 to 30 cm, and the detection angle is 35 degrees, Function: the IR infrared obstacle avoidance sensor module can be applied in robot obstacle avoidance, obstacle avoidance car, line count, black and white line tracking, etc. Easy to use: the output port OUT sensor module can be directly connected to the microcontroller IO port, you can directly drive a 5V relay Application: the IR sensor module can be applied for 3-5V DC power supply modules; There is a red power indicator, Weight: 0.440924524 pounds, Manufacturer: Gishbjka