Function: 1. When the module detects an obstacle in front of the signal, the green indicator light on the board lights up, while the OUT port maintains a low signal output. The module detects a distance of 2-30cm, with a detection angle of 35°. The detection distance can be adjusted by the clockwise adjustment potentiometer, increasing the detection distance; counter-clockwise adjustment potentiometer, decreasing the detection distance. 2. The sensor uses active infrared reflection detection; the target's reflectivity and therefore its shape are critical to the detection distance. Black targets have the smallest detection distance, while white targets have the largest. Small objects in a small area are detected, while large objects in a large area are detected. 3. The sensor module's output port can be directly connected to the microcontroller's IO or can directly drive a 5V relay. Connection: VCC-VCC; GND-GND; OUT-IO. 4. LM393 comparators, stable. 5. The module can be powered by a 3-5V DC power supply. When the power is turned on, the red power indicator light illuminates. 6. With 3mm screw holes for easy fixed installation. 7. Board size: 3.2CM * 1.4CM. 8. Each module's threshold comparator voltage is pre-adjusted by the potentiometer. No special case, no adjustable potentiometer. PIN description: 1 VCC 3.3V-5V external voltage (can be connected directly to 5v and 3.3v MCU MCU) 2 GND External GND 3 OUT Digital output small board interface (0 and 1) Package includes: 10 * Infrared Obstacle Avoidance Sensor Module