1. When the module detects an obstacle signal ahead, the green indicator light on the circuit board will light up, and the OUT port will continuously output a low-level signal.The detection distance of the module is 2~30cm, and the detection angle is 35.The detection distance can be determined via the potential.Adjust the potentiometer clockwise to increase the detection distance; adjust the potentiometer counterclockwise to decrease the detection distance 2. The sensor actively detects infrared reflection, so its reflectivity and shape are the key to the detection distance. Among them, the black detection distance is the smallest, and the white detection distance is the largest; objects with small areas have small distances, and objects with small areas have distances. 3. The output port OUT of the sensor module can be directly connected to the IO port of the single-chip microcomputer, and can also directly drive a 5V relay; connection method: VCC-VCC; ground wire-ground wire; output IO 4. The comparator adopts LM393, which works stably; the module can be powered by 3-5V DC power supply. When starting up, the red indicator light is on; With 3mm screw holes, it is convenient for fixed installation; 5. The comparison voltage of each module has been adjusted by the potentiometer before leaving the factory. Unless there are special circumstances, please do not adjust the potentiometer at will. Module interface description 1 VCC external 3.3V-5V voltage (can be directly connected to 5v single-chip and 3.3v single-chip) 2 GND external GND3 OUT Small board digital output interface (0 1) Material: PCB, Metal Color: Blue Package Included: 20pcs IR Infrared Sensors Only the above package content, other products are not included. Note:1. Please allow slight errors due to manual measurement. Please make sure you do not mind before bidding.2. Due to different monitors, the color may vary, please understand. Note:Hello, please pay attention to your shipping address when purchasing the product. If your receiving information (eg: name, street, house number, doorbell/email with no name, etc.) is incorrect, the order will not be delivered correctly.