Description:_x000D_ _x000D_ 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, green light is on and signal output interface outputs digital signal (a low voltage level signal). Detection distance can be adjusted with the potentiometer, effective distance range 2~60cm, working voltage 3.3V to 5V. _x000D_ _x000D_ _x000D_ Features:_x000D_ _x000D_ The detection range of the sensor can be adjusted with potentiometer, little interference, easy assembly and use. _x000D_ It can be widely used for robot obstacle avoidance, obstacle avoidance car, assembly line, black and white line tracking and many other occasions. _x000D_ When signal module detects obstacles ahead, the green indicator light on the circuit board is on and at the same time the OUT port outputs low level signal; detection distance can be adjusted with potentiometer, clockwise to increase detection distance;counter-clockwise to reduce detection distance. _x000D_ Active infrared reflection detecting sensor, so the target reflectivity and shape is the key of the detection range.Black color has the minimum detection range, white has the maximum; small objects have short detection range, large objects have long detection range. _x000D_ Sensor module output port OUT can be directly connected to micro-controller IO port, also can drive a 5V relay directly. _x000D_ Comparator uses the LM393 chips, stable performance. _x000D_ Can use 3 to 5V DC power supply.When power on, the red power indicator light is on. _x000D_ Designed with 3mm screw holes for convenient fixation and easy installation; _x000D_ Each module has already adjusted threshold compare voltage with potentiometer well, so please do not arbitrarily adjust potentiometer. _x000D_ _x000D_ _x000D_ Specifications:_x000D_ Working Voltage: 3.3~5V_x000D_ Detecting Range: 2~30cm_x000D_ _x000D_ Detection Angle: 35 _x000D_ Wiring: VCC-VCC; GND-GND; OUT-IO _x000D_ Size: 4*1.5cm/1.5*0.6in _x000D_ Quantity: 5pcs _x000D_ Weight: 3g(approx.) _x000D_ _x000D_ _x000D_ Module Interface:_x000D_ VCC: External connection of 3.3V-5V voltage(can be directly connected to 5V micro-controller and 3.3V micro-controller)_x000D_ GND: External GND_x000D_ _x000D_ OUT: Digital output port(0 and 1) _x000D_ _x000D_ _x000D_ Package Includes:_x000D_ 5 x Modules