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 1The detection range of the sensor can be adjusted with potentiometer, little interference, easy assembly and use. 2It can be widely used for robot obstacle avoidance, obstacle avoidance car, assembly line, black and white line tracking and many other occasions. 3When 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;c 4Active 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 dete 5Sensor module output port OUT can be directly connected to micro-controller IO port, also can drive a 5V relay directly.