3Pcs Infrared Obstacle Avoidance Sensor ForSmart Car RobotDescription The sensor module light is adaptable to the environment the working voltage of 3 3 V to 5 V It has a pair of infrared transmitting and receiving tube when detecting direction meet with obstacles reflecting surface reflected infrared receiving by the tube After the comparator circuit processing green indicator will light up at the same time the signal output interfaceoutput a digital signal a low level signal can be adjust the detection distance through the potentiometer knob effective distance range 2 80 cm easy to assemble and use So it can be widely used in robot obstacle avoidance obstacle avoidance car line count and so on many occasions Package included 3 xobstacle avoidance sensor