HALJIA 4-Channel Infrared Tracking Obstacle Avoidance Sensor Module 4CH IR Line Track Follower PCB Board Compatible with Smart Car/Arduino

When the module detects obstacles signal, red indicator lights on and OUT port continuous outputs low voltage level signals at the same time Effective detect range of 2 ~ 60cm, working voltage of 3.3V-5V. The detection range of sensor can be adjusted by a potentiometer,clockwise to increase and counterclockwise to reduce Target's reflectivity and shape is the key point of detection distance. Small and black objects have minimum detection distance, while large and white ones have maximum distance Output port can be directly connected to the SCM IO port, also can drive a 5V relay module or buzzer module directly,Connection: VCC-VCC; GND-GND; OUT-IO Widely used for robot obstacle avoidance, car obstacle avoidance, assembly line counting and black white line tracking