The basic concept of 4-Channel Infrared IR Line Follower Sensor Obstacle Avoidance Module is to transmit the IR signal (radiation) in a direction and a signal is received at the IR receiver when the IR radiation bounces back from a surface of the object.

This 4 channels IR reflective sensor includes 4 IR sensors and main board to handle all the signals. Each IR reflective sensor is composed of an IR emitter and a receiver, if something is in the measuring range, the sensor would outputs related signal. There are also 4 potentiometers on the main board so that the measuring range can be adjusted as you wish.

Features:

Measuring range: Adjustable range from 1mm to 60cm, the closer the distance, the more stable performance, and white reflection farthest

Detection distance can be adjusted with potentiometer, clockwise to increase and counterclockwise to reduce

Output: TTL 0/1, when the sensor received the reflected infrared, the indicate LED light and output TTL 0, otherwise output the TT L 1, and the LED off.

Output port can be directly connected to the SCM IO port, also can drive a 5V relay module or buzzer module directly

Widely used in robot obstacle avoidance, car obstacle avoidance, assembly line counting and black white line tracking