• Line tracking sensors are devices used to detect and follow lines or paths on the ground, also known as line follower sensors.


• Sensors work by detecting the contrast between the line (usually a dark line on a lighter surface) and the background. 




They typically employ either infrared (IR) sensors or optical sensors to achieve this.



IR Line Tracking Sensor:


• Infrared line tracking sensors consist of one or more IR transmitter (IR LED) and receiver pairs.

• The IR LED emits infrared light onto the ground surface.

• When the sensor is directly over a dark line, the emitted light is absorbed, and the receiver does not detect a reflection.

• When the sensor is over a lighter surface, the emitted light is reflected back to the receiver.

• By measuring the intensity of the reflected light, the sensor can determine if it is over the line or not.