This project introduces a simple and automatic line tracking system of a car based on Arduino microcontroller.This car ,regarding UNO as main control, detect

black line by IR photoelectric sensor and send the feedback to Arduino. Arduino will analyses the feedback signal and then control the driver motor to adjust the

car diversion. Finally the car is able to go around the black line automatically. In addition, you can observe the state of the car through keyestudio 1602 I2C

Module.

Principle:

1.Black absorbs most light. When the plane isn't black, most IR emitted by the sensor is reflected back. So the sensor output low level at 0.

2.When there is a sensor above black line, since reflectivity of black is small ,little IR is reflected back under demand that the sensor works. Therefore, the sensor

output 1.

3.We just need to know the output of the sensor is 1 or 0 with Arduino to detect black line.

4.Arduino control the motion of the car according to receiving signal. The system scheme is showed by following picture 1-1.

5.The system is composed of main control circuit, power supply, IR detecting module ,motor and driver module. The structure chart of the system is showed by

picture 2-1.

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