In the previous section, we have introduced the principle and application of line tracking module and motor
driving. After that, combine the tracking sensor and module to build a line following car.
So at first what does line tracking mean? It refers to follow the line trajectory. You might often see some robots
always follow or track a black line.
It uses the tracking sensor to detect the black track on the pavement, and detection signal will feed back to the
micro:bit main board. Then micro:bit main board will analyze and judge the collected signals to control and drive
the motor in time, thus can adjust the car’s turning direction.
That is why the micro:bit car can automatically follow the black track, achieving the automatic line tracking
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