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8.4.2 Line Tracking Car
1) Description
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.
How does it work?
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
function.
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