User Manual
Table Of Contents

41
Now, you should see the motor blade rotating.
Further Exploration
You can use buttons to control the clockwise and counterclockwise rotation of the motor
blade based on the previous lessons. Also you can apply the PWM technology to control
the rotation.
Summary
Through this lesson, you have learnt the relative principle and driving mode of DC motors,
as well as how to drive a motor by Raspberry Pi. You should also pay special attention to
the fact that a DC motor will greatly interfere with the whole circuit when it works, so you
need to adopt photoelectric isolation and provide separate power supply. A freewheeling
diode is also necessary for the whole system to work reliably and steadily.










