Use a potentiometer to control the speed of a toy DC motor

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In this lab, you will use a potentiometer to control the speed of a toy DC motor from an Arduino. A typical circuit for controlling a DC motor from Arduino would be something like the following. Note that this circuit assumes you are using a small enough motor that it can be run from a 5V power supply. Larger motors will need their own power supplies.

Typical toy DC motor circuit with Arduino

You will have to develop your own Arduino code and your own potentiometer circuit in order to complete this lab.

  • make your own circuit and your own code
  • read the potentiometer into Arduino, and output a PWM signal to the motor based on that reading
  • see your ARDX kit motor documentation if you get stuck


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