Arduino PWM DC Motor Speed Control

This is a demonstration of controlling a DC CPU Fan Motor speed using PWM (Pulse Width Modulation). With the potentiometer I am controlling the Duty Cycle of the Pulse Width Modulated signal and that signal goes into the base of the transistor, which actually controls the amount of current that flows in the motor.

Find a detailed Step by Step Tutorial how to do this in my Arduino Tutorial for Motors, part of my Arduino Tutorial Series.

 

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