Here, the NE555 timer IC is running in an astable mode in order to generate a free-running PWM square wave signal. The 555 timer IC possesses an oscillation frequency ranging from 670 to 680Hz. The heart of this circuit is a NE555 precision timer IC. As the amplitude of the motor always remains constant Another advantage is that the motor can be rotated much more slowly without stalling. As a result, the switching transistor has a reduced power dissipation giving it a linear type of control which results in better speed stability. Controlling a DC motor using PWM has an inherent advantage that the power loss in the switching transistor is always small due to the transistor being either fully “ON” or fully “OFF”. In this article, we will be focusing on How To Make A DC Motor Speed Controller using the pulse width modulation (PWM) technique. DC Motor speed control can be achieved by a wide array of electronic configurations. A DC motor speed controller is a simple electronic circuit that is used to linearly control the speed of a connected DC Drive/Motor by simply rotating an attached potentiometer.
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