DC Motor Controller Circuit with NE555

A simple DC motor controller circuit with NE555 is shown here. several DC motor speed control circuits are revealed here however this can be the first one using NE555 timer IC. additionally to controlling the motors speed its direction of rotation will be also modified using this circuit.

A PWM circuit primarily based on timer NE555 is that the heart of this circuit. NE555 is wired as an astable multivibrator whose duty cycle will be adjusted by varying the POT R1. The output of IC1 is coupled to the base of transistor Q1 that drives the motor according to the PWM signal available at its base. Higher the duty cycle the typical voltage across motor will be high which ends in higher motor speed and vice versa. modification of DC motor direction is attained using the DPDT switch S1 that on application simply toggles the polarity applied to the motor.

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