DC MOTOR SPEED CONTROL CIRCUIT

Sepcifications

The main feature of the DC Motor Speed CONTROL is a 555 IC-based PWM circuit, designed to obtain variable voltage over constant voltage. Here is the procedure for PWM. 

Take a simple circuit, as seen in the following diagram. This circuit is easy to manufacture and requires a few low-cost components, including a power supply, DC Motor, 555 timer IC, resistors, capacitor, potentiometer, switch.