Fig. 3 shows block diagram of the time based speed control switch for DC motor. A 12V DC power supply with rated current sufficient to drive the Arduino Uno board and motor is used. The supply is ...

This type of control is termed as chopper control. We’ve described here a PWM based speed control circuit that smoothly controls the speed of general-purpose DC motors. Fig.1: Block diagram of PWM ...

The circuit diagram of the above physical circuit is as below. The turntable is controlled by a DC motor with a tachometer. The DC motor rotates at 1000 RPM when connected to a 12V input signal with ...