In this 555 timer project, I have shown how to make speed control of DC motor using PWM with a 555 timer IC circuit. You can control the speed of any DC motors like 775 or 555 motors with this 555 timer circuit.

This 555 timer circuit also can be use as the LED dimmer circuit

Circuit of PWM motor speed control

Motor Speed Controller circuit with 555

The circuit is very simple, I have used 555 IC and some basic electronics components to make this speed control of dc motor using PWM.

Here I have used TIP122 NPN power transistor, but you can also use IRFZ44N mosfet.

The collector current of the transistor or drain current of the MOSFET should be greater than the DC motor MAX current rating.

CB Layout for PWM 555 Timer circuit

Required Components:

555 Timer IC

TIP122 NPN transistor (You can also use MOSFET IRFZ44N)

1N4007 diodes (3no)

5-mm LED

1k 0.25-watt Resistors (3no)

10k 0.25-watt Resistors (1no)

100k Potentiometer (1no)

100nF Capacitor (C2) (1no)

10nF Capacitor (C1) (1no)

Connectors

Zero PCB or cardboard

Tutorial Video on PWM Speed Control

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