• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Build Electronic Circuits

Build Electronic Circuits

Electronics explained in a simple way

  • Start Learning
    • Basic Electronics
    • Digital Electronics
    • Circuits
    • Practical Skills
      • Printed Circuit Boards
    • Microcontrollers
      • Arduino
    • Maker Lifestyle
      • Podcast
    • Academy
  • About Me
  • Blog
  • Academy
  • Contact
You are here: Home / Circuits / A Simple 555 PWM Circuit with Motor Example

A Simple 555 PWM Circuit with Motor Example

June 23, 2022 By Jonathan Ortega Lobo 1 Comment

In this tutorial, you’ll learn how to build a 555 PWM Circuit. The 555 timer is one of the most popular integrated circuits for hobbyists. And one of the cool features is its ability to produce a PWM signal.

The circuit is fairly easy to make, and it can control a great variety of things, including motor speed and LED brightness.

555 PWM Circuit Diagram

Note: For VCC, you can use anything from 5V to around 15V. What to choose will depend mostly on the size of the motor you are using. If it is small, you can control everything with 5V.

Components Needed

  • 555 Timer IC
  • IRLIZ44N MOSFET (or any other n-type MOSFET with a suitable gate threshold)
  • 10 kΩ Potentiometer
  • 1 kΩ Resistor
  • 5 kΩ Resistor
  • 1 nF Ceramic Capacitor
  • 100 nF Ceramic Capacitor
  • 1N4001 Diode
  • Any DC motor

How the PWM 555 Circuit Works

The PWM 555 Circuit is known as an improved 555 oscillator. This is because it makes use of a couple of extra components to improve the output signal that the most common astable multivibrator circuit would give. It uses R1 and C2 to control the frequency of the signal. And you can modify the duty cycle with RV1.

With the duty cycle, you can control the average voltage in the output of the 555, which makes it a very functional analog controller for your projects. For example to control the speed of a motor or dim an LED.

In the example below, we’ll connect a motor.

How to Build the PWM 555 Circuit

Here you can see the circuit already built:

Here is a closer look, be aware of the placement of R1 and one of the diodes, which are placed in a way to not take too much space:

The Result

In this video you will be able to see the output of the PWM 555 Circuit, and how the duty cycle changes while changing the value of the potentiometer. It is also visible that the change in speed of the motor depends on the duty cycle.

Filed Under: Circuits

Reader Interactions

Comments


  1. JOHNNY BRIZE says

    June 30, 2022

    YOUR 555 MOTOR TIMER DOES NOT WORk
    in other words it sucks

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Search:

Footer

Topics

  • Basic Electronics
  • Digital Electronics
  • Circuits
  • Practical Skills
  • Microcontrollers
  • Maker Lifestyle
  • Newsletter Archive

Social:

  • Facebook
  • Twitter
  • YouTube

Products

  • Electronics Course
  • Other Products

Copyright © 2022 · Ohmify AS · Terms and Conditions · Privacy Policy