Pwm Dc Motor Speed Controller Using 555 Timer

555 timer integrated circuit is only used is a stable condition.

Pwm dc motor speed controller using 555 timer.

I used 12v high torque dc motor which i powered using there 3 7v li ion batteries connected in series which give around 12v. Motor speed rpm is directly proportional to the supplied voltage. Pwm can be applied to dc motors fans leds etc. Here we are going to see how to control the speed of the small dc motor using 555 timer.

By using this circuit we can operate direct current motor by using 555 timer ic integrated circuit. This is the first part of supposed to be a two part instructable about speed control of a dc motor using 555 timer ics meant to cater those who are still starting to make electronics a hobby and beginners like me in a way. Building projects using small permanent magnet dc motor for cars robots quads requires a speed controllers to make them work flawlessly. A pretty cool circuit that allows you to control the speed of a dc motor of considerable size.

On this condition with few adjustment in circuit we can used the pulse width modulator. In order to buy all those speed controllers for a high price this tutorial will. So now using the potentiometer we are able to control the speed of the dc motor or the pwm signal produces by the 555 timer ic. Many dc motor speed control circuits have been published here but this is the first one using ne555 timer ic.

I hope you enjoyed this tutorial and learned something new. For those who are not aware pwm or pulse width modulation is a modulation technique in where the width of the output pulse varies with with respect to time. This circuit uses similar pwm technique to control motor speed and uses ic 555 to generate pwm signals. In addition to controlling the motors speed its direction of rotation can be also changed using this circuit.

A simple dc motor controller circuit using ne555 is shown here. In this part i will talk. For bigger motors i am using 12v power supply with a dc jack standard dc jack the same that is used in arduino uno you can use smaller and bigger voltage within this range but remember about nominal voltage of your motor.