Pwm Dc Motor Speed Controller Using 555 Timer

By using this circuit we can operate direct current motor by using 555 timer ic integrated circuit.

Pwm dc motor speed controller using 555 timer.

In order to buy all those speed controllers for a high price this tutorial will. If you have a motor that requires 12v to turn on but the rpm at 12v is too high for your application pwm will allow you to drop the speed of the motor as if it was seeing 3v for instance. A simple dc motor controller circuit using ne555 is shown here. Building projects using small permanent magnet dc motor for cars robots quads requires a speed controllers to make them work flawlessly.

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 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. Motor speed rpm is directly proportional to the supplied voltage. Pwm can be applied to dc motors fans leds etc.

I used 12v high torque dc motor which i powered using there 3 7v li ion batteries connected in series which give around 12v. 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. On this condition with few adjustment in circuit we can used the pulse width modulator. I hope you enjoyed this tutorial and learned something new.

In addition to controlling the motors speed its direction of rotation can be also changed using this circuit. In this part i will talk. Here we are going to see how to control the speed of the small dc motor using 555 timer. This circuit uses similar pwm technique to control motor speed and uses ic 555 to generate pwm signals.

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. A pretty cool circuit that allows you to control the speed of a dc motor of considerable size. 555 timer integrated circuit is only used is a stable condition.