Good day,

I would like to build my own simple and easy pwm modulator.

I was thinking with a 555 timer ic. i just want some thing simple that i can adjust the pwm duty cycle and then just put a transistor or mosfet on the power lien to the dc motor.

Does any one have or know of a simple and minimal circuit that i could use to do this.

Thanks

 

HERE's a simple PWM I used on a project posted here.
Pretty easy to build.

 

Here's one that I built last month; it worked well. Note that the BC547 is rated for a maximum of 200 mA.

 

Here's one that I built last month; it worked well. Iote that the BC547 is rated for a maximum of 200 mA.

What software did you use to draw the circuit?

 

What software did you use to draw the circuit?

DipTrace. There's a free version at www.diptrace.com.

 

You can also try this simple circuit....