Simple pwm modulator

Discussion in 'General Electronics Chat' started by Zapnologica, Feb 25, 2013.

  1. Zapnologica

    Thread Starter Member

    Jun 15, 2012
    41
    0
    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
     
  2. SPQR

    Member

    Nov 4, 2011
    379
    48
    HERE's a simple PWM I used on a project posted here.
    Pretty easy to build.
     
  3. tracecom

    AAC Fanatic!

    Apr 16, 2010
    3,869
    1,393
    Here's one that I built last month; it worked well. Note that the BC547 is rated for a maximum of 200 mA.
     
    Last edited: Feb 25, 2013
  4. SPQR

    Member

    Nov 4, 2011
    379
    48
    What software did you use to draw the circuit?
     
  5. tracecom

    AAC Fanatic!

    Apr 16, 2010
    3,869
    1,393
    DipTrace. There's a free version at www.diptrace.com.
     
  6. sheldons

    Active Member

    Oct 26, 2011
    616
    101
    You can also try this simple circuit....
     
    • PWM.pdf
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