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Circuit Skills: PWM (Pulse Width Modulation)

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Uploaded on Jun 1, 2011

http://blog.makezine.com/?p=98982
Another clever trick from the world of electronics - Pulse Width Modulation is a simple method for controlling analog devices via a digital signal. It's also an efficient way to drive motors, lamps, LEDs & more.

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Top Comments

  • Korupshenv1

    Korupshenv1 3 months ago

    Collin......you are DANGEROUS with that soldering iron. You've got mad skills. Keep up the good work. All of us enjoy what you do.

    · 9

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  • LT89NL

    LT89NL 1 month ago

    No. A potentiometer is just a variable resistor. PWM is quite something different.

    · 5

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    in reply to Enduro5678 (Show the comment)

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  • PSRBF6

    PSRBF6 3 days ago

    No silly. A potentiometer (essentially a resistor) drops current. Whereas PWM is pulsing voltage up and down, square wave style.

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    in reply to Enduro5678 (Show the comment)
  • legoclockfreak710

    legoclockfreak710 4 days ago

    wow didnt you hear what he said? A pot would generate heat indicating loss in power. With pwm theres no loss!

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    in reply to Enduro5678 (Show the comment)
  • AvidAnnihilator

    AvidAnnihilator 1 week ago

    You can make sound with a pulse width modulator while with a potentiometer you can't.

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    in reply to Enduro5678 (Show the comment)
  • Jason Pick

    Jason Pick 1 month ago

    exvcept you can't get the same amount of power you can only put out around 5 volts with the 555, unless you put it in series with an amp, nevermind

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  • Jason Pick

    Jason Pick 1 month ago

    TOTALLY AGREEEEE

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    in reply to CoolDudeClem (Show the comment)
  • Cameron Belt

    Cameron Belt 1 month ago

    yea but as he explained at the beginning of the video resistance causes unwanted heat and energy loss in the circuit

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  • armantamboli5722

    armantamboli5722 1 month ago

    Simply pwm increase efficiency

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  • armantamboli5722

    armantamboli5722 1 month ago

    Potentiometer has disadvantage that power is lost in terms of heat

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  • w0mblemania

    w0mblemania 1 month ago

    COME BACK COLIN, WE LOVE YOU.

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  • Darren Evans

    Darren Evans 1 month ago

    no a potentiometer reduces voltage by producing heat. this pulses a unchanged voltage.

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    in reply to nathan brown (Show the comment)
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