Pulse width duration?

Discussion in 'Homework Help' started by pfelectronicstech, Aug 25, 2012.

  1. pfelectronicstech

    Thread Starter Member

    Jan 18, 2012
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    I do NOT want the answer, I just want to be pointed in the right direction. Its a 500-HZ digital signal and duty cycle is 20%. What is the formula, or how do I get to the answer because I can't find it in my book? Thanks for the help again.
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    D = Ton/( Ton + Toff)
     
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  3. bertus

    Administrator

    Apr 5, 2008
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    pfelectronicstech and absf like this.
  4. cork_ie

    Member

    Oct 8, 2011
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    This NE555 PWM calculator should be of help
     
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  5. pfelectronicstech

    Thread Starter Member

    Jan 18, 2012
    178
    4
    Thanks guys, I'm not fully understanding yet, and I'm not sure why. I'm gonna give it one last look in my books, and move on. Thanks again.
     
  6. Jony130

    AAC Fanatic!

    Feb 17, 2009
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    The answer is quite simple.
    For F = 500Hz and D = 20% we have
    T = 1/F = 1/500 = 2ms
    D = Ton/T * 100%
    Ton = (D * T)/100% = (20 * 2ms)/100 = 400us
     
  7. pfelectronicstech

    Thread Starter Member

    Jan 18, 2012
    178
    4
    I got it now, thanks guys. It all came together in the end. Thanks again for the help.
     
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