LEDs analog dimmed or pulse width modulated?

Discussion in 'General Electronics Chat' started by gina4eva, Oct 20, 2014.

  1. gina4eva

    Thread Starter New Member

    Oct 20, 2014
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  2. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    These are just the bare LEDs, the method of dimming them is up to you. PWM is better in many cases because of power efficiency and better brightness control. however, if they are used in a fast moving device relative to the viewer's eye, analog may be better because of the persistence of vision issues - the flicker is not noticeable over 80 Hz if stationary but faster movement can leave a trail (tail) of pulses - like the GM cars with LED tail-lights in the US.
     
  3. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Typically that question would be about the "LED driver" (constant current power supply) and not the LED itself as Gopher has already pointed out.
    Drivers accept either PWM (5V or 10V PWM), Analog (1-10VDC), or resistance (100k potentiometer) dimming "signals"..
     
  4. gina4eva

    Thread Starter New Member

    Oct 20, 2014
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    What's Ward Cunningham's theory? (I know he invented "the first wiki" but what's the theory? That someone on the internet will catch and fix your mistake?)
     
  5. wayneh

    Expert

    Sep 9, 2010
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    You mean this?

    "The best way to get the right answer on the Internet is not to ask a question, it's to post the wrong answer."
     
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  6. gina4eva

    Thread Starter New Member

    Oct 20, 2014
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    Thank you! I appreciate it.
     
  7. gina4eva

    Thread Starter New Member

    Oct 20, 2014
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    Thank you!
     
  8. gina4eva

    Thread Starter New Member

    Oct 20, 2014
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    Haha nice. Thanks!
     
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