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LED down count

Discussion in 'LEDs and Optoelectronics' started by Viad, Feb 11, 2012.

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  1. Viad

    Viad

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    Feb 9, 2012
    Can anyone point the way to a simple circuit or ready made product for a Count Down Display 7 segment or individual leds 9 to 0
    I can provide pulses at 1 second intervals but I need a display. I have spent some time searching the net without luck
    thanks
     
  2. OLIVE2222

    OLIVE2222

    690
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    Oct 2, 2011
  3. Viad

    Viad

    29
    0
    Feb 9, 2012
    Yes thanks Olivier, that will probably do the job indeed, I will be triggering it at 1 sec intervals via a relay (Zelio smart relay) omitting the 555 timer, would I require de bounce ?
     
  4. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    Hi Viad,

    Yes, with a relay you should use a debouncing circuit.
    Olivier
     
  5. Viad

    Viad

    29
    0
    Feb 9, 2012
    Do you think that using the 555 as a debounce circuit would be as good/convenient as any other method ?
     
  6. OLIVE2222

    OLIVE2222

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    Oct 2, 2011
  7. Viad

    Viad

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    Feb 9, 2012
    Thanks for your help Olivier
     
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