5-30 minute countdown for decade counter

Discussion in 'The Projects Forum' started by cree247, Oct 3, 2010.

  1. cree247

    Thread Starter New Member

    Sep 1, 2010
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  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
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    You could add another 555 or a 556 as a one-shot, with 1M pot & 100 uF timing, connect output to counter clock 555 pin 4 reset. When start switch is pressed, counter circulates untill time runs out, counter stops. Need better definition of " shut off ".
     
    cree247 likes this.
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