555 timer circuit

Discussion in 'General Electronics Chat' started by kevinj, Nov 26, 2012.

  1. kevinj

    Thread Starter New Member

    Nov 24, 2012
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  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    At switch on the cap C1 is discharged and so pin2 is triggered so pin 3 goes high, then the cap charges up through R1 and Vr1 until it reaches 2/3 of the supply 6V, then pin 3 goes low and pin 7 also this discharges the cap C1 until it reaches 1/3 supply 3V, then the cycle repeats over and over.....
     
  3. Wendy

    Moderator

    Mar 24, 2008
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