need help

Discussion in 'The Projects Forum' started by christiaan, Feb 17, 2013.

  1. christiaan

    Thread Starter New Member

    Feb 17, 2013
    2
    0
    Hi. I am busy design a circiut, on the switch it need to be pressed once but it have to give a pulse of 12v three (3) times within one (1) second out. Can anyone help me, I tried everything. :confused:
     
  2. praondevou

    AAC Fanatic!

    Jul 9, 2011
    2,936
    488
    You want 3 pulses within 1 second. What is the width of these pulses?
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,011
    3,233
    You could do that with a 555 connected as an astable oscillator to generate three pulses per second, and a counter, such as the CD4017, to inhibit the astable after three pulses.
     
  4. christiaan

    Thread Starter New Member

    Feb 17, 2013
    2
    0
    praondevou:

    the width must be between 20 and 30 miliseconds each
     
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