Help velleman mk 111

Discussion in 'The Projects Forum' started by Molly, May 7, 2009.

  1. Molly

    Thread Starter New Member

    May 7, 2009
    2
    0
    Please can someone help with the pulse time and the dalay time .
    I want to adjust the pulse time to 1 minute and the delay time to 5 minutes. I
    Can send an email of the circut if it helps or the velleman web site mk111 showed the timer.
    Many thanks
    Molly
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
  3. bertus

    Administrator

    Apr 5, 2008
    15,648
    2,348
    Hello Molly,

    For longer timings you will need longer RC times.

    [​IMG]

    RV1 sets the pulse timing in combination with C3
    RV2 sets the pause timning in combination with C3
    Increase C3 to 680 μF and the max pause time will be about 6.8 minutes.
    increase RV1 to 220 K and the max pulse time will be about 1.5 minutes.

    Greetings,
    Bertus
     
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