timer for van fan

Discussion in 'General Electronics Chat' started by puckie33, Jun 1, 2010.

  1. puckie33

    Thread Starter New Member

    Jun 1, 2010
    1
    0
    I need a circuit that at a simple switch on,till it is kept on will alternate the fan On for 2 minutes and off for 5 minutes.This to use as an extractor 12v fan motor to keep temperature in van low because of instruments.The idea is to switch this fan On while van is parked.I fitted this fan motor with a smallpiece of duct in the back of the van.Any ideas of a circuit'cause did not find any siutable with the 555.Thanks
     
  2. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    What your trying to do is feasible with the 555 timer. Have you taken a look at Bill_Marsden's 555 projects?
     
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