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12v timed circuit ideas???

Discussion in 'General Electronics Discussion' started by Ngreenwv, Feb 22, 2013.

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  1. Ngreenwv

    Ngreenwv

    1
    0
    Feb 22, 2013
    I'm working on the fuel pump circuit of my rvs generator. I need the power coming to the 12v fuel pump to energize briefly about every 20-30 secs does anyone know of a simple way to achieve this any help much appreciated
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,157
    2,548
    Nov 17, 2011
    Use a 555 timer IC (Google for circuits) and a power MOSFET to drive the pump. Do not use a mechanical relay, it will wear out rather rapidly at that rate.
     
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