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12v auto pump from 110v?

Discussion in 'Electronic Design' started by T-n-T, Dec 7, 2006.

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  1. DaveM

    DaveM Guest

    Absolutely, it's possible. But the first thing you need to know is how much
    current the pump draws when it's pumping.
    Connect the pump to an auto battery and use your multimeter to measure the
    current. Buy a wall wart that puts out 12 - 14 volts DC. The current rating of
    the wall wart should be AT LEAST the current you measured being drawn by the
    It's OK to go a bit higher than your measured current, but stay in the ballpark.
    IOW, if your pump draws 1 amp, get a wallwart with current rating of 1 amp to
    maybe 1.5 amps. If you get a regulated wallwart, the current rating doesn't
    matter as long as it's at least 1 amp (as in the example).

    Dave M
    MasonDG44 at comcast dot net (Just substitute the appropriate characters in the

    Some days you're the dog, some days the hydrant.
  2. Or use an aquarium air pump to drive an old-fashioned perfume atomizer.
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