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Discussion in 'Electronic Design' started by minski_wit, Mar 31, 2006.

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  1. minski_wit

    minski_wit Guest


    I am working on a project where i'm looking to deliver power from a
    12vdc, approx 10A, battery to a mechnical relay which will switch when
    i send a signal from my microcontroller.

    The catch is that, as most linear actuators need positive and negative
    voltage, so do mine..

    I am thinking i may be able to accomplish this if i use two mechanical
    relays but thats just a guess. I was thinking some kind of setup with
    an inverse amplifier but that certainly does not not manage such

    If anyone has any suggestions I would greatly appreciate it

    Thank You
  2. Tim Wescott

    Tim Wescott Guest

    Do a web search on 'H-bridge'. 12V at 10A is pretty tame these days.

    If you are bound and determined to do this with relays you could use a
    SPDT relay to turn things on and off, and a DPDT relay to reverse direction.


    Tim Wescott
    Wescott Design Services

    Posting from Google? See
  3. If you have a spare change over set of contacts on the relay, you can
    use this to switch the -12V. No electronics involved

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