Switch 12 volts using micro controller

Discussion in 'General Electronics Chat' started by bsfrye, Feb 26, 2009.

  1. bsfrye

    Thread Starter Member

    Feb 20, 2009
    23
    0
    I need to switch 12 vdc 10 amps on and off using 5 volts from a micro controller. I assume this is really simple - just not sure the best way to do it. Any ideas? Like I said, I am sure this is simple, I am just compeltely new to electronics.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    Is the 10 Amp load connected to ground or to the + 12 Volt powersupply ?
    May the driver directly connected to the micro or do you want isolation ?

    Greetings,
    Bertus
     
  3. bsfrye

    Thread Starter Member

    Feb 20, 2009
    23
    0
    it is actually a 12 volt dc motor. So I guess teh 10 amps is to power? I don't need anything fancy, I don't need to control speed, or direction, or anything... Just turn it on and off.... It is 12 volts, and draws 7 amp MAX current.
     
  4. bertus

    Administrator

    Apr 5, 2008
    15,645
    2,344
    Hello,

    Here is the isolated version I mentioned.

    [​IMG]

    The FET may be a IRF540 or something.

    Greetings,
    Bertus
     
  5. rabhishek91

    Member

    Feb 14, 2013
    51
    1
    Sir is it opto-isolator which you have mentioned in the circuit ?
     
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