Optocoupler?

Discussion in 'General Electronics Chat' started by rjjenkins, Jun 11, 2011.

  1. rjjenkins

    Thread Starter Member

    Apr 16, 2011
    102
    2
    Hello
    I want to use an optocoupler to switch on a piece of muscle wire and would like to check whether this is a sensible idea.

    The muscle wire has a resistance of 20 ohm and I am using a 12V supply (so the current will be 0.6A). It's being powered by 8 AA cells which can deliver this current.

    I want to switch it on using a remote control module that runs on 4.5 - 7V and has an output pin that goes high when activated.

    I could use a transistor and a relay but I don't want to have a relay because I want it to run silently. Is an optocoupler a viable alternative? If so what else do I need to make this work?

    Many thanks
     
  2. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,173
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    Might try a low side drive with an N ch. logic level MOSFET.
     
  3. #12

    Expert

    Nov 30, 2010
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    769-AQV102
    $6.46
    Mouser
     
  4. rjjenkins

    Thread Starter Member

    Apr 16, 2011
    102
    2
    This looks great but I can't find a UK stockist. Is there a more common component I could use?
     
  5. bertus

    Administrator

    Apr 5, 2008
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  6. RRITESH KAKKAR

    Senior Member

    Jun 29, 2010
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    Hi,
    what is mouser??
     
  7. rjjenkins

    Thread Starter Member

    Apr 16, 2011
    102
    2
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