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optocoupler?

Discussion in 'General Electronics Discussion' started by burassu, Feb 25, 2012.

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  1. burassu

    burassu

    36
    0
    Jul 1, 2011
    Hi I am trying to switch a pair of leds strips of 12v each from a micro controller. Do I have to use an opto coupler ? how should I connect it , pls ?


    Tnks.
     
  2. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    Not unless you need/want isolation.
     
  3. burassu

    burassu

    36
    0
    Jul 1, 2011
    Yes i need to switch the 12v strips from the 8051 which gives 5v as output.
     
  4. burassu

    burassu

    36
    0
    Jul 1, 2011
    I have tried to connect a relay directly to the output but it is draining a lot of current
     
  5. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    why not a mosfet?
     
  6. burassu

    burassu

    36
    0
    Jul 1, 2011
    Can you please provide a circuit please ?
     
  7. jackorocko

    jackorocko

    1,284
    1
    Apr 4, 2010
    Last edited: Feb 25, 2012
  8. burassu

    burassu

    36
    0
    Jul 1, 2011
    tnks a lot
     
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