Need a switch

Discussion in 'General Electronics Chat' started by xxredxpandaxx, Mar 30, 2011.

  1. xxredxpandaxx

    Thread Starter New Member

    Mar 28, 2011
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    If you look at this I want to put 3 different switches in place of the 3 different led groupings. These switches would switch on a different power source that would control a lot more than 4 leds maybe somewhere around 100-150 leds. But I can't think of a switch that would work if anyone does please let me know thanks.
     
  2. Jaguarjoe

    Active Member

    Apr 7, 2010
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  3. xxredxpandaxx

    Thread Starter New Member

    Mar 28, 2011
    22
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    ok so I have decided that my three power sources are going to be 12V and two of them are going to be anywhere between 740mA-888mA and the third one is going to be 600mA-720mA. So all I need to do is replace the 3904s with a different transistor and then hook up the power source and leds to that transistor?
     
  4. xxredxpandaxx

    Thread Starter New Member

    Mar 28, 2011
    22
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    If you look at this, this is the same thing I want to do but with a lot more leds.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Yes, that's basically what you need to do. The transistor will need to be a Darlington type though, as a standard transistor won't have enough gain.
     
  6. xxredxpandaxx

    Thread Starter New Member

    Mar 28, 2011
    22
    0
    could someone please show me what transistor I would need?
     
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