Advice on replacement LED please :)

Discussion in 'The Projects Forum' started by JimBanville, Sep 17, 2013.

  1. JimBanville

    Thread Starter New Member

    Sep 17, 2013
    3
    0
    Original part to be replace is a "SML1216W(D)". Its a dual color red and green led on the standby power button on a denon receiver. I'd like to replace it with a blue, single color that only glows when "on". Can someone tell me the voltage and amperage of the led? I'm fairly certain I will be replacing a 3 leg with a 2 leg. Thanks!!!!
     
  2. doug08

    Member

    Jan 30, 2011
    153
    2
    The LED you have, uses a common cathode. You will be switching to a single LED with 2 legs. The old dual LED uses only 2V to drive the LED, the blue uses 3-4V. First you have to pinpoint the correct legs to keep, and second you have to trace back from the LED to locate ia resistor. If you find it, you will need to lower the value of that resistor to allow more current into the blue LED. Test the voltage leading INTO the resistor, then divide that voltage by .015 to .02 to get the resistor value.
     
    Metalmann likes this.
  3. JimBanville

    Thread Starter New Member

    Sep 17, 2013
    3
    0
    Hmm? This may be over my head :(
     
  4. JimBanville

    Thread Starter New Member

    Sep 17, 2013
    3
    0
    Resistors.
     
Loading...