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Led help Galaxy 949

Discussion in 'CB Radio Modifications' started by Cct03, Sep 3, 2018.

  1. Cct03

    Cct03 New Member

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    i am installing a led to back light my meter on my galaxy 949 I don’t like the stock so I bought one and was going to wire to the board where is a good location to solder the wires????


     

  2. TheRealPorkchop

    TheRealPorkchop Certified Sith Pimp

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    See your other thread about this and it’s frowned upon to cross post and/or start multiple threads in multiple locations for the same subject.

    Welcome to the forum.
     
  3. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    Most LED's require a series dropping resistor. Which means you need to know how many milli-amps are required and what is the maximum.
     
  4. Robb

    Robb Yup

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    If your LED is hooked up to the positive side of the power switch and is getting around 13.8v. like the rest of the radio is, then a 680-1000 ohm 1/4 watt resistor will do just fine. The resistor needs to be hooked between the positive 13.8v and the anode of the LED otherwise it will fry.

    Look carefully at the inside of your LED clear lens, and you will notice that one side of it is shorter than the other. This is the positive side of the LED (the 'anode'). If you hook it up backwards, it will not work. An LED ('light emitting diode') is basically a diode, and diodes can only conduct current in one direction.

    [​IMG]
    http://led.linear1.org/1led.wiz
     
    #4 Robb, Sep 3, 2018
    Last edited: Sep 4, 2018
  5. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    Nice job ROBB!
     

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