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Electrical guru's where are you?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BlazerBoy, Mar 24, 2000.

  1. BlazerBoy

    BlazerBoy 1/2 ton status

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    Electrical guru\'s where are you?

    I have seen many switch panels with and light emitting diode(LED) to indicate when it is on. I know you cant wire a (LED)directly into a 12 volt source, but I have seen it wired up with a resistor?? Does anyone know how to do this or what size resistor I would need?? I know you can buy lighted switches but I am interested in doing it myself. Thanks
     
  2. BlueKnight

    BlueKnight 1/2 ton status

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    Re: Electrical guru\'s where are you?

    Goto radio shack or norvac or someone like that and tell them what you want to do. Its been along time but I think 560 ohm resistor will work. took 4 years of electronics 15 years ago
     
  3. Blazer1970

    Blazer1970 1/2 ton status

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    Re: Electrical guru\'s where are you?

    About 1K will work pretty good with a 12VDC system. The higher the resistor value, the dimmer the LED will be. with a 1K resistor, the LED will draw about 10 mA when it is on.

    Tim

    1970 Blazer CST 4X4 350 SM465 NP205
    1987 Suburban 4X4 350
    1988 Chevy Pickup 4X4 350
     
  4. Michael

    Michael 1/2 ton status

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    Re: Electrical guru\'s where are you?

    Right on! A 1k (1000) ohm, 1/4 watt will do the trick. Make sure to observe the the polarity of the LED.

    Michael [​IMG] http://jmartin.net/parker/goose.htm
     

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