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LED Pilot Light.

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  • LED Pilot Light.

    I bought the regular Fender jewel type light deal, but I don't have room for the whole assembly. But I can fit the jewel nut in there and make it work with an LED no problemo.

    What kind of current and voltage can these things handle? I don't know what kind of rating to select. It would be cool to run it off' the AC mains if I could.

  • #2
    Check this out.
    Link: AC-LED

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    • #3
      I did exactly that on something last week. Works like a charm! I don't think I used the bleeder.
      Don't believe everything you think. Beware of Rottweiler. Search engines are free.

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      • #4
        Use a "backlight" LED or use a few from a cheap flashlight (maybe 3 in a triangle) so it will be bright enough to shine through the jewel.

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        • #5
          That leaves the LED circuits directly coupled to the mains.

          Add a diode in series to block reverse, and a series resistor to set current, and run the LED off the 6VAC you already have.

          Calculate the resistor for maybe 10ma through the LED.
          Education is what you're left with after you have forgotten what you have learned.

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          • #6
            Yep....just use the heater voltage and a diode/current limiter. I had to do this recently on a little kit hi-fi amp I reworked for harp use.

            For use behind a jewel cover, i'd use either a non diffused red LED with either a clear lens or the "tinted" style with a pale coloring that you can still see thru. The jewel does the diffusing, so you want a "beamy" looking LED.
            The farmer takes a wife, the barber takes a pole....

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            • #7
              you could use a Supertex LR8 as an offline regulator! works to 450v!

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