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Thread: LED voltage

  1. #1
    500+ This must be a daytime job



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    LED voltage

    Builders,
    I am trying to modify a real cessna (actually Heads Up Technology) warning panel for sim use. I am trying to figure out how much power I need to drive the lights. The unit itself is labeled 28v, but that seems high for the small diodes they are using. Anyone know how to test/check them?

    I can always just desolder them and add my own bulbs, but where is the challenge with that?

    Reid
    http://juneaucessnasim.blogspot.com
    N58243 (virtual)- Low and Slow...

  2. #2
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    Re: LED voltage

    Quote Originally Posted by AK Mongo View Post
    Builders,
    I am trying to modify a real cessna (actually Heads Up Technology) warning panel for sim use. I am trying to figure out how much power I need to drive the lights. The unit itself is labeled 28v, but that seems high for the small diodes they are using. Anyone know how to test/check them?

    I can always just desolder them and add my own bulbs, but where is the challenge with that?

    Reid
    Hi Reid,

    Does this help in any way? http://led.linear1.org/led.wiz

    Kind Regards

    Bernie.
    E8400 @ 3.0GHz, DDR2 Ram 800MHz 4Gb, Vista Home Premium 64Bit, MSI 9800GT @ 512Mb, Philips 22" LCD Widescreen, Cockpit Setup X 5 using Wideview and Widetraffic.

  3. #3
    500+ This must be a daytime job



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    Re: LED voltage

    Thanks Bernie. It may. I was hoping there may be some way to tell by looking at them. I will see if this sheds any light on the resistors on the board.

    Reid
    http://juneaucessnasim.blogspot.com
    N58243 (virtual)- Low and Slow...

  4. #4
    Warren fsaviator's Avatar
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    Re: LED voltage

    Reid,
    My memory isn't the best anymore, and it's been a while since I flew Cessna's but if I remember right, they had both 12 and 24V busses. some had 28V so it is plausible but I bet if you connect it to 12V, it will also work, just dimmer.

    Warren