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Thread: How Test Supeflux LEDs without LED Tester

  1. #1
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    Default How Test Supeflux LEDs without LED Tester

    I've got my FAST setups coming today and realized, doh!, forgot to order an LED tester...

    I thought I read in a post previously someone was using a modified computer supply for this (but couldn't find it), and was wondering specifically how you would do that (I have modified a computer power supply and can easily hook up +12, -12, +5, or +3.3).

    I was thinking of just applying 3.3V or 5V across + and - but worried I'm missing the obvious and might need a current limiting series resistor or something...
    My multimeter has a diode tester so was thinking I could use that as well...

    Other alternative is just build the boards and see

    Just trying not to reinvent the wheel.

    Thanks in advance!

  2. #2
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    Default Re: How Test Supeflux LEDs without LED Tester

    Many (most?) multimeters have a diode check setting. That's what I use.

  3. #3
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    You don't want to connect directly to a power supply - it will smoke the LED. Use a watch cell battery and place the leads around the edges of it. It will take a bit of trial and error to find the correct orientation but once you do it goes quick.
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  4. #4
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    Default Re: How Test Supeflux LEDs without LED Tester

    Quote Originally Posted by tfischer View Post
    Many (most?) multimeters have a diode check setting. That's what I use.
    +1 what he said. Just use your DMM on diode check. Quick and easy.

  5. #5
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    Default Re: How Test Supeflux LEDs without LED Tester

    thanks guys!

  6. #6
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    Default Re: How Test Supeflux LEDs without LED Tester

    Quote Originally Posted by budude View Post
    You don't want to connect directly to a power supply - it will smoke the LED. Use a watch cell battery and place the leads around the edges of it. It will take a bit of trial and error to find the correct orientation but once you do it goes quick.
    +1 On the watch battery. Get a CR2032, cheapest and easiest LED tester ever...
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