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photodiode testing

Discussion in 'General Electronics Discussion' started by Dr. Arun Joglekar, Dec 1, 2009.

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  1. Dr. Arun Joglekar

    Dr. Arun Joglekar

    1
    0
    Dec 1, 2009
    I have purchased Silicon and InGaAs photodiode and wish to use these. To begin how do I test that they are working? Can I use a multimeter to check that these are not burnt/damaged? If so where I should attach the common(black) electrode-anode or cathode? Will multimeter voltage damage the PD?

    And can I use a multimeter to measure current output while pointing Si PD to bulb or Sun?

    Arun Joglekar
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    There are at least two ways to bias photodiodes, each with their own advantages.
    I'd not be afraid that a multimeter would be able to damage a silicon PD.
    I'm not familiar with the InGaAs characteristics, but the current output test is always safe.
     
  3. neon

    neon

    1,325
    0
    Oct 21, 2006
    you got it right use a multimeter on the hi scale there is usualy a 9v battery but that will not blow anything because hi res. however make sure of polarity otherwise it could damage it.
     
  4. eptheta

    eptheta

    188
    0
    Dec 20, 2009
    Multimeters won't harm it much (the silicon one). I've used mine to test my photodiodes. I had trouble measuring voltage for some reason, but resistance mode is accurate enough.
     
  5. heri.aza

    heri.aza

    3
    0
    Dec 31, 2009
    I use silicon photodioda for my proximity sensor. I ofter measure the photodioda in "on" and "off" circuit.
     
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