I.R recievers

Discussion in 'The Projects Forum' started by Neil Groves, May 10, 2015.

  1. Neil Groves

    Thread Starter Member

    Sep 14, 2011
    I am building a high speed trigger project and i'm trying to use parts that I have in my spares box, I need an I.R detecting diode and have a couple but they are mixed with other clear package diodes in the same compartment in my box, they all look the same so is there a way to distinguish the I.R ones from the colour diodes since they are all in a clear package?

  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    Ohmmeter set to read megΩ. Red lead to cathode. Shine a uV source at the diode and see the change in reverse leakage. Use the ones that have the best response to IR.

    All will show some ability to detect visible light, but the IR ones will show much less sensitivity to visible illumination.
    Neil Groves likes this.