Measure power using photodiode

Discussion in 'General Electronics Chat' started by roboticvn, Aug 7, 2014.

  1. roboticvn

    Thread Starter Member

    Jul 9, 2014
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    I want to measure power emitted from an LED. Can a photodiode do this? For example, my LED emitted 1W. I want to measure power at 10cm distance in unit of W. I know photodiode only measure light intensity in unit of W/m^2. Can you help me? Thank you.
     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. roboticvn

    Thread Starter Member

    Jul 9, 2014
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  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    light power?..
    maybe you mean lux/lumens/candlepower,etc...
    You can pick up a cheap multimeter with a lux/lumen sensor built right into it.
    or even a dedicated lux meter like this
    http://www.ebay.com/itm/like/161368853170?lpid=82

    or you can just read the datasheet for the LED.. the manufacturers have already done the testing for you..
     
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