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LED sensing - LED as photodiode

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Uploaded by on Oct 1, 2008

using a led as a photo diode. The LED I'm using is a bright white led. in normal environment the led produces about 40mV. In darkness (light blocked by my hand) almost none. With a light source 100mV.

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Science & Technology

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  • Voltmeter resistance about 1MOhm? Photo-current about 40mV/1Mohm = 40 nA?

  • please edit and watch you video before publishing. I have wasted my time.

  • When you use an LED as a photodiode, does it actually produce a small voltage, or does it simply decrease in resistance?

    I have never known this, and would appreciate any help! Thanks

  • mooie muziek ^^

  • that is a great thing. I am gonna try using it in my projects and see if it can be used in place of the real photodiode.

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