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Step 4Experimenting with different LEDs
The wikipedia article also states, "As a photodiode, it is sensitive to wavelengths equal to or shorter than the predominant wavelength it emits. For example, a green LED will be sensitive to blue light and to some green light, but not to yellow or red light"
Get a few different color LEDs and see how the color affects the voltage output.
My Results:
(see second image)
The voltage readings for ambient light were consistent with the wavelength property explained above. IR had the highest voltage and blue had the lowest.
The max reading I get seemed to do more with the type of LED rather than the color. The red, yellow, and green ultra bright LEDs put out the most voltage.
Dark was .001 or 0 for all of them.
As for current, my multimeter read .000 amps. I'm sure it puts out some, but nothing I can measure. If someone has some equipment that can get a reading I'd be interested to know what it is.
Get a few different color LEDs and see how the color affects the voltage output.
My Results:
(see second image)
The voltage readings for ambient light were consistent with the wavelength property explained above. IR had the highest voltage and blue had the lowest.
The max reading I get seemed to do more with the type of LED rather than the color. The red, yellow, and green ultra bright LEDs put out the most voltage.
Dark was .001 or 0 for all of them.
As for current, my multimeter read .000 amps. I'm sure it puts out some, but nothing I can measure. If someone has some equipment that can get a reading I'd be interested to know what it is.
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I wonder how many LEDs it would take collecting light to power 1 LED emitting light at full power.