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LEDs as light sensors

Step 3Sensing

All you have to do is hook up the multimeter to read the voltage coming off the LED, that's it! Try pointing the LED at different light sources and see how the reading changes.

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2 comments

Nov 27, 2011. 5:14 AM

Electorials says:

Oh 1.381V, that's a lot!
I knew they could be used as light sensors, but I didn't know they could produce a voltage that high.

Can you light another LED with the generated voltage from the first LED?
haha

and also, I thought your name was Zornik, a Belgian band, but it's Zorink :D
Do you know Zornik?

Nov 27, 2011. 1:23 PM

Zorink (author) says:

I have not been able to light up another LED, but I'm sure you could if you string enough together. The voltage is great for an analog input pin on an IC, but the current isn't enough to drive an LED.

I am unfamiliar with the band, I'll have to look them up!