What photo sensor is this?

G

gregmcc

Member

• Sep 10, 2012

• #1

I dug up a photo sensor of some kind that when you shine a light in it, it generates a voltage. Around 300mV with a strong light.

What is this component called? Its not a LDR. Photo diode, photo sensor?

I want to connect it up to a op amp to amplify the voltage so I can detect small changes in light.

 

MikeMl

Well-Known Member

Most Helpful Member

• Sep 10, 2012

• #2

It could just be an LED. Standard Red Leds produce ~1.2V in bright sunlight.

 

G

gregmcc

Member

• Sep 10, 2012

• #3

THanks. Very interesting. May'be I'll apply a current limited voltage to it and see what happens.

 

K

kidneutrino

New Member

• Nov 30, 2012

• #4

what was the verdict? Did it light? I guess it could be IR so you would need to use your digital camera to 'see' the light...

 

G

gregmcc

Member

• Jan 5, 2013

• #5

It didnt light, but I did see the light on a camera. So I guess it was a IR LED.