Tuesday, September 27, 2011

Little Black LED what are you?

What kind of LED is this, doesn't seem to be an Infrared LED
I got a grab bag of LED's from Jamco electronics and I got quite a few of these little LED's that look like they are black or some very dark color at the end.  Using a lithium button battery I didn't see them light up at all.  So I got out my camera and tried it again while looking at the image preview and didn't see it light up.  I have used the camera trick before to identify infrared LED's in the past so I know the camera can pick up IR.

So to all my fellow geeks online WTF is this LED?


  1. Its probably an IR reciever...

  2. I'm pretty sure I can figure out a way to test that with the arduino. Thanks for the idea, I'll try it (hopefully this week).