"Dan Halbert" bravely wrote to "All" (31 Dec 05 20:34:08)
--- on the heady topic of " Identifying a mystery diode"

DH From: Dan Halbert
DH Xref: core-easynews rec.radio.amateur.homebrew:90419

DH You could apply power it to as you would an LED (using a
DH current-limiting resistor), and take a look at it in a digital
DH camera's display. Digital cameras are somewhat sensitive to IR, even
DH though they usually have a built-in IR cut filter. Try it with an IR
DH remote control to see what I mean.

DH Dan, KB1RT

IR LED makes quite sensitive IR receiver. Just power up the mystery
diode near it and measure the voltage across the leads using a DMM.

A*s*i*m*o*v

.... Curiousity didn't kill the cat, I got him with the mower!