11mm is pretty big. The black-top one is almost certainly for IR, probably (although not guaranteed) to be the detector. The transparent one may be an IR emitter. Stick 'em in a breadboard and look at the current through them change as you turn on and off the lights. But…
Read the full replyHello,
Does anybody know what these things should be:
(the size is about 11mm in diameter/square side)
I guess these are some photo-diodes or such, but for what spectrum, of what sensitivity, primary application, ...?
Thank you.
-- Andy
The black-top one is almost certainly for IR, probably (although not guaranteed) to be the detector.
The transparent one may be an IR emitter.
Stick 'em in a breadboard and look at the current through them change as you turn on and off the lights. But remember that even the emitters work as detectors :-).
Tim.
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