Ever wondered how bright
is the infrared LED
on your remote control
? Just get a camcorder
, or webcam
and point it to the remote control
. Press any button
on the remote
and there it is! You can see the infrared light
coming out from it!
Most CCDs used in consumer cameras are sensitive to infrared. You'll also notice that most remotes emit pulses instead of a continuous light beam.
I wonder if it's possible to build an infrared flashlight strong enough to allow your camera to see in total darkness.