For the past seven years, I've had a broken digital camera lying around. It is still able to take pictures, but it is almost impossible to use on account of a broken screen. The fundamental problem is that sometimes the menu will accidentally get turned on, and not being able to see the screen, I can't turn off the menu and take pictures (without removing the batteries to reset the camera). I've been trying to figure out what to do with this camera as long as I can remember.
For a while I was considering converting it to a near IR camera, but I was reluctant to make another one after having already made one for 62 Projects to Make with a Dead Computer
(p. 200). However, I changed my mind about this when I learned that it was possible to use the material inside floppy disks as a visible light filter (for viewing near IR light). This sounded really cool and so I decided to give this a try. Not only does this totally work, it also adds another level of computer reuse to the version demonstrated in the book (as it provides a way to reuse floppy disks in addition to cameras).
It has been fun going around shooting pictures and discovering all of the interesting results when I upload the photos at home.