One of my teachers did this in the 1980s with eproms. You could get a reasonable 1bpp silhouette out of a 2716 and a couple of lenses out of a broken pair of bi

One of my teachers did this in the 1980s with eproms. You could get a reasonable 1bpp silhouette out of a 2716 and a couple of lenses out of a broken pair of binoculars. You had to program it first then use the sun to erase the picture onto it which meant exposure times in the order of 20 mins on a sunny day to flip enough bits plus some figuring out of how the cells were organised. He had one wired to a BBC micro user port with a couple of shift registers and a BASIC program that copied the current state into video memory. I think this was around 1986 and was probably the coolest thing I'd ever seen at the time. Edit: just remembered - he worked out that if you used a high power camera flash and fired it 20-30 times it had the same effect.