Making a floppy organ. I know it's bindun etc. but I still think they're pretty cool.
Got a bunch of drives from my brothers work and just started working how to play with them.
So far got the stepping and direction sussed, so that's nice as that's basically all I need. Just need to get my head around interrupts to drive multiple drives at once.
Also, it's not being driven by an Arduino: it's using an mbed which is a cool little arm based Dev board.
It lives!:
http://youtu.be/PoT8VbaLp4g
Incidentally, the lecturer, who let's me use the lab space for silly projects, his first proper job after graduating was to design a floppy disc controller IC at Siemens (for Western Digital, strangely enough). He was dead excited at seeing my stack of floppy drives (yes, john) but then seemed a bit disappointed that none of them had his chip in them.