Uses for scrap floppy disk drives.?

I have a stack of old fdds - they have small motors and worm gears to drive the head and some have motors for the disk but the others have the disk motor coils affixed to the circuit board and so it is difficult to salvage that. Is it possible to 'drive' the fdd over the connector? What signals normally traverse the ribbon cable? They all have opto sensors for the disk in or out and an led of course.