"Lloyd E. Sponenburgh" wrote:

Old floppy drive? Old hard disk(?), Old tape drives, old
laser/dotmatrix/inkjet printer.

How 'bout the galvo' stepper from a CD player? 'tis tiny in most.

Usually if it has six wires, then it is most probably a stepper motor.

Floppy drive ones are interesting because most have a grooved shaft,
which might save the hacker trying to set up belts and cogs.

The most interesting was a linear drive I one found in an IBM floppy.