while i was browsing my attic, i came across a bunch of external scsi drives, picking them up to trow them away, when a thought struck me. hey! 5volt, 12 volt, cooling, a lot of inputs/outputs, a settable binary counter. perfect for a arduino project.
drive some steppers? wire the thing up with the drivers in the case and route them trough the old centronics 50 pin to a db 25 cable used on old macs and you have your shielded break out! wire the motors on a female db25 an off you go.
now to find a standard way for the pinout...
even the led on the front can have a purpous here!