Silly uses for stepper motors

Bob Armstrong bob at
Fri Jun 13 08:47:46 CDT 2008

On Jim Leonard wrote:
> It's a video of a floppy disk drive playing music by screwing with the
> stepper motor.  ...  Or is a hardware hack required to generate the
> right frequencies?

  It's not a floppy, but there's an Easter Egg in the HP Scanjet 5P firmware
that allows it to play Beethoven with the stepper motor that moves the head
carriage.  It wins my vote for the coolest musical Easter Egg in a consumer


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