I got some more......

Remote operated volume control on stero..

Opening and closing furnace vent in house..

Opening and closing a pet door when 8051
detects pet with proper collar..

Raising and lowering a blind..

Locking and unlocking a time control on
a gate..

As you an see,,,,any action that requires
movement can be setup to have a stepper motor
do the movement. The challenge is coming
up with an appropriately sized motor and
working out the mechanical linkages.

Have Fun
Mike Karas