A PC Stepper Motor Controller, using the stepper motor from a 5 1/4" Floppy Disk Drive.

These Drives can usually be picked up for $1 each, other parts $6 from DSE

DSE  CAT No. 1 x P2690, 4 x Z1308, 4 x Z1340, 4 x R1074

The software simply moves the stepper motor anti-clockwise then clock-wise. The speed and angle are adjustable.

Parrallel Port Connecton to the Stepper Motor

Note: Connect GND to Pin 18-25 on LPT Port