DISCONTINUED ITEM-LTD QTY AVAILABLE Compact,PC driven step motor driver packaged in a DB-25 extended case. Unit plugs to computer parallel port. Supplied with DOS software (with source code) provided to get started. Drives 5, 6 or 8 unipolar step motors with currents up to 1A. External power source for motors depends on step motors you use and is not supplied. Step Motors not supplied.