Has any one considered using

Driver25PS is a new improved 2.5A Bipolar stepper motor drive board.

Specification

* Popular design using the Allegro 3977 chip
* PS (Power save input) is switchable and reduces hold current to approx 30% keeping chips, motors and power supplies cool. This function is optional and needs a compatible parallel interface to work.
* Unplugable none reversible motor connector
* Improved layout, with all connections on one side and provision for vertical mounting bracket.
* Two phase PWM operation.
* Uses Internal synchronous rectification to reduce board size and heat dissipation.
* Includes thermal shutdown, UVLO and crossover current protection.
* 1/8,1/4,1/2 or full step selectable.
* Dip switch adjustable stepper currents 1, 1.5, 2 & 2.5 amps
* Step, Direction, Enable and PS (Power save) line inputs.
* On board 5V regulator, single supply line (24V - 30V DC regulated supply recommended)
* Maximum 35V @ 2.5A per phase motor output.
* LED indicator display of step, direction, enable and power.
* Dip switch settings for step increment, enable, sleep & current.
* Board size 97 X 60 mm. FR4, immersion gold, 2oz copper, RoHS compliant.
* Loop through power connections.




£18 kit (SMD chip already soldered) or £23 built/tested, He's based in stoke!

From http://www.diycnc.co.uk