Wishing to experiment a little with some surplus unmarked stepper motors I've recently obtained an L298 Arduino module similar to http://www.ebay.co.uk/itm/L298N-Dual...item2a124b6f46 and http://www.ebay.co.uk/itm/3209276783...84.m1497.l2649
The plan is to use this driven by its usual partner, an L297.
Inspecting the variant of the PCB I have I'm a little surprised to find pins 1 and 15 taken straight to ground thus leaving no ability to provide a "Sense" drive to the L297 and thus, presumably, completely loosing the ability to control the chopper circuit via the Enable pins.
Other than the obvious of changing the module or snipping and lifting of pins 1 and 15 from ground (which, fortunately. is just possible) and installing a pair of "Sense" resistors, has anyone got another suggestion for controlling the current in low ohm stepper motor windings.