I've added an new compatable 1 axis design to the website. It's based on the ST L297 and Discrete MOSFET drivers. It adds a chopped high current/voltage design to the Open Source board list. Its pretty much a combination of the ST application note and the 10pin IDC filtered front end of the other open source boards. Has an onboard logic probe to aid in troubleshooting initial build problems.
http://pminmo.com/l297unipolar/l297unipolar.htm
As always if you see any problems with the design or have suggested improvements, I'm all ears.
If somebody would like to build one, but are afraid to commit till somebody else has, contact me and maybe we can work out some arrangement. I consider this a pretty low risk design. But there is always the opportunity for a goof up, wouldn't be my first or last.
And as always if somebody would like to help create a support document, parts list, etc contact me.
Thanks,
Phil