Phil I have a few questions about your stepper driver boards.

Can you explain in brief the differences between the four driver boards on your site?

Allegro A3977, Allegro 5804, L297-298, and a discrete unipolar driver

What are the advatages of one over another, and how would someone choose which board suits one's needs?

Please excuse me if I'm missing something obvious, but I'm a newbie with electronics. :drowning: