Arduino-Based Stepper Motor Controller
Decided to drop my PCB and use some prebuilt modules from pololu. Doing the math, this turned out to be the cheapest option (3x$13 vs. $50 for the PCB plus another $30-$50 to populate). The pololu modules use Allegro’s A4983 intgrated h-bridge drivers rated at up to 2A – which amazes me given the size of the ICs. I’m a bit worried but I suspect that they’ve already been tested. I’m going to power it with a +/- 15V 3A supply I have, and use the g-code parser from the reprap project.