At the moment I’m building a semi-permament ugly board to put dc step-down, the ULN2003 drivers and the Arduino Nano into a more compact space and fewer loose wires hanging around. But this is sure a lot of work and error prone. It’s basically the same as an older Sangaboard version, but afaik you can’t get those easily, and even making them yourself requires getting a lot of different components.
Anyway, I also have a keyes_cnc board with A4988 drivers lying around. Those are also quite inexpensive, though more expensive than a self-built sangaboard, I guess. They would also require a software rewrite on the Arduino side to issue steps with the enable/direction/step stuff or using something like GRBL and then rewriting the host software to use GCode instead.
Any thoughts on this?