So I decided to try designing a 3-axis Grbl controller based on an Arduino Nano, if for no other reason than to see if I could do it. I’m relatively familiar with electronics, but lack the formal theory education. Mostly self taught, I can follow design guidelines and can cobble together a design, based on other widely available boards, which is what I’ve done here. I just figured I would post this up here, and see if some folks more learned then me could give me any pointers, or at least let me know of any glaring issues with the design before I send my $10 and wait 2 weeks for prototypes. I appreciate any help!
Here is a link to the Gerber zip file.
EDIT: Updated link, found I forgot the logic GND track on the X driver.