Arduino Based Paper Circle Cutter Machine

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Here's a PCB design that has two A4988 stepper driver modules controlled by an Arduino Pro Micro, PCF8574 GPIO expanders, and an OLED display with a rotary encoder based menu.

I want to use this as a fast prototyping platform for stepper motor projects, but I had one project in mind to get started.

In trying to figure out a way to cut consistent circles out of a larger sticker material, I decided to put two stepper motors to work, using a knife and a rotating platform to do the task a lot better than I can achieve manually.

It may not be perfect, but it works and is a good learning experience.

Sketch & Schematic:
https://github.com/GadgetReboot/GR_StepperIO

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