Macropad STM32F4x1

**I've moved over to [printables.com](https://www.printables.com/@kaibs_2797709) for publishing my designs. Please consider downloading this design there: [printables.com | Macropad STM32F4x1](https://www.printables.com/model/1182999-macropad-stm32f4x1)**

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This is a remix of the handwired macropad [VOID9](https://www.thingiverse.com/thing:4222157) by [Victor](https://victorlucachi.ro/).
Instead of the Arduino ProMicro this version fits a STM32F4x1 (aka "Black Pill").

I provide only the redesigned bottom part, please visit the [original thing](https://www.thingiverse.com/thing:4222157) for the top pieces.
If you want to use an encoder, have a look at the [switchplate adapter](https://www.thingiverse.com/thing:3770166) I'm using.

### assembly:

The STM32 can be (hot)glued into the bottom, although it holds pretty good on it's own.
Top and bottom part also hold together solely by friction, but there are holes for screws (2x
M3x18mm in the front, 2x M3x28mm in the back).

### softw