inversetrig / 3x4

3x4

A small macropad in a 3x4 layout powered by KMK. If you are new to handwiring, worry not.

Required Parts

Part	Qty	Description
RP2040 Zero	1	Micro controller board
MX-style switches of your choosing	12	I used Outemu Lemon/Limes.
1N4148 Diodes	12	You need these for handwiring
M2 x 6mm hex female-to-female brass standoff (spacer)	2	This is what supports/holds down the plate and the case together
M2 x 6mm flat top screws	2	Plate-side that goes with the brass standoff
M2 x 6mm countersunk screws	3	Holdes the case and plate together. Also holds the MCU down.
M2 hex nut	1	Holds the MCU down

Firmware

I used KMK which runs on CircuitPython. If you are new here, you should take a look at the Getting Started section of KMK.

Changing the keymap

To change the keymap of the keyboard, press the most top-left key (default mapped to Q), and then connect it to the computer. There will be a USB shown in your Finder/File Explorer. Inside the USB, there's a code.py that can be modified. Here's all the keycodes supported by KMK. If you're looking for a more complex behavior (ie. combos, layers, hold-tap, mouse keys, etc), check out the modules section.

Note: Do not modify the boot.py as it would change the key required to have the USB show up in Finder/File Explorer.