A small macropad in a 3x4 layout powered by KMK. If you are new to handwiring, worry not.
| 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 |
I used KMK which runs on CircuitPython. If you are new here, you should take a look at the Getting Started section of KMK.
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.