This is my custom 10-key (8 MX, 2 encoder) mechanical macropad that has dual rotary encoders, per-key RGB lighting, and an OLED status screen. It is powered by the XIAO RP2040 and an MCP23008 I/O expander to make sure that I can do as much as I can on this board with such a small footprint.
Firmware made using KMK
*denotes a part not included in the hackpad kit. I will supply them.
| Part | Qty | Description | Remarks |
|---|---|---|---|
| MCU | 1 | Xiao RP2040 | |
| Expander | 1 | MCP23008 | * |
| Switches | 8 | MX-style CLEAR mechanical switches | |
| Keycaps | 8 | DSA or XDA Profile (1u) | |
| Display | 1 | 0.91" OLED 12C | Pinout GND-VCC-SDL-SDA |
| LEDs | 8 | SK6812 MINI-E | Reverse-mount |
| Resistors | 2 | 2.2kΩ or 4.7kΩ | * I2C Pull-ups |
| Diodes | 10 | 1N4148 | Through-hole |
| Hardware | 4 | M3 x 16mm Screws | Case |
| Hardware | 4 | M3 Heatset Inserts | 5mm x 4mm |