RP2040-based 3×4 macropad with 12 Cherry MX-compatible switch sockets, 12 per-key NeoPixels, rotary encoder, 128×64 SH1106 OLED, 8 MB flash, buzzer, STEMMA QT, and USB-C HID/MIDI. Ships bare PCB; switches and keycaps sold separately.
Cherry-MX compatible key switch sockets in a 3x4 grid; each socket is individually tied to GPIO, not matrix-wired. Pressing a key grounds the pin, so use pull-ups.
Rotary encoder with push switch used as BOOT button and available as user input.
Qwiic-compatible STEMMA QT I2C connector for sensors and breakouts.
I2C clock on the STEMMA QT connector, usable as board.SCL / board.STEMMA_I2C().
I2C data on the STEMMA QT connector, usable as board.SDA / board.STEMMA_I2C().
USB Type-C connector for power and data/programming.
On-board OLED display driven from the RP2040 board circuitry.
3x4 grid of reverse-mount RGB NeoPixel LEDs above the key switch sockets, available as board.NEOPIXEL / PIN_NEOPIXEL.
On-board red LED available as board.LED / PIN_LED.
Reset button; tap once to reset, combine with boot button to enter bootloader.
On-board 8mm speaker/buzzer driven by board circuitry.
On-board 8MB QSPI flash used by CircuitPython as native read-only interpreter storage with writable disk drive exposed separately.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| KEY1-KEY12 | input | Cherry-MX compatible key switch sockets in a 3x4 grid; each socket is individually tied to GPIO, not matrix-wired. Pressing a key grounds the pin, so use pull-ups. | 3.3V RP2040 GPIO input domain. | |
| Rotary encoder / BOOT | input | Rotary encoder with push switch used as BOOT button and available as user input. | 3.3V RP2040 GPIO input domain. | |
| STEMMA QT | i2c-connector | Qwiic-compatible STEMMA QT I2C connector for sensors and breakouts. | 3.3V I2C; Adafruit states SCL and SDA have 10k pull-ups and are 3.3V when quiescent. | |
| SCL | i2c | I2C clock on the STEMMA QT connector, usable as board.SCL / board.STEMMA_I2C(). | 3.3V with 10k pull-up per Adafruit Learn. | |
| SDA | i2c | I2C data on the STEMMA QT connector, usable as board.SDA / board.STEMMA_I2C(). | 3.3V with 10k pull-up per Adafruit Learn. | |
| USB-C | power-data | USB Type-C connector for power and data/programming. | USB power input to board. | |
| OLED | display | On-board OLED display driven from the RP2040 board circuitry. | On-board display interface. | |
| NEOPIXEL | indicator | 3x4 grid of reverse-mount RGB NeoPixel LEDs above the key switch sockets, available as board.NEOPIXEL / PIN_NEOPIXEL. | On-board 3.3V controlled LEDs. | |
| Red LED | indicator | On-board red LED available as board.LED / PIN_LED. | On-board 3.3V controlled LED. | |
| Reset | control | Reset button; tap once to reset, combine with boot button to enter bootloader. | Board reset control. | |
| Speaker | audio | On-board 8mm speaker/buzzer driven by board circuitry. | On-board audio output. | |
| QSPI Flash | memory | On-board 8MB QSPI flash used by CircuitPython as native read-only interpreter storage with writable disk drive exposed separately. | On-board QSPI interface. |
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