Adafruit KB2040 - RP2040 Kee Boar Driver
We have ✅ 7 available of the AF-5302 in our Sydney warehouse. An extra 100 units available with a short lead time.
The Adafruit KB2040 is an RP2040-powered board designed specifically for mechanical keyboard builds, in the Arduino Pro Micro form factor. With castellated pads, USB-C, 8 MB of Flash, and a STEMMA QT / Qwiic connector, it's a drop-in replacement for Pro Micro boards with significantly more power and storage.
Featuring 20 GPIO pins (18 on castellated pads plus 2 on the STEMMA QT port), the KB2040 easily supports up to 100-key matrices or common 65% 5×15 keyboard layouts. It runs CircuitPython, MicroPython, or C/C++ via the Pico SDK, with a built-in UF2 bootloader for drag-and-drop firmware flashing.
Key Features
- Pro Micro Form Factor – 1.3" × 0.7" with near-identical pinout; castellated pads for direct soldering
- RP2040 Dual-Core Cortex M0+ – 125 MHz, 264 KB RAM
- 8 MB SPI Flash – Generous storage for CircuitPython, KMK, or custom firmware
- USB-C Connector – Modern connection with built-in ROM UF2 bootloader
- 20 GPIO Pins – 18 on pads + 2 via STEMMA QT; 4× ADC, 16× PWM, 2× I2C, 2× SPI, 2× UART
- STEMMA QT / Qwiic Connector – End-mounted I2C port for plug-and-play accessories or extra GPIO
- D+ and D− Breakouts – Extra USB data pins for alternative connection options
- RAW Power Output – 5V output for NeoPixels; jumper to bypass 500 mA fuse for up to 2A
- RGB NeoPixel – Onboard addressable LED for status indication
- Reset & Boot Buttons – Boot button doubles as user input GPIO
Ideal For
- Custom mechanical keyboard builds (up to 100-key matrices)
- Drop-in Pro Micro replacement with RP2040 power
- CircuitPython and KMK keyboard firmware projects
- Compact RP2040 projects needing castellated pads and USB-C
Package Contents
- 1× Adafruit KB2040 (RP2040 Kee Boar Driver)
Resources
The Adafruit KB2040 - RP2040 Kee Boar Driver appears in the following collections:
