QMK Proton C

Regular price $15.99 Sale

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Looking for a Pro Micro replacement for keyboard builds? Developed by the QMK collaborators, the Proton C allows you to upgrade any Pro Micro compatible keyboard kit to take advantage of a robust USB Type-C port, a faster ARM chipset, and an optional speaker. Extra pins are available on the lower half of the Proton C, which can be broken off for builds that aren't compatible.

Includes a 5V step-up output for WS2812 LED strips (rest of board is 3.3V), and a reset button to put the MCU into the bootloader mode.

Add a piezo speaker/buzzer for even more fun!

NOTE: QMK support for split keyboards is not available yet, and development is still in progress. This is currently a firmware issue and will be fixed, although there is no ETA on that yet. 

This notice will be kept up to date, so if you don't see a change here, it's not ready yet.

The Proton C is compatible with this speaker: Piezo Speaker

Note: Header pins are not included with the Proton C


  • Through-hole mounted USB-C Port
  • 32-bit 72Mhz Cortex-M4 processor (STM32F303CCT6)
  • 23x 3.3V I/O Ports
  • 1x 5V output for WS2812 LED chains
  • 256KB Flash
  • 40KB RAM
  • AST1109MLTRQ speaker footprint