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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.