A (much) better Pro Micro
The Bit-C is a pro-micro compatible microcontroller board featuring the Atmel ATmega32U4, designed for DIY keyboard enthusiasts. It features a sturdy through-hole USB-C connector that is more rugged than a standard USB micro B. It's only 1mm thick, so it sits slim and low. The Bit-C ships with the Atmel DFU bootloader, which is smaller and less finicky than the default Caterina bootloader. 100% of Bit-C units are exhaustively d before shipping, ensuring you're spending your time building, not debugging. Best of all, it comes in white!

100% Pro Micro compatible
The Bit-C is a drop-in replacement for any Pro Micro MCU, including the Elite-C. With 1-1 GPIO pin parity, firmware builds don't need to be changed in order to swap in a Bit-C. The Bit-C is shipped with the lightweight Atmel DFU bootloader, making flashing with QMK a breeze. VBUS detection & backdrive protection are implemented for split keyboards, and a 500mA resettable fuse is included for protection.

Tri-mode LED
The built in white LED shows power status by default, and can be set to 3 different brightnesses using GPIO controls. Don't like the built-in LED? Turn it off. Use it to show layer or caps lock status. Bright, dim, and off modes allow for maximum flexibility.

**NOTE: THE BIT-C SHIPS WITH THE ATMEL DFU BOOTLOADER BY DEFAULT. THIS BOOTLOADER IS NOT PROGRAMMABLE FROM THE ARDUINO IDE, AND WILL REQUIRE USING SPECIAL TOOLS, SUCH AS QMK TOOLBOX TO FLASH**

nullbits BIT-C Pro Micro MCU with USB-C & DFU bootloader (ATmega32U4, 5V/16MHz) (Black)

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Common Questions