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The Nullbits Bit-C is a high-quality microcontroller daughterboard designed for DIY keyboard enthusiasts, featuring an Atmel ATmega32U4 chip and a sturdy through-hole USB-C connector. With its slim profile and extensive compatibility, the Bit-C ensures you can focus on building your perfect keyboard rather than debugging issues.
The Bit-C features a rugged through-hole USB-C connector, offering a more durable and reliable connection compared to standard USB micro B connectors.
Measuring only 1mm thick, the Bit-C boasts a slim and low-profile design, ensuring a sleek appearance for your keyboard.
Every Bit-C unit undergoes exhaustive testing before shipping to ensure a hassle-free building experience and optimal performance.
The Bit-C comes with the Atmel DFU bootloader, offering a smaller and less finicky solution than the default Caterina bootloader.
The Bit-C is fully compatible with any Pro Micro MCU, including the Elite-C, making it a seamless drop-in replacement with 1-1 GPIO pin parity.
Easy Firmware Integration
Thanks to its compatibility with the lightweight Atmel DFU bootloader, flashing firmware with QMK is a breeze.
Split Keyboard Support and Protection
The Bit-C features VBUS detection, backdrive protection for split keyboards, and a 500mA resettable fuse for added safety.
The built-in white LED displays power status by default and can be set to three different brightness levels using GPIO controls. Use it to show layer or caps lock status or turn it off altogether for maximum flexibility.
The Bit-C MCU package includes the following:
The Bit-C is compatible with all major versions of Windows, MacOS, and Linux, and works seamlessly with USB 2, USB 3, and USB-C connections. Driver installation may be required for Windows 7/8/10/11, but no installation is needed for MacOS and Linux. See here for info.