Developer notaroomba creates Keybytes, a modular keyboard system with individual key microcontrollers

Modular Keyboard Design

Developer notaroomba, also known as Nathan Alspaugh, introduced Keybytes, a modular keyboard project detailed on GitHub. The system consists of a central Keyword hub that connects magnetically to individual Keybit keys. Each Keybit contains its own microcontroller, allowing for user-defined key layouts and selections.

Core Components

The Keyword hub features a stacked PCB design, housing an Arm Cortex M4-powered microcontroller, a Bluetooth antenna, and flash memory on the top board. The lower board provides USB-C connectivity, charging capabilities, and a buck-boost converter. Each Keybit, a 1U-sized module, integrates a CH32V003 RISC-V microcontroller and uses pogo pins on all four sides for power and I2C communication. Keybits also feature magnetic cases for attachment and support Cherry MX switches.

Open-Source Development

Alspaugh, an MIT student, has made all project assets, files, and details available on GitHub under the permissive MIT license. The project began in March, with the developer recently confirming its functionality. While current examples show only a few Keybits connected, the design allows for extensive customization.

Potential Costs and Complexity

Building a full-sized keyboard with Keybytes could be expensive and complex for individuals. The process involves manufacturing PCBs, purchasing and soldering components, and 3D printing custom parts. Alspaugh noted that a full-sized keyboard with two Keywords and approximately 110 Keybits would incur significant costs.