Featherbyte uno v1.0.0

Featherbyte Uno

A RISC-V development board in the Arduino Uno footprint.

USB-C • Arduino-compatible headers • CAN • Open hardware

Hardware · References · Getting started · Manufacturing · Project status

Featherbyte Uno brings the WCH CH32V203 RISC-V microcontroller to the familiar Arduino Uno form factor. It is designed for projects that want the practical shield ecosystem, generous headers, modern USB-C connectivity, and a hardware CAN interface in one open, inspectable board design.

[!WARNING] This is an active hardware project, not yet a production-qualified board. Review the design files and validate the board for your use case before ordering or deploying hardware.

Capabilities

Hardware

The board preserves the recognizable Uno layout while exposing CH32V203 GPIO on the standard-style digital and analog header positions. The front side carries both USB-C connections, the MCU, boot/reset controls, CAN terminal, and the Arduino-compatible headers. The reverse side provides a clearly labelled SWD header and additional breakout access.

Key interfaces

Hardware validation

The images above show an assembled Featherbyte Uno prototype on the bench.

[!CAUTION] These photographs show an early board revision. The current KiCad project includes silkscreen corrections and additions that are not reflected on this prototype. Treat the checked-in design files as the source of truth for the current revision.

Blink test on real hardware

A blink test running on the assembled prototype. This demonstrates basic firmware execution on real hardware; it does not constitute full board validation.

Repository map

.
├── hardware/
│   └── featherbyte-uno-v1.0.0/
│       ├── featherbyte-uno-v1.0.0.kicad_pro  # KiCad project
│       ├── featherbyte-uno-v1.0.0.kicad_sch  # schematic
│       ├── featherbyte-uno-v1.0.0.kicad_pcb  # PCB layout
│       ├── Gerber/                           # fabrication outputs
│       ├── 3d/                               # component STEP models
│       ├── footprints/                       # custom footprints
│       └── sym/                              # project symbol libraries
├── docs/                                     # schematic and component references
└── images/                                   # board renders used here

Reference documents

The documents below are checked into the repository for offline design review and bring-up.

Getting started

Explore or modify the board

1. Install KiCad.
2. Clone this repository.
3. Open hardware/featherbyte-uno-v1.0.0/featherbyte-uno-v1.0.0.kicad_pro in KiCad.
4. Use the schematic and PCB editors to inspect the design; the project-local symbol, footprint, and 3D-model assets are included.

Program and debug

The board exposes an SWD header labelled SWDIO, SWCLK, NRST, 3.3V, and GND. Connect a compatible 3.3 V SWD debugger to this header. Firmware, toolchain, bootloader, and flashing instructions are not yet included in this repository—please treat bring-up as development work until those are published.

Manufacturing

Ready-to-export fabrication files are in hardware/featherbyte-uno-v1.0.0/Gerber. Before submitting an order:

1. Check the Gerbers and drill files in your fabricator’s viewer.
2. Confirm stack-up, finish, thickness, and assembly constraints against your requirements.
3. Independently verify the schematic, PCB revision, and component availability.
4. Bring up and test a small batch before any larger build.

The included hardware project identifies the current schematic revision as v1.2.0. The directory name is retained as featherbyte-uno-v1.0.0 to match the checked-in project and fabrication paths.

Project status

Contributing

Design review, testing notes, issues, and pull requests are welcome. For hardware changes, please include the relevant KiCad source changes and describe any electrical, mechanical, or manufacturing impact.

License

MIT License