8 layers
Programming
bitfixer/bf-romulator
Romulator - RAM/ROM replacement and debug for 6502 CPU systems
2 parts160
8 layers
RoyalBlue54L Feather
buildwithtrace/trace-public57Official source code of Trace, an AI-native PCB design tool.
- Copper layers
- 8
- Thickness
- 1.6 mm
- Parts
- 2
- Nets
- 95
- Pads
- 2
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 30 Jan 2026
- Updated
- 11 May 2026
Overview
RoyalBlue54L Feather is an open-source printed circuit board by buildwithtrace, from the buildwithtrace/trace-public repository on GitHub, published under the GPL-3.0 licence. It is an 8-layer board with 2 parts on 95 nets.
It belongs with the microcontroller boards boards of this library.
README
demos/royalblue54L_feather/README.mdRoyalBlue54L Feather
An ARM + RISC-V Feather board with the new nRF54L15, built-in debugger, and smart PMIC
Overview
The RoyalBlue54L--familiar Feather formfactor with distinctive features. Nordic's next-gen nRF54L15, an onboard CMSIS-DAP debugger + UART bridge, and smart power-management features from the nPM1300 enable rapid development for your next Bluetooth 6.0, Thread, Matter, Zigbee, Amazon Sidewalk, or proprietary wireless project.
Crowd Supply project link: https://www.crowdsupply.com/lords-boards/royalblue54l-feather
Hardware Features
- Dual-core processing power:
- ARM Cortex-M33 at 128MHz
- RISC-V co-processor at 128MHz
- Comprehensive memory configuration:
- 1.5MB of non-volatile memory (NVM)
- 256KB of RAM
- 2MB external flash
- Advanced wireless capabilities:
- BLE 6.0 support with channel sounding for distance estimation
- 4Mbps PHY for proprietary wireless protocols
- 30-50% power reduction compared to nRF52 series
- Integrated development tools:
- CMSIS-DAP debugger (nRF52833-based)
- USB-to-UART bridge
- Open source, Zephyr RTOS-based firmware
- Smart power management:
- USB-C charging up to 800mA with nPM1300
- High-accuracy battery fuel gauge
- Connectivity:
- JST-PH connector
- STEMMA-QT/Qwiic port
- NFC antenna connector
- User interfaces:
- User LED
- RGB LED (nPM1300-driven)
- User button
- Reset button
Project Contents
This project contains the hardware design files for the RoyalBlue54L Feather. The board is designed with KiCAD and includes:
- Schematic files
- PCB layout
- Bill of Materials (BOM)
- Documentation
Related Repositories
License
Hardware files are released under CERN-OHL-V2-P.
Modification Note
Modified by KiCad Project Feb 17, 2025
- Removed Manufacturing files
- Update README.md
Parts
2| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | 100nF | Capacitor_SMD:C_0402_1005Metric | C25 |
| 1 | MountingHole | MountingHole:MountingHole_2.5mm | H4 |
Questions
What parts does the RoyalBlue54L Feather use?
2 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the RoyalBlue54L Feather KiCad files?
From the buildwithtrace/trace-public repository on GitHub, at the commit this page was made from: the board is demos/royalblue54L_feather/RoyalBlue54L-Feather.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the RoyalBlue54L Feather design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 8 layers65 × 30 mm
- 8 layers31 × 21 mm
