byrandev (V1.0)
I am happy to announce that the next revision of the byrandev will be coming to an OSHW GitHub repository near you! :)
a nrf52840 dev board that is highly experimental.
The components are based off the mikoto board.
I will do some finishing touches when I have the time.
Since the board is two layered, it can be made affordably and be directly integrated into larger boards with no issue.
V2 come soon with a ton of new features:
- SMA Antenna Connector
- More Pins
- JST-PH connector for power
- and a lot more!
There are currently no instructions, I will write them sometime in the future :)
Notes for anyone that is considering using the design:
- Optimize the impdedance matching traces for your particular board stackup (if you are using JLC 2 layer, you should be fine)
- It is expensive. Under current silicon shortage conditions, 2 assembled boards costed 100, and 5 would've costed 150. Self assembly should be cheaper but difficult due to the aQFN73 footprint of the nRF52840.
- It's large. Being two layered, I couldn't fit traces very well. I will reconsider my routing decisions on V2 and hopefully achieve a much smaller footprint.
PCB (28 GPIO pins)
PCB 3D File Raytraced Render in KiCAD
Real Images (working prototype from JLCPCB, HASL(PBF) 2 Layer, Black Solder Mask)
Unsightly Image with more detail on the PCB
As with most open source projects, I am not liable for any issues, and no warranty is provided. Please use at your own risk and make this world a better place :)