Description
Grünstahl is a tiny USB-C dongle for long-term storage of 2048 bytes. It uses USB HID to communicate with a host computer/phone using custom software for data transfer.
Also see Blaustahl and Kaltstahl for more storage and features.
Coming soon.
Features
- USB-C plug with USB HID interface
- Open-source software for data access
- 2KB (16Kbit) Ferroelectric RAM
- Lifespan: 95 years @ +55C, over 200 years @ +35C
- Endurance: 10^12 read/write cycles @ +85C
- CH32V003 RISC-V MCU @ 48MHz
- Green LED
- Supports FRAM write protection via solder jumper
- Supports data recovery via pads on reverse side
- Includes 3D-printed PLA plastic case (color/appearance may differ from photo)
- Board dimensions: ~16mm x ~16mm x 0.8mm
Use Cases
- Password storage
- Cryptocurrency private key storage
- Note/list storage
- Geocaching
- Time capsules
- FRAM development board
Resources
- Schematics, firmware, documentation and 3D-printable case will be made available on GitHub
Origin
- Designed in Germany
- PCB manufactured and assembled in China
- PLA enclosure manufactured and assembled in Germany
- Tested, packaged and shipped from Germany
