Blaustahl Storage Device

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The Blaustahl USB dongle provides long-term storage for about 8000 characters of text. Simply plug the device into your computer and open any serial communications program that supports VT100 emulation (PuTTY, Tera Term, Minicom, screen, etc.) in order to access the built-in text editor.

See also: Stahl Storage Device

Currently available for reservation. Final appearance, specifications, pricing and features subject to change.


  • USB-CDC interface requires no additional drivers on most OSes
  • Built-in text editor
  • RP2040 MCU 32-bit MCU (Dual Cortex M0+, 264KB SRAM)
  • 4MB (32Mbit) NOR Flash
  • 8KB Ferroelectric RAM
    • Lifespan: 95 years @ +55C, over 200 years @ +35C
    • Endurance: 10^12 read/write cycles @ +85C
  • Blue LED
  • Supports write protection via solder jumper
  • Board dimensions: 30mm x 16mm

Use Cases

  • Password storage
  • Cryptocurrency private key storage
  • Note/list storage
  • Geocaching
  • Time capsules

Usage (Linux)

$ screen /dev/ttyACM0

Editor Commands

CTRL-G   Help
CTRL-L   Refresh screen
CTRL-W   Toggle write mode


  • Schematics, firmware and 3D-printable case will be made available on GitHub