Kaltstahl Storage Device

€59.95

Out of stock

SKU: LD-KALTSTAHL Categories: , , ,

Description

The Kaltstahl USB dongle is a higher-capacity version of Blaustahl that provides long-term storage for about 128 pages 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.

Kaltstahl also has improved ESD protection and a potentially increased operational lifetime due to storage of firmware in EEPROM instead of Flash. It comes with a slightly larger and more durable translucent case.

Kaltstahl uses the Blaustahl firmware.

Note: The available stock is a limited edition prototype for early adopters that was hand assembled in Germany. The board and case may have visual imperfections, but have been tested for functionality. We may produce a lower cost version in the future.

Features

  • 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) EEPROM for firmware storage
    • Data retention: 100+ years
  • 256KB (2Mbit) Ferroelectric RAM
    • Data retention: 95 years @ +55C, over 200 years @ +35C
    • Endurance: 10^12 read/write cycles @ +85C
  • LED
  • Supports FRAM write protection via solder jumper
  • Improved ESD protection
  • Includes 3D-printed translucent PLA plastic case (color/appearance may differ from photo)
  • Board dimensions: 30mm x 16mm

Use Cases

  • Password storage
  • Cryptocurrency private key storage
  • Note/list storage
  • Geocaching
  • Time capsules
  • Data logging
  • FRAM development board

Usage (Linux)

$ screen /dev/ttyACM0

Editor Commands

CTRL-G   Help
CTRL-L   Refresh screen
CTRL-W   Toggle write mode
CTRL-S   Toggle status bar
CTRL-Y   Enter firmware update mode
PGUP/DN  Navigate between pages
$        Move to end of line
^        Move to beginning of line

Resources

  • Schematics, firmware, documentation and a 3D-printable case are available on GitHub

Future data recovery

In the event that the USB interface were to become obsolete or the RP2040 were to become non-functional, it should still be possible to recover the FRAM data using a SOP-8 test clip.

Origin

  • Designed in Germany
  • PCB manufactured and assembled in Germany
  • PLA enclosure manufactured and assembled in Germany
  • Tested, packaged and shipped from Germany

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