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minigma's Introduction

What

Minigma will be a small replica of a 3-wheel enigma. While my idea is to build is as accurate as possible, I'm very pragmatic and not planning to become obsessed by details.

Model

I will try to model the M4 version for variuous reasons. A lot of info can be found here:

https://www.cryptomuseum.com/crypto/enigma/m4/index.htm

alot of info here: http://enigmamuseum.com/em.htm#introx

Original

Parts

Keyboard (input)

Lamps (output)

  • Could potentially make the minigma significant easier by using 16-segment
  • display is stead of the normal 26 lamps (for each letter 1) Cool: Nixie with
  • lamps: small condensator to 'fade in fade out' effect

letter dails

  • oled display?
  • 3 16-segment displays + 6 push buttons?
  • Rotary Switch Sections Wafers NOS 1P26T 1 Pole 26 positions Lot of 3 ?

switch board

  • could be simple switches that come before the lamps
  • would consider this optional.
  • Worst case: could be done in software

power supply

M4 could be switched between batttery ('hell' and 'dnk', dark). off and 'sammler 4v' In this mode it operated on external power supply of 4 v

crypto engine

  • ESP32 / ESP 8266 with IO/extenders over i2c
  • in LUA, nodeMCU

IO requirements

  • 26 letters input (matrix, so probably 6+6 ? )
  • 26 letter outputs (again, 6 +6 )
  • 2 * 3 button for 3 wheels up/down

= 30 IO ports = 4x8

general

Maybe it makes sense to make 4 diffent boards: A keyboard, a letterboard, rotary switches, and plug board

images:

minigma's People

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