An anonymous reader writes: I completed a months long project to build my own version of the Turing-Welchman Bombe. My machine uses a Raspberry Pi2 and an Arduino to drive stepper motors to turn the three output indicator drums and to drive an LCD display, to work like the indicator unit on the real Bombe. Everything was custom made by me at home. The unit is built to reflect the style of the real Bombe at Bletchley Park and to run in a similar way but as a portable, desktop sized unit. To demonstrate it I use the same Weather Report Menu as used at BP to demonstrate their real Bombe. The entire build was painstakingly documented over many months but the link given shows an overview and a film of the completed machine in action.
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