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May be useful bits and pieces for hackers...
My favourite has to be this idea...
One potentially for Hugh... https://www.tindie.com/products/Mixtile/mixtile-gena/ ?
Interesting site. thanks. I wondered if they have a calculator keyboard; something like a 4 banger layout with a few extra blank keys for the arduino or rPI. Would make an interesting calculator project.
I'm not particularly impressed with his Enigma reproduction. It's really just a screen in a box and those Arduino LCDs are mostly quite poor.
A better solution, along the same lines, would be to make a wooden case that holds a mobile phone. Then simply run a mobile app. Mobile screen are much better and the touch works better.
Interesting device. The links to documentation do not work. It would only be useful if you could program the device directly.