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Good job, I like the many cutaways to show exactly what's going on inside.

You may be interested in my simulation of Enigma (https://enigma.virtualcolossus.co.uk) which I wrote back in 2021 (pre-AI!). One of several I've done.

Try it on an Android phone to look around it in VR or on PC/Mac for easier use. You can even send messages to other users over the internet using the radio & Morse key.


Yours is amazing work, and certainly a higher degree of fidelity than I was able to achieve with AI assistance. The initial motivation behind this was largely driven by curiosity around the rotor motion (the ratchet and pawl assembly), and then into how the wiring actually works. For my brain, I needed to press the keys a hundred times and watch the current flow before it started making sense.

I'm curious about how you worked out the inner dimensions and part placements so accurately. Thank you for providing this marvelous free resource!


Virtual Hagelin M-209 is now live for D-Day’s 80th anniversary. A 3D simulation of the U.S cipher machine in use during World War 2.

No install necessary, just point your browser to https://m209.virtualcolossus.co.uk

Modelled from a CT scan of a real machine by Deutsches Museum, learn how to use it with in-built tutorials and have fun playing with a 1940s cipher machine in your browser!

Try it on Android to place an M-209 on your table at home! (sorry, Apple don't support this feature yet)


Thanks for posting about my Virtual Colossus simulation! Glad you enjoyed trying it out :)

Feedback noted from replies, thanks - I'll add a mute button today. For those confused about controls, there's another mode that might help: Choose the option "Restart in Touch Mode" in the menu top right which will give you a cursor pad and camera direction pad which may help. I'll see if I can add a movement help tutorial or something like that.

If you're interested in Colossus & Bletchley Park, I also have many other machines for you to try out. Virtual Colossus is one of my first attempts at 3D in a browser!

https://enigma.virtualcolossus.co.uk https://lorenz.virtualcolossus.co.uk https://bombe.virtualcolossus.co.uk

Plus, also have a fully working ICT 1301 2nd generation transistor computer simulated which you can find out more details about and try at TNMOC's website: https://www.tnmoc.org/virtual-flossie or on my website https://ict1301.virtualcolossus.co.uk/

Currently I'm working on a Hagelin M-209 cipher machine if you want to follow my work on Twitter/X: @VirtualColossus or Mastodon if you prefer: @[email protected]


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