I bought one of these lovely nixie clocks from Ukraine, where they still have a vast stockpile of former Soviet tubes. I've loved them since I was a kid, and this Arduino-driven clock is just gorgeous.

The box here is my art deco style retro interpretation of a nice case for it. It looks great printed in wood filament.

The rear of the unit needs some work if I can get the time - I want to close off the wide opening and add buttons to click through to the board, as well as mount a proper PSU socket. But for a Mk 1, I'm pretty happy with it.

The case just fits on the 250mm bed of the Mk3. It should go without saying that it's sized for the shield and Arduino, and can't be scaled!

The holes are sized for 2.5mm screws.

Link: https://gra-afch.com/catalog/diy-kit-for-nixie-tubes-clocks/diy-kit-for-nixie-tubes-clocks-in-14/

NB: THE UNIT GENERATES HIGH VOLTAGE TO POWER THE NIXIES!

DON’T POKE AT THE BUTTONS WITH YOUR FINGERS!