“This is a Nixie clock 3D wired in a glass dome. It is made with IN-12A (ИН-12A) Nixie tubes and an Arduino nano.
This is inspired from a kit I bought a few years ago. I made some modifications to use an Arduino, a DS3231 clock and a DC buck converter module. I also wrote my own program with Arduino IDE.
You will need to be very patient to complete this project. You must be very carefull due to hazardous voltage inside (170 V). And of course you must have a good experience in soldering and understanding electronic schematics.”