I picked up some IN-12B nixie tubes on ebay ages ago for no particular reason other than they’re pretty awesome! I had no way to run them as they require ~150 volts DC.

I came across the ArduiNIX shield, which has a built in boost circuit and dual output drivers allowing multiplexed control of 80 seperate elements which is enough for 8 tubes using the 0-9 elements or 7 tubes if using the decimal point.