Nixie clocks use Nixie tubes for the time/date display and, if you’re into quirky retro stuff, are an attractive alternative to your everyday clock.
I’ve built a couple (you can also find them ready-made), here’s one of them:
I sourced all the components, including the tubes, from PV Electronics. The particular kit shown above is no longer available with IN-8-2 tubes but a number of alternatives can be found here.
Nixie tubes haven’t been made for over 30 years so supplies are gradually dwindling and consequently prices are increasing. However there’s a very talented guy called Dalibor Farny in the Czech Republic who has created his own tube production facility. His nixie tubes are things of beauty and what he has achieved since 2011 is extraordinary – read more here.