Old-fashioned Nixie tubes are beautiful, but driving them in a circuit can be complicated since they often require voltages as high as 250V DC. The ArduiNIX board for Arduino makes it easy to add standard clock functions to your next project. Just be sure to design an enclosure that will keep those high voltages safe. I tested mine with various Nixie tubes I had in my studio, but I’m still looking for that perfect set to build the ultimate clock.