I really like nixie tubes. As a matter of fact, i have already order myself some to experiment with and make some more artistic projects. This project that Kenenth made will help me a lot to make the high voltage driver required. He wired 3 nixie tubes to make a 3-digits thermometer. The temperature is acquired from a DS1631 digital thermometer, connected to a ATTiny2313 AVR. A boost voltage converter converts the 12 volts to the 180 volts required to drive the nixie tubes. Three K155 drive the tubes to display the numbers. Cool and simple, very simple!