Check out this home made panaplex display. Panaplex displays are closely related to nixie tubes, but instead of layering individual numbers and lighting them separately, it uses pieces to build the numbers like a digital display. [Lindsay] managed to make one at home, using a jam jar as the vacuum tube. Argon as the gas in the tube gives it a pleasant purple color. We really think the end result is fantastic, you can see some build pictures and a run through of the numbers on the site. Unfortunately there aren’t any videos of the display in action.