For his Hackaday Prize entry, [castvee8] is making seven-segment displays out of vintage neon lamps. It looks great, and it’s the basis of an all-vacuum tube calculator. The core of this build ...

Everyone knows that one of the coolest things to do with a Tesla coil is to light up neon or fluorescent tubes ... Replace that single large tube with an array of smaller ones.

defying the traditional tube-bound forms of neon, which require both ends to be sealed. One plant-like specimen reaches skyward, a white-blue light coursing from its base and splitting off into ...