Making A 5-Section Show With Platinum-Titanium Cathodes

Before the arrival of efficient semiconductor LEDs many show sorts existed to show issues like numbers and different characters. The Nixie tube is a well known one, together with VFDs and there are additionally lesser identified ones equivalent to Burrough’s Panaplex, which all noticed plentiful use in every little thing from calculators to audio gear. The design that [Witchcraft and Alchemy] made appears to lean heavily on this Panaplex design.

Rather than neon, this makes use of argon because the fuel. The anode is fashioned by the indium-tin oxide layer on a chunk of glass, with the cathode sputtered onto the opposite aspect within the type of first a titanium layer adopted by platinum. This mixture helps to stop the latter from flaking off because of incompatibilities between the molecular matrices of the glass and platinum.

Since that is an early prototype, solely 5 segments had been sputtered onto the glass and pushed with a 74141 Nixie driver IC, creating the anticipated purple glow in a vacuum chamber. Following this a self-contained prototype was created, however this proved to be much less profitable, with the prototype rapidly failing to mild up as anticipated.

For a subsequent try no tape or epoxy for sealing the gadget will probably be used, however relatively a gasket as an alternative of gluing the entrance glass onto the gadget. The use of conductive vias ought to make the gadget’s vacuum extra everlasting, and allow these final two segments to make it a seven-segment show. The remaining change ought to be to make use of a Penning mixture as an alternative of pure argon.