Ever heard of Nixie? Honestly, I hadn't until this piece came across my desk, though apparently the brand has been camouflaging itself on the shelves of my walkable grocery store for who knows how ...

Nixie tubes are cool, and hackers like them. Perhaps for those reasons more than any other, [Kevin Santo Cappuccio] has developed a very particular Simple Add-On for the 2024 Hackaday Supercon badge.