First introduced in 1955, Nixie tubes were originally employed as numeric displays in digital voltmeters, frequency counters, and early calculators. These glass-encased components were a staple in electronics until the 1970s, when they were eventually replaced by the more efficient and compact LEDs. Each Nixie tube consists of a wire-mesh anode and several cathodes, each shaped like a numeral. When power is applied to a specific cathode, it illuminates with a distinctive orange glow, creating a striking visual effect. This unique glow serves as a nostalgic reminder of the early days of digital technology, evoking a sense of retro charm and historical significance.