Keith Moore (also known as Nixie Keith) taught audiences how to create electronic gadgets Thursday evening at 5:30PM in Atlanta 1-2, Courtland Grand, focusing on high-voltage devices running above 50 volts. No need to be intimidated; Nixie Keith recommends beginning with low-voltage components in order to practice basic electronics concepts. Numitron cathode tubes, which run at 5 volts, are accessible, inexpensive, and reliable. When powered-on, numitrons light up with numbers. Vertical numitron displays can be used to create retro-chic items like clocks and timers.

Nixie tubes are popular components with distinctive wire cathodes. Wires are bent into letters, numbers, or symbols that impart a warm glow when their respective cathodes are electrified. Nixies have seen a rise in popularity in recent years owing to their unique functionality and charm. Domestically-produced reproduction units are available for aficionados, but Moore recommends beginners start with one of the many vintage Nixie tubes available online. Newer nixies may contain mercury gas to ensure the thin cathodes’ longevity, but they are completely safe to use as long as they remain intact.  

Other components discussed were dekatrons and magic eyes. Filled with neon or argon gas, dekatrons become visual displays when electrified. Generally used for electronic registers or counters, dekatrons are uniquely useful for their high refresh rates. On the more whimsical side, Moore recommended using dekatrons to create spinner displays. Magic eyes visually indicate the strength of the input signal and may be used to tune radios, stereos, and analog televisions.

If voltage is optimized, all these components may be used in tandem to create custom machines. Tinkerers are limited only by their imaginations–and their power outlets.