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A long, long time ago when lcd’s wherent avvaible. What did they use? They did have cold cathode neon readout tubes.  Apopular brands of these tubes was—the NIXIE, but how did it work?

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just like any regular light bulb, but they could variate between numbers, lol

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Johny

Johny (John-Erik) Krahbichler is the CEO and main author of Gadgetzz, since 2009. While Mr. Krahbichler's expertise is in consumer electronics, his true passion is science´, and educating the world about the universe we inhabit. Check out the non-profit Scientific Literacy Matters Currently Johny is using his experience from covering trade shows such as the CES, to work with trade show exhibition marketing.

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