My new IN-12 Nixie Clock

My new IN-12 Nixie Clock

My new IN-12 Nixie Clock Project.

There are different nixie tubes still available on the market. The most popular and well know nixie tubes are IN-18, IN-14, IN-12. In my projects I use IN-14 tubes, however, as I have some IN-12 nixie tubes I made my next nixie clock project based on these tubes.The IN-12A is 80th cold cathode tube made in USSR and is by far the most common nixie found on the market. The IN-12A has 12 pins. Pin 1 is the anode. This pin is tied to 170-200V DC. Pins 2-11 are the individual number cathode pins. When we want to light up a particular number, we place 0V on the corresponding cathode pin. The IN-12A has a strike voltage of about 170V, that is the voltage at which conduction between the anode and cathode can begin so the number can light up due to corona effect. For conduction to start, it takes time, as the gas inside the nixie tube needs an ionized path from anode to cathode. Once conducting, the anode to cathode voltage will drop and current will increase. Both will reach a steady state in about 100us. After conduction, the anode to cathode voltage dropped to about 143V. This is below the strike voltage but the ionized gas path will remain.

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Nixie Dream was founded in 2014 as a small family owned business of three engineers being passioned about retro nixie technology. We have combined retro nixie technology with pure wood nature and built the nixie clock which is truly unique. Our aim is to provide not only quality nixie clocks, but ones that will make a lasting impression. Our business is located in the heart of Ukraine - in Kiev. Feel free to contact us at any time.