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My take on a nixie clock

As a present I decided to build a nixie tube clock. It was essential to ditch my close-enough attitude and make it look as good as possible. For me the simplest way to complete this idea was to use a microcontroller. I am not cool enough to build a clock out of discrete logic, maybe in the future.

I had couple of nixie tubes lying around, I ordered some more to have a total of six. So the clock consist of an Arduino Nano, RTC DS3231, nixie tubes - IN-14 and a power supply. From the start I knew the biggest challenge is building the enclosure. I learned that the easiest way to drive these nixie tubes is with a driver called - К155ИД1.

It’s a binary to decimal decoder and it works quite elegantly. Depending on the binary input it enables the right output.

It does all the heavy lifting. And then I used three shift registers to drive all the drivers.

In addition I bought a nixie tube power supply that supplies the 170v I need. I could have used 220v wall power but I do not trust myself enou…