Some videos of a National Union Inditron GI-10

[Paul Andrews]

I finally got around to wiring my GI-10 up to an MCU so I could use it in an active display. The videos below just show it cycling through all of its digits. The top view video doesn't do it justice - it looks really nice. I might have to make it some special one-tube clock hardware, rather than having to use a breadboard, unless I can get hold of a bunch (three?) more of them. Not that I would leave it permanently running, but it is nice to see these things actually displaying digits now and again:

https://youtu.be/V4RNbD4mX1U

https://youtu.be/0hv91jbHAXk

I used a HV509 to drive it so I could actively push each digit back up to anode potential.

[jb-electronics]

This is beautiful, thank you for recording it! Jens

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[MichaelS]

Thanks, Paul.

It's great to see one of these running.  I'd read that they're hard to drive and not very reliable, but who knows.

Good luck with the project!

Michael

[Paul Andrews]

I was wondering if I could use the same circuit to drive any Nixies tube. It seemed a reasonable assumption, but I didn't want to mess up any of my other tubes. Then I remembered that I had an IN-16 that was missing its anode wire (it is also missing the wire for the digit 4 as you will see). So I wired it up in place of the GI-10 and, what do you know? It worked.

So I guess that this circuit could be considered a more general Nixie circuit than the regular one that requires an anode. And now that I am writing this, I am reminded that I was trying to figure out a universal adapter for a one-tube-clock that would allow me to plug in an arbitrary tube that uses flying leads rather than pins - I could modify the software to map digits to pins. The sticking point I had was that I had to treat the anode pin differently than all of the other pins. With this design, I don't. I think I might try that (or at least add it to the list of projects I need to get around to at some point).

Anyway. Enough ramblings. Here is the video that you have all been waiting for - a Proof of Concept if you will:

https://www.youtube.com/watch?v=Tu9wi_Ol6n0