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    I don't see a lot of ИН-2 based clocks. I tried to make mine as compact as possible. Unlike Patashnik, it multiplexes the tubes so there's only one ИД1 and ATmega8 has enough pins plus a few more to spare.

    IN-2's are not very suitable for clocks, perhaps, because of their tunnel vision. View angles for the "deep" digits are very narrow. The tubes are small, but it's impossible to make very compact displays with them because their cylindrical shape doesn't allow for rational use of space.

    Project writeup:

    farnea and bent-tronics added this photo to their favorites.

    1. farnea 52 months ago | reply

      I love it!

    2. Prime-Mover 51 months ago | reply

      So many nixie clock projects are let down by the enclosure design but this one is great. Can you give any more information on how the aluminium was rolled into the desired shape? One reason IN-2's are avoided is because it is widely believed they have a short life.

    3. svofski 51 months ago | reply

      Hi Prime-Mover! The aluminium was already in very similar shape: it's cut from a bottle (not a can, but a bottle, something not unlike this: ) -- the sheet I got is probably about 0.8mm thick, that's good enough for a small case. I modeled the cutout shapes in Blender, printed and prototyped with a toilet paper roll, like here:

      Then I transferred the shape on the bottle and made cutouts with a Dremel equipped with a corn mill bit. I did some adjustments to give the sheet a little bit of a teardrop profile, but it's not like real bending, just tweaking. Basically I re-purposed the bottle.

      I heard that IN-2's have short life, but I have to see it for myself. Even if they entertain me for one year, that's worth it.

    4. Prime-Mover 51 months ago | reply

      Thanks for the information. I had wondered what you used to project the round tube cutouts onto the curved aluminium surface (I studied technical drawing many years ago but never learnt how to do this). I've just completed the electronics for an IN-12 and an IN-18 clock and have been looking for some inspiriation for the enclosures. This is one of the best I've seen so far.

    5. svofski 51 months ago | reply

      Thanks for your kind words. Learning Blender or Sketchup may really take a long time and they're not even all that great as CAD programs so maybe cardboard mockups is the shortest route. Best luck to you!

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