I guarantee that the IN-12 was selected because it is available for
cheap and in high quantity.. The fact that it is also 18mm digit height
is bonus. (Sad to say, 18mm digit height nowadays is considered very large.)
The IN-17 would also be a good solution, since it is also cheap, but I
think they have a 9mm digit height. You would need less power to drive
IN-17's. I've never understood this hangup that some people have about
the "upside down 2's". But as I've said before: You all can keep your
hangups.. it just drives down prices on the offending nixies and more
nixies for me. :)
-Adam W7QI
On 7/20/2012 5:57 PM, Erick Anderson wrote:
I've been toying with the idea of building a Nixie Sudoku like the one
posted on Trashbear Labs. I don't know whether I can use some other
tube instead of the IN-12's shown. I've never been a fan of the 5 made
from an inverted 2. Looking at Dieter's database I can see that there
are a number of tubes (e.g. ZM1180) of similar size and with a
similar-looking pin arrangement on the bottom, but I don't know if
they're similar enough to use the same socket. The other problem is
finding an alternate tube in sufficient quantity to build the thing.
Alternately I could try to adapt the design to use the smaller IN-17
tube since that one has a proper 5. I've never done any PCB design
before so that would be a challenge. --
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