Electronics > Projects, Designs, and Technical Stuff
Custom Nixie Tube Clock Review
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BillyD:
This is not directly related to your schematic design as such, but might be useful to you.
I built a couple of those nixie kit clocks from https://www.pvelectronics.co.uk/index.php?main_page=index&cPath=21 a few years ago and they came out very well.
One of the things I really liked about their design was 'qtc' - quick change tube. So each nixie is mounted on a separate little board so you can easily test and swap them out without any difficult in-place soldering/desoldering.
Evangelopoulos Panagiotis:

--- Quote from: BillyD on May 30, 2019, 11:07:14 am ---This is not directly related to your schematic design as such, but might be useful to you.
I built a couple of those nixie kit clocks from https://www.pvelectronics.co.uk/index.php?main_page=index&cPath=21 a few years ago and they came out very well.
One of the things I really liked about their design was 'qtc' - quick change tube. So each nixie is mounted on a separate little board so you can easily test and swap them out without any difficult in-place soldering/desoldering.

--- End quote ---

I'll be using IN-12Bs in sockets  ;) Cause you never know when one will fail and you'll need to replace it. Also I'd be doing the same for the Nixie driver ICs since they are old and they could malfunction.
NivagSwerdna:
Example (ignore the C if you already have some on the output side of your supply)
NivagSwerdna:

--- Quote from: EvangelopoulosPanagiotis on May 30, 2019, 10:41:03 am ---
--- Quote from: JackJones on May 30, 2019, 10:21:02 am ---Also don't forget the SQW is an open collector, you need a pullup resistor for it to work.

--- End quote ---
Ah indeed. Will the built-in pull-up resistor of the digital pin work? Or should I add an external 10k?

--- End quote ---

FWIW I have 10K pull-ups on the DS3231 output and I2C in mine....
Evangelopoulos Panagiotis:

--- Quote from: NivagSwerdna on May 30, 2019, 12:04:46 pm ---Example (ignore the C if you already have some on the output side of your supply)

--- End quote ---

Awesome! Thank you so much for your help, feedback and ideas.
This is the updated schematic that I think has everything I'll ever need.

P.S. I saw that I cannot have multiple dot points being displayed at the same time since the driver does not allow multiple outputs to be enabled. But to be honest I doubt I'll ever have two dots on at the same time
and moreover I'm too lazy to build discrete transistor drivers for those. :P
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