Hi Jarod
I skipped neon bulbs and and used trigger tubes. My first clock used
XC18 tubes which originally had (long-gone) radioactive doping to get
reliable operation in the dark. I then used Z700U tubes which have a
primer electrode and do operate reliably in the dark.
Does anyone have experience with neon bulb ring counters operating in
the dark?
Grahame
On 22/07/2025 21:07, Joe Croft wrote:
Hi Jarod,
I saw that about the ne-2 diodes. My solution was much more painful. I
went through the neon lamps and matched them. I look forward to seeing
the final clock!
-joe
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On Jul 21 2025, at 11:48 pm, Jarod Findley <[email protected]> wrote:
I hoping the design I used is going to be robust enough for my
circuit. If you haven't read the attached website to the pdf I
linked he has some very good information on ring counters and why
the ne2 is so difficult to use in them. Im hoping the in28 are
similar enough to be adapted.
My next purchase definitely is going to be a quality bread boat
and scope for doing some diagnostic work. Thanks for info and help
guys ill definitely be simulating and real world testing. Ill keep
the group posted
On Mon, Jul 21, 2025, 9:16 PM Joe Croft <[email protected]> wrote:
Hi Jarod.
This reminds me of my NixieNeon clock,
https://www.nixieneon.com/main/nixieneon-clock-documentation/.
<https://www.nixieneon.com/main/nixieneon-clock-documentation/>
This clock was a lot of fun but the ring counters could be
hell! I had a lot of matching to do with the neon bulbs.
Granted, I was using NE-2 lamps, not triggered neons for the
counters. But the best I can tell, you are not using the
trigger leads. Ig nore the processor, it is mostly for setting
the time as well as giving a little eye candy every 5 minutes.
The rings will free run with out the processor.
I recommend you bread board one or two of the rings.Also, I
was not able to coulpe just using a capacitor and a diode. I
ended up needing a transistor. Of course all of that could
have been from my short comings in hardware design (I am
principally a software guy who loves the smell of rosin) .
I hope your clock works out for you. I still have a love for
ring counters like these.
-joe
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On Jul 18 2025, at 5:14 pm, Jarod Findley
<[email protected]> wrote:
Hi all this is my second post and I'm still learning a
lot about nixies-neon tubes and how they work. This is my
first project design i used this schematic
<https://www.pa3fwm.nl/projects/neonclock2/pa3fwm_neonclock2_schematic.pdf> to
design a clock around in-28 neon tubes and some large size
nixies like zin-70. I have not calculated values for the
resistors and such nor have I tested anything yet. Id like
to know if my design is correct before I move it into the
real world. It will have a ring counter for the Hours,
Minutes, Seconds, Am Pm, and a 60 ring counter to visually
indicate the seconds. This will be a 12 hour clock and
have Am Pm tubes. My plan is to design a nice case and
have it displayed in my living room. I know its ambitious
for a first time project and apricate any feed back,
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