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Nixi Neon Numerical Indicator This neon filled Nixi tube is being held close to a small Tesla Coil and is showing the number three. I sometimes use this as a demonstration. Each wire is coded with the resistor colour code. If anyone asks for a number between 0 and 9, all I have to do is hold appropriate wire and the number appears as I earth its lead. Obviously, I am holding the orange wire here. Keywords: Miscellaneous

Nixi Neon Numerical Indicator

This neon filled Nixi tube is being held close to a small Tesla Coil and is showing the number three. I sometimes use this as a demonstration. Each wire is coded with the resistor colour code. If anyone asks for a number between 0 and 9, all I have to do is hold appropriate wire and the number appears as I earth its lead. Obviously, I am holding the orange wire here.

Copper-K~0.jpg puddle_flash.jpg nixi.jpg Lucalox.jpg HPLR400.jpg
File information
Filename:nixi.jpg
Album name:Tuopeek / Misc
Keywords:Miscellaneous
Filesize:444 KiB
Date added:17 Dec 2025
Dimensions:2500 x 2279 pixels
Displayed:14 times
DateTime Original:2025:12:17 22:57:24
Exposure Time:1/125 sec
FNumber:f/3.5
File Source:Digital Still Camera
Flash:No Flash
Focal length:18 mm
ISO:1000
Model:NIKON D3400
Software:Adobe Photoshop Elements 2.0
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1071
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Comment 1 to 10 of 10
Page: 1

Max   [Thu 18 Dec 2025 at 10:11]
Nice trick, you must be getting some interesting reactions to that!
Tuopeek   [Thu 18 Dec 2025 at 17:37]
Thank, yes, youngsters often show a moment of complete surprise. Importantly, it gets them to engage and think about it for a few moments at least. Then, when they can't understand it they accept it as magic and are happy Laughing
Sammi   [Thu 18 Dec 2025 at 18:54]
I've just been having a shufti at a kit to build our own clock.! Cool
Tuopeek   [Thu 18 Dec 2025 at 19:03]
They're cool but Nixi's tubes are a bit pricey. Feel there is still a market for them to be manufactured in bulk.
Sammi   [Fri 19 Dec 2025 at 13:34]
Everything that we need will be just over two hundred quid, and the interest I get on my savings account at the end of December will cover that. Cool
AgentHalogen_87   [Fri 19 Dec 2025 at 17:17]
Very cool display piece. Along with the Numitron which uses tiny filaments in a 7-segment display, they are very niche bits of history
Tuopeek   [Fri 19 Dec 2025 at 19:42]
Nice project Sammi, I quite like the ones that use old oscilloscope tubes as clocks, but they burn the screen, if left on all the time. I did get a circuit that allows 'Pong' to be played on an oscilloscope.
AgentHalogen: thanks. I might have one 7-segment of the Numitron tech you mention. I'll see if I can dig it out.
Sammi   [Wed 24 Dec 2025 at 22:50]
This is the kit that I was thinking of getting, buying it all as a bundle is slightly cheaper. Cool
Tuopeek   [Fri 26 Dec 2025 at 11:19]
Sammi, Nice project, although quite expensive right enough. I think the cost of Nixi tubes will be the bulk of it though. I’d enjoy soldering all that together, although I don’t like lead-free solder to work with as much as old leaded stuff. It is improving a bit though. Wish I had collected more Nixi tubes at the time. I’ve dismantled loads of old Nixi stuff over the years and now it quite rare to find.
Sammi   [Tue 30 Dec 2025 at 19:56]
Oh we've got plenty of the proper stuff, the company that sells the kit will sell you solder if you need it.! Love

Comment 1 to 10 of 10
Page: 1