Make your own 7 segment displays..With Neon light

Using a 3D printed frame and some Ne-2 neon lamps you can make your own impressive seven segment displays.

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Great visibility! Simple to make and very inexpensive. If you want a neon orange display you can churn these things out till the cows come home. Custom characters can also be made as demonstrated in the tube/relay computer photo showing +, - and Equals signs.
I am expanding the characters to include as many alphanumeric characters and symbols as I can thing up. An old technology can bring hope for the future!

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roelh wrote 04/02/2018 at 14:44 point

Hi castvee,

you apparently used vacuum tubes in a adder circuit. Can you give the schematic of the circuit ? Vacuum tubes might be a good application for my One Transistor Flipflop (that also could be called One Tube Flipflop)

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castvee8 wrote 04/02/2018 at 14:50 point

I Designed my own adders,flip flops and register latches for the machines. I also did a one transistor latch as well. I have not got around to drawing any real schematics for that stuff as I never imagined anyone would be interested and probably laugh if I did. But will see what I can do. I made some very clever circuits to run all that stuff.

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castvee8 wrote 03/27/2018 at 19:10 point

I have braced myself for the rotton fruit throwing sure to come.

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DeepSOIC wrote 03/16/2018 at 10:01 point

Ne2?? It's just Ne, these atoms won't stick to each other...

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castvee8 wrote 03/16/2018 at 11:36 point

They stick so bad it's repulsive........

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Dr. Cockroach wrote 03/15/2018 at 23:48 point

If I ever do a relay adder build then that is the display I want to use :-)

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Dr. Cockroach wrote 03/16/2018 at 00:10 point

I am not the one to stop such a noble project, gota love it :-)

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castvee8 wrote 03/16/2018 at 00:09 point

Ha....I thought the same thing....jokingly at first....but then the disease of serious vintage bit me...and now I can't stop..Right now I am building an all vacuum tube version...Somebody stop me....Please!!!!!!

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Ted Yapo wrote 03/15/2018 at 14:08 point

Have you thought about using the storage capability of neon bulbs to make the display non-volatile?  The idea would be to bias the bulbs slightly above their maintaining voltage, but below their strike voltage.  You could turn on a segment with a capacitively-coupled pulse, and turn it back off by killing the supply.

I know these voltages aren't well-specified, and change as the bulb ages, but it might be an interesting way to make a multiplexed display that you just have to write once to store state.

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castvee8 wrote 03/15/2018 at 14:31 point

Certainly something to explore. My first applications did not require multiplexing so I have not tried much in that direction. Hoping to get more feedback like this as the contest proceeds for future project logs.

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David Scholten wrote 03/13/2018 at 01:50 point

Brings a smile to my face :)

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castvee8 wrote 03/13/2018 at 14:38 point

Hopefully in a good way!

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