Everybody loves plasma globes, but if you are like [zrgzhv], building them as large as possible is the challenge! Definitely a beautiful project, at 7 feet long and 1 foot in diameter, this monster tube makes an impressive display of plasma filaments that slowly move inside. Heck, they almost seem to be alive following the movements of his hand and it’s hard not to become mesmerized by the motion.
This tube follows the same principle of operation as its smaller cousin, the plasma globe. Air is evacuated and the tube is filled with a mixture of noble gases, with the particular mixture being responsible for the color of the filaments. Then, high voltage AC is applied to an electrode, which causes the moving tendrils of colored light to extend from the electrode to the outer glass, a phenomenon known as glow discharge. In general, gas-filled tubes can have other uses such as lightning — in the form of fluorescent, neon and xenon lamps — or high power switching as in the thyratron tube, among other applications.
The tube has a weight of over 65 pounds, and needs 300 watts of power to operate from an also homemade power supply. In another video, you can see 10 tubes of different colors working at once. Plasma always makes a great attention-getter; another nice example of its use can be seen in this steampunk lamp which incorporates rotating contacts on the outside of the glass.
Now it is for stuff like this why I keep coming to this website! :) This is really well done.
PS: Mute the music in the video and play this one along: https://soundcloud.com/villagegreen181/dead-light-blooms
No. This track (or similar): https://soundcloud.com/valentinojorno/valentino-jorno-x-files-sex-styles
“In general, gas-filled tubes can have other uses such as lightning…”
Cool, and I prefer thunder storms for lighting.
There is nothing like the light of lightning, directly overhead.
That thing is definitely full of lightning.
That is so awesome, damn i want one!
This is beautiful. And just in time for Halloween.
A bigger one with an airlock, so you can sleep in it.
So awesome…………….. it put me out of my rant mood :).
(For the curious the rant mood was caused by: battery pack X blew up an X86_64 tablet by manufacturer Y that I just got a linux distro booting on, may still do a video….)
Wow, I’d have been seething for weeks because of something like that.
Cool. …but why is the guy naked in the first picture?
It looks like he’s wearing gray pants to me… Thank goodness.
Can somebody explain me why these arc move so slowly? Almost all video I saw about things like this or made myself, moved way faster, just look at a plasma globe, why so much difference?
Nice project otherwise!
The video does say “1/4 real speed”…
Best demonstration of different gasses and pressures are from Carl Willis:
https://www.youtube.com/channel/UCGN8m6iGkxnmQnGezVxxnmg/videos
He has several videos of tubes he’s made but I like this one for showing differences:
https://www.youtube.com/watch?v=l3M0cY29Pq0
In one of them he talks about why some gasses for better filaments and move slower.
Gaslinger has some good ones too:
https://www.youtube.com/watch?v=t4S67EskNS0
He has lots of neat tube videos and has been seen on Hackaday before. I personally get a bit creeped out by seeing an old man working in a shop while he’s wearing a dress, though.
Just a thought: Would it be possible to mount a laser inside the tube and control the direction of the discharge by ionising a path with laser light ?
Would it work ?
Can you go into depth on the power supply circuit ,the controls and how you constructed it ? Thanks: )