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Forums
4hv.org :: Forums :: Tesla Coils
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The Tesla Star

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Tesladownunder
Sun Nov 18 2007, 11:31PM Print
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
The Tesla 5 pointed star. Actually looks more like a flower.
Any idea how it was done?

TDU
1195428422 10 FT0 Teslastarfine
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Bauerb2
Mon Nov 19 2007, 12:05AM
Bauerb2 Registered Member #973 Joined: Tue Aug 28 2007, 07:32PM
Location: Pittsburgh, PA
Posts: 66
a rotating arm atop a coil arcing to 5 ground objects spaced evenly around it as it spins.
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Firnagzen
Mon Nov 19 2007, 02:43AM
Firnagzen Registered Member #567 Joined: Tue Mar 06 2007, 10:55AM
Location: Singapore
Posts: 147
Long exposure (duh, as if any of your special effects pictures are ever anything else), put in one target for x seconds, remove, place another. Probably with a long stick.
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Tetrafluoroethane
Mon Nov 19 2007, 03:49AM
Tetrafluoroethane Registered Member #127 Joined: Fri Feb 10 2006, 03:36PM
Location: Cincinnati, OH - USA
Posts: 44
Photoshop? Ha ha ha. Just kidding TDU. I suspect the rotating arm and 5 ground points, but you did manage to achieve quite a nice separation between the points.
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Tesladownunder
Mon Nov 19 2007, 04:15AM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
Firnagzen wrote ...

Long exposure (duh, as if any of your special effects pictures are ever anything else), put in one target for x seconds, remove, place another. Probably with a long stick.
Hmmm.... I think I took an ordinary photo once. No, maybe I imagined it. I don't do sticks.

Bauerb2 wrote ...

a rotating arm atop a coil arcing to 5 ground objects spaced evenly around it as it spins.
Correct. And where was I standing to take the picture?

TDU
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Coronafix
Mon Nov 19 2007, 05:35AM
Coronafix Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
On top of your shipping container?
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Tesladownunder
Mon Nov 19 2007, 08:41AM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
My big TC is 7ft and the shipping container is 8ft. Even up a ladder you won't get that sort of view.
Any other suggestions?

TDU
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Mates
Mon Nov 19 2007, 08:47AM
Mates Registered Member #1025 Joined: Sun Sept 23 2007, 07:53PM
Location: Czech Rep.
Posts: 566
Tesladownunder wrote ...

My big TC is 7ft and the shipping container is 8ft. Even up a ladder you won't get that sort of view.
Any other suggestions?

TDU

Camera hanging on the tree...

BTW: Great magic you perform
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Firnagzen
Mon Nov 19 2007, 10:15AM
Firnagzen Registered Member #567 Joined: Tue Mar 06 2007, 10:55AM
Location: Singapore
Posts: 147
I second the camera... You showed it hanging on a tree some time ago. There was a picture...
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Tesladownunder
Mon Nov 19 2007, 11:53AM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
Correct. I used my "skycam" suspended about 17 feet in the air ie 10 feet above the TC using a wide angle lens. It is in a custom support which is rain/sun/EMF resistant yet able to pass IR from the font to allow the long distance remote control to work. Also the flash can be used.

I turn the camera on and prefocus at 10 feet and set exposure for 15 seconds. Then it is assembled and screwed/fastened in position. Once it is lofted up, I get a torch and look at the multiple lens reflections to get the exact aim. I did also have balancing rods/level markers as well. There is a separate fine fishing line from one of the balancing rods to provide damping and reduce swinging. It is attached at right angles to a fixed ground object (my control box).

The TC is run in a normal vertical position. Around it I have 5 x 6 foot earthed vertical rods which protrude roughly level with my short rotating breakout point. The gap from breakout point to rotating rod is only about 2 feet in the top photo and I think 3 feet in the bottom. I couldn't have it too wide or the camera won't fit it in.

The third picture has me on the ground looking up. Everything except the sparks are blurred because there was wind moving the camera - even at 10pm when I had my final shot. Hence the round toroid and the circle of the breakout points are odd shapes.

This hasn't been as star shaped as I would have liked. I could have done a horizontal setup much more easily but wanted to get some experience with the elevated camera. A windless night is a requirement. So on to further planning for an Xmas tree in sparks.....

TDU
1195472771 10 FT34476 Skycaminternal

1195472771 10 FT34476 Skycammorning

1195472771 10 FT34476 Teslastarthick
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