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4hv.org :: Forums :: General Chatting
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"A Safe Jacob's Ladder"

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Avi
Thu Nov 04 2010, 08:22AM Print
Avi Registered Member #580 Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
I found this, some of you may be interested in the concept.
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Martin King
Thu Nov 04 2010, 10:24AM
Martin King Registered Member #3040 Joined: Tue Jul 27 2010, 03:15PM
Location: South of London. UK
Posts: 237
I've sometimes seen requirements for jacobs ladder type effects to be used on stage so that would be a good way of doing it.

Martin.
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Adam Munich
Thu Nov 04 2010, 10:51AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Oh that's not fooling anyone. I came to this thread expecting something along the lines of a GFCI that killed it if it detected a "short". Something like the sawstop but for jacob's ladders.
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Killa-X
Thu Nov 04 2010, 02:39PM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Grenadier wrote ...

Oh that's not fooling anyone. I came to this thread expecting something along the lines of a GFCI that killed it if it detected a "short". Something like the sawstop but for jacob's ladders.

Then you just get a board install 4 corner pillars, and install some optical sensors. This way when something like a hand passes through, power is cut :P

If you really wanted one for Halloween all you do us just fence the area off :P
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Adam Munich
Thu Nov 04 2010, 07:38PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
Jacobs ladder + 445nm 1W laser trip sensor FTW. That would look really cool, and be safe.
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Killa-X
Thu Nov 04 2010, 08:01PM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Grenadier wrote ...

Jacobs ladder + 445nm 1W laser trip sensor FTW. That would look really cool, and be safe.

And then, the poor kid with the pretty metal bracelet, tries to go at it...The laser turns it off, but oh dear god, it shot into his/her eye! Instantly blinded...This is why we use like a 0.1 or 0.01mW laser...
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Adam Munich
Thu Nov 04 2010, 10:32PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
It was just an idea, it's not like anyone would even consider relying on a laser to protect that little kid from 15,000 volts anyway. However, it would make a beast Halloween prop. I mean who wouldn't like a jacob's ladder inside a laser cage?

Also, I'd rather get a diffused* laser blast to the eye than be electrocuted any day, and I'm sure someone else would too.

*bracelet would have convex metal surfaces.
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Killa-X
Fri Nov 05 2010, 12:25AM
Killa-X Registered Member #1643 Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
I can touch a NST and probably live given it was one hand....or I can get instantly blinded by a diffused 1W....you do relies these blue 1W will blind you very very quickly, if not instantly, even if it's diffused to say...10ft wide on your face.

But yeah I get your point...

If you want a safe visible beam, get a little smoke from a smoke machine and use a 1mw red. Then it's ladder in smoke :D
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