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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Hi all. Reckon its possible to build a working 1" corona generating mini SSTC in a wand? I seem to recall some discussion online that it was possible to parallel connect several CCFL inverters using the piezo transformers in order to get around 1.5KV at 500mA to drive the primary tank circuit.
Obviously the battery life would suck but it would be an amusing hack. (plus it would be just the thing for bragging about in the queue for "Deathly Hallows pt. 2")
Registered Member #2887
Joined: Sat May 29 2010, 11:10PM
Location: Panama City, Panama
Posts: 107
I think it would be possible, although EXTREMELY hard to achieve. People have made small tesla coils before (google mini tesla coil), you could use surface mount for the driver, use a counterpoise similar to this for RF ground.
Your greatest challenge would be powering the whole thing. If you didn't mind, it would be feasable to have a battery pack strapped to your arm and sopme cables leading to a small multiplier inside the wand. If you wanted everything to be self-contained, you would need an aufully small battery with a large charge, and lots of good luck.
Bear in mind this is an advanced projct, as you will need to do lots of surface mount, double sided boards (and a small, long heatsink for the power igbt\mosfet). For this power levels though, I think that it would be feasable, altough hard to get everything to fit that formfactor.
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
Look at "Violet ray machines". Small Tesla coil devices used for somewhat quack medicine, that are still produced. They are wand-like devices, somewhat thicker because of the required secondary coil.
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
Even if you got it to work it wouldn't be very impressive to anyone apart from coilers.
Would it be possible to shoot an interrupted stream of water of electrostatically charged water and get an arc across that? First fire a meter or so of streams (say a couple of cm of water with small air gaps in between) with the water being charged at the gun, then you reverse the polarity at the gun, getting a cascading arc between the gun and the streams?
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Powering it with wireless power is doable. Now this would be cool, no wires needed and the magic "looks" convincing. Plus it would then not need charging, batteries etc as long as the external pack held out.
Registered Member #3624
Joined: Mon Jan 17 2011, 01:08AM
Location:
Posts: 25
In theory, yes, but in practice, no. You could have a tiny cascade powered by a plutonium battery :) but unless you used some super concentrated power source and tiny caps, it would be too big to look like a wand. Or it could be powered wirelessly like Conundrum said, but you would still need tiny caps.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062
Circuit is coming along nicely.
In order to make this work I will need to wind one secondary inside the other. best bet here is to use glass tubes such as old broken CCFLs as they are readily available once well cleaned and dried.
Luckily my frequency meter still works so I can determine resonance under load for the two identical piezos from Sony laptop inverters.
The drive circuit is actually pretty simple, just a single small primary circuit with centre tap, two transistors, and a pair of secondaries using the primary piezo capacitance as the resonant circuit. As for keeping it in resonance this could be the "fun" part, I expect that some sort of trimming of input voltage will be needed.
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Tesla Coil in "Lord Voldemort" (tm) wand?
