Can Crusher 4 using a pulse capacitor bank rated up to 10 kJ. Time to get serious! My big caps have arrived. Total stored energy with all charged to capacity is 10 + 10 + 8 = 28 kJ.
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High voltage halo effects are done with a long exposure of a rotating spark with a colour filter.
Here are some of the effects that are produced by long exposures in a similar manner to the Eye of Sauron effect but not using a Tesla coil.
The photo above shows the “Sombrero” . Well it was meant to be a crown really. Note the reflection in the stainless steel ball which shows the sombrero as well as the flash and my wife and son operating the equipment.
Note that as in all my photos there is no “photoshopping”. The pictures are all single shots and effects are produced with long exposures. Here’s how this one is done:
The HV supply I wired to a rotating setup that holds the electrodes.
The electrodes which will rotate around the ball (or my head) and on a long exposure with appropriate orange filter which is removed before a flash to give “normal” lighting for my head.
The photo above shows the effect off a higher current changing the bright sparks into a flaming arc. I should add that the whole sensation is a bit strange. The ionic wind and charge accumulation on my hair means I can feel exactly where the electrode is.
The photo above shows an ‘electric kris’. The kris is an Indonesian curved dagger.
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Indonesian curved dagger
Photo Date: March 29, 2008
This is a single 10 second photographic exposure of Tesla coil sparks where a rotating colour wheel gives different colours to the sparks. There is no photoshopping ever on this site.
My early attempts at colour effects were taken on my ignition coil setup.
These are simply done by taking a long exposure (6 seconds) and manually placing different coloured filters in front of the lens at different times during that exposure. The next step was to make a motorized system for some special effects coming up to simulate the “Red Alert” game Tesla coil.
I have now made a color wheel to allow rapid rotation of the colours or manual rotation. This simply gets placed in front of the camera.
The results with a Tesla coil are to give sparks that are different colours. I have green as well. Each quadrant is held by one screw and slides out.
Left photo with a 1 second exposure, shows the some shots at dusk. Right photo with a 2 second exposure shows the various colors seen when the sparks are firing.
Now the good ones.
Red sparks can be done as well and are dramatic. This effect is created by taking a normal white flash shot first to give the correct white background, then switching to the red filter and running the sparks for 10 seconds or so while the camera is recording. It is all one single exposure and is what the camera sees, not a photoshopped effect added later.
This shows coloured sparks. This effect is also created by taking a white flash shot first to give the correct white background then running the yellow filter or spinning the colour wheel to get different effects.
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Photo Date: Sept 2, 2007
Long sparks from ignition coils plus a large mercury floodlight give interesting effects.
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Video: “Tesla Envy – getting VERY close to huge sparks”. The title is a play on words and … well you will just have to see for yourself.
The 1:44 min video includes sparks from my largest Tesla coil striking a Faraday cage only inches from my face (and me looking like a dork).
Video has 335,000 views now. On reviewing this video 5 years later I should not have pulled out the sparks quite so far onto the rod in my hand. You need to expect the spark can jump around an object up to 1/3 longer (or more rarely), which puts my arm just with in range.
For a big power arc it is less of a problem but if it “breaks” then there may be a problem.
I am a little older since then, perhaps not wiser, but still here…
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Magnetic sensor array
Photo Date: June 6, 2007
Pass a lot of high voltage DC current onto deionised water and you get remarkable colourful patterns at the water surface.
As the deionised water became conductive enough to sustain a higher current , the faint and feeble spark increased to a power arc to water of about 2 kV DC eventually to the point of making the wire red hot. The first 3 photos all show interesting variation in the surface effects. The green glow is the copper from a hotter arc.
A spark playing over a magnet submerged in deionised water.
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Photo Date: 2005, 2006, 2007
Sparks here jump directly onto the protective camera cage. and the wide angle lens captures most of the 7 foot spark on the right. The left spark jumps to an aluminum tube just a foot or two in front of the camera. It is a 6 second exposure.
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Photo Date: 2009
A spark should be a continuous line, jagged but without breaks. Right? So I thought too until you look closely at single sparks when you can see gaps.
The photos above show sparks from my ignition coil setup with perhaps 10 sparks per second. This single brief impulse means that there is not a second spark going down the heated channel of the first. You can see gaps in the spark channel which is viewed here end on and magnified. Sometimes there is a hazy glow in the gap but often not.
Here is another example with the magnified view. The left electrode is negative in this DC spark taken through my 300 kV diode so this is a negative side effect.
The photo above shows the Crooke’s space in a neon tube at reduced pressure. So there is a precedence for gaps in the spark channel.
Sparks don’t have uniform brightness as well which may be a related effect. About one third of the negative end of the spark is brighter as well. Although this is a spark from a coil it is being driven by a DC pulse and can be regarded as polarized.
I therefore suspect that this is a feature of the spark structure, presumably analogous to the Crooke’s spaces seen in lower pressure discharges. Since you often see this with Tesla coils maybe the discharge is polarized there too.
Above shows the bright area in the spark seen in a Tesla coil discharge. Generally seen when sparks are low power and purple rather than hot white. Sort of suggests that a Tesla coil sparks that only just connect are from a primarily positive discharge from the toroid.
The spark above is viewed in two directions at the same time using a mirror at 90 degrees angle. 3 of the 5 sparks have gaps and they are present in both views. The negative end is brighter as well.
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Photo Date: 2006
Rings of electrical power surround a mysterious figure. A other-worldly effect created with a Tesla coil attached to a rotating suspended rod.
The Sparks of Sauron. These are not “photoshopped” and are exactly what the computer sees on a long exposure. For these a Tesla coil is mounted 11 foot (3.3 m) in the air and thae rotating rod is attached to a long beam extended out above me.
Perhaps the aura of Sauron’s ladder? (I have to climb up this to turn the rotation motor on and off)
Above: Setup and testing. I wonder if I should have taught my kids CPR? In the 4th photo, note the elevated Tesla coil with the rotating connection above the ladder about 11 ft (3.3 m) off the ground.
My chain maille butchers glove is grounded both to the plate I am standing on (wet to improve conductivity), and to an earthed point nearby.
Next just add the Driza-Bone stockman’s riding coat, a hired dreadlocks wig, army surplus boots and you have the effect at the top. I am also wearing the chain mail glove and some cycling gloves over that so the sparks can jump onto my outstretched hand.
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Photo Date: Sept 2, 2007
A simple Franklin Bells set up using high voltage from an (old style) CRT TV screen.
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