Tag Archives: high voltage

Tesla Coil Rectification

Tesla coil rectification with sparks across the capacitor

Tesla coils produce high frequency AC which is passed through a diode and capacitor to produce DC. This Tesla coil rectification is a difficult task as very high voltage diodes capable of running at several hundred kHz are not easy to come by.
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Gallery-Media

Red Alert Tee

My wife was browsing Zazzle (as you do) and came across this tee shirt with my picture of the Red Alert Tesla coil on it. No I didn’t authorise it (but I bought it anyway).

Media

 

Tesladownunder on Australian TV
The site has attracted a lot of Australian media attention since 2008 and has now been on 9 TV news segments.
Australian TV coverage of Tesladownunder on this page includes:

Australia’s Got Talent,  Ch 7, 2011
GWN news, Ch 7, Dec 25 2010 – Worlds Brightest Bike lights.
WIN News Ch 9, Feb 21, 2009 – Xmas tree.
A Current Affair,  Ch 9,  Sept 21, 2009 – High voltage power lines.
Today Tonight, Ch 7, Jan 2009 – Tesla coil effects
Today Tonight, Ch 7, May 2009 – Modern Thinker
WIN News Ch 9, Dec 23, 2008. Australia and 16 other countries “Elec-trickery”
Ten News, Ch 10, 2009 – Cosmology Gallery Opening

Now this ABC video didn’t get to TV but was setup to do so.

http://vimeo.com/76846587

Sword swallowing

This is the GWN 7 TV news segment from the news site. Space Cowboy   tricks

 

Australia’s Got Talent Channel 7 Australia. 2011
Audience 1.7 million for episode 1. Here is a 7 second animation of the 2 minute act.

Australia's Got Talent
This is covered in separate pages with on and off air videos and Tesla coil setup details.

GWN news, Ch 7, December 25 2010.
This was about the World’s brightest bike light with Christmas theme.
The GWN version (was) here. The Channel 7 version was a different edit.

LED BIKE Xmas shoot wrap                               LED Bike Xmas shoot day

WIN News Ch 9, Feb 21, 2009 – Xmas tree. This news item was reported and filmed by Tiffany Wertheimer. Topic was the Xmas tree 2009. Filmed by Dean Lomax with video effects by Jordan. Video runs 1:18 mins.

A Current Affair,  Ch 9,  Sept 21, 2009 – High voltage power lines. By John Mort. Shown across Australia. The topic was a report on the medical risks posed by high voltage lines. My opinion was on the basis of my high voltage knowledge and as a medical specialist to interpret the extensive literature. Early studies had suggested a leukaemia risk but later much larger studies that actually measured fields showed no risk. I would have no concerns living under a power line (and in fact have done so when living near Hyde Park in Perth).
The Eastern States version is on video from the ACA website here. Video runs 4:13 mins

ACA John Mort 2009                                      ACA John Mort 2009ACA John Mort 2009
Today Tonight, Ch 7, Jan 2009 – Tesla coil effects. Reporter is Mark Gibson and it was shown across Australia. Link is here. Took 5 hours to shoot and runs for 5 minutes.

Dalek Cage                                     Sparks in the poolExploding steel wool
Today Tonight, Ch 7, May 2009 – Modern Thinker. Reporter is Graeme Butler from Today Tonight and it was shown across Australia. Topic was the Modern Thinker. Took 6 hours to shoot and video runs for 5 minutes.

                          
WIN News Ch 9, Dec 23, 2008.  ”Elec-trickery”. This 90 second clip was reported and filmed by Tiffany Wertheimer. Also screened on Channel 9 news and A Current Affair to give wide coverage in Australia. Elec-trickery eventually went international to 16 countries with an example being  MSNBC News in the USA .

           
Above, are a few pictures from the Win TV local shoot. The 5 kJ capacitor bank explosion of some steel wool and aluminium actually started 2 small grass fires which were caught on camera.

Ten News, Ch 10, 2009 – Cosmology Gallery Opening
The Cosmology Gallery Opening showed my pulse capacitor bank exploding some wire to simulate the Big Bang. Also showed the mini Tesla coil in action. It appeared on other channels as well.

Related pages
TV Overseas 

External links
A Current Affair

Try something else
Can Crushing 3

Photo Date: 2011

 

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Gallery-Big Projects

Sparks and sparkles. What's there not to like?

This gallery shows the best photos of my larger projects and links to the detailed topics with construction details. The one above is the “Modern Thinker” which is my interpretation of Rodin’s classic statue the “Thinker” using Tesla coil sparks onto me in a concealed protective suit. Jump to the Modern Thinker page.

The Eye of Sauron image is formed by Tesla coil high voltage streamers

This is a Tesla coil with high voltage sparks coming from the end of a rotating rod.  It looks dramatic in a long photographic exposure of 22 seconds. Jump to the Eye of Sauron page for the development of this photo which was the first one to really hit the media.

Make your car unpopular with burglars

The ultimate in car burglar protection, Tesla style. This is based on the “Sauron’s Eye” with a long photographic exposure of Tesla coil sparks from a rotating rod on top of the car. Jump to the Car Theft Protection page.

A real Red Alert style Tesla coil. A complex photo taken as a single exposure. yle Tesla coil. A complex photo taken as a single exposure.

Above, the recreation of the Tesla coil from the game Red Alert using a real Tesla coil. My most complicated photo. Jump to the Red Alert page here for the development and construction details.

LED Bike Full Standing Trees 1000

These are by far the world’s brightest LED bike lights and as best I can tell, for a while were the all time brightest bike lights of any type. Jump to the Worlds Brightest LED Bike Lights here.

Worlds brightest flashlight colours on lighthouse
The world’s brightest (multicoloured) flashlight shown above lighting a lighthouse. Jump to The Worlds Brightest LED Flashlight for details.

Related pages
Modern Thinker
Eye of Sauron
Car Theft Protection
Red Alert
Worlds Brightest LED Bike Lights
Worlds Brightest LED Flashlight

Gallery-Odd Projects

External links

Try something else
Media-TV Overseas

Photo Date: 2005 – 2009

 

Sparks and sparkles. What's there not to like?

The “Modern Thinker” above is my interpretation of Rodin’s classic statue the “Thinker”. It conveys the concept of the modern electrical age with the barrage of electrical interference in our lives. So much is happening and demanding our attention that it is difficult to “think”.

Believe that? Me neither. I just like making pretty spark photos….
This was arranged as an exclusive for Vice magazine who asked for a new project to feature.
By the way, no photoshopping anywhere on this site. It’s all what the camera sees.
This is my interpretation of Rodin’s classic sculpture, the “Thinker”. Topics include:


Background

Thinker

The original sculpture of the Thinker was by Rodin started in 1879. I wanted to convey the concept of the modern electrical age with the barrage of electrical interference in our lives. So much is happening and demanding our attention that it is difficult to “think”.
I decided upon a real life posture like the Thinker with a lot of electrical activity around me with sparks onto my body.
I wanted to do something new that also challenged the boundaries and that is new to the internet. I used my established techniques of long exposures and a moving rod trailing sparks with an “eye of Sauron” effect. The aim was to have a semicircle of sparks over my body while in the “Thinker” pose.


Mechanical and High Voltage Setup

MTsideViewTCarm

Above shows how the output of my 4 inch diameter Tesla coil is directed by a rod so that it can spark onto me sitting on a chair.

MTHRSparksUncovered1000 MTHRStreamers1000 MTHRSparksFlames1000

Above in the left photo you can see sparks onto a wire frame. In the center photo the voltage is cranked up giving large streamers. The right photo shows some early attempts at a mechanical linkage with part of it burning up which is the orange glow.

MTFoldachair1MTFoldachair2MTFoldachair3

Above is a sequence of 3 photos to show the effect of the mechanical linkage to direct the sparks around the body. I am not next to the sparks, this is a long exposure with an initial flash of me in the chair. I then get up and run away and the Tesla coil is turned on. It simulates a double exposure to demonstrate the position.

MTRotArmWireBanjo MTDayRunThreeQuarters

Above the left photo shows a long exposure of the sparks above forming a (sort of) semicircular ring of sparks around the chair where I would sit. Very untidy but a better linkage in the right photo demonstrates the principle better. The frame is just to simulate my height and seating position.

MTsideViewTCarmOperatorClose MTsideViewTCarmOperatorCenter MTsideViewTCarmOperator

Here is how an operator will direct the arm in a semicircle. “It ain’t fancy but it’s chee-eep”. A black backdrop has been added.


The Face Mask

Allowing the sparks to contact my body or face directly is not safe of course. A single spark that gets past the defenses would throw me to the ground in intense pain like a Taser shock. Multiple sparks would also stop me breathing and be fatal eventually. Hopefully my loving wife at the controls would turn off power before then.
Sparks in close proximity to a body are impressive. I have used a Faraday cage before (the popular Dalek cage) but I wanted something more direct. Sparks need to contact metal and not my skin. They also must have a continuous path to ground preferably a broad one with no joins or potentials for failure to prevent any voltage drop developing and causing a shock.
I considered a number of options. I tried copper foil and made a mask and headgear of this which was effective and safe but crinkly and not cosmetic. It worked though and high voltage to my head was not noticeable.

MTheadMould MTmaskWigICsparks MTmaskWigICPoseDay

Above the rather stiff and fragile copper foil doesn’t mould to a head shape well. It does make the sparks safe but looks like a horror mask. Long aluminum straps go from the mask to ground level. Let’s try something better.

MTFacemask

Above the fine wire mask which is based on the simpler version that I used successfully in the pool. It uses very fine strands of stainless steel wire. It is designed for safety and minimal facial coverage. This will be joined to the suit.


The Safety Suit

MTmultiplefabrics MTblackMetalFabricSparks

Above I did try various metallic cloths without success when subjected to spark testing. Despite having metallic looking thread they are poor conductors.

MTAlfoilArm MTAlfoilStockingArm MTArmICsparks

Above shows my hand covered with foil and a stocking and does seem to take sparks without problems. I eventually settled on builders insulating foil. This is a foil backed by fibreglass and plastic and is thin but strong enough for me not to be able to tear it by hand.

MTFirstFoilSuitShotSingle MTFirstFoilSuitShots

Above shows me simply wrapped up in the builders foil. First with tentative low power then higher power prolonged shots. No sensation or discomfort at all. So the concept seems to work. Now just need to make a better suit.

MTsuitArms600 MTsuitArmsLegs600 MTsuitWig600

Above shows different stages . The arms and shoulders were not bonded to the main suit but were in good contact with the body aver a wide area. The wig is not ideal and really needs a haircut. I couldn’t light it with sparks so fire risk seems low. The hands look a bit artificial but everything else is safely covered.

SilversuitWornuncovered SilversuitWornCovered

SilversuitInsideShowingHoles.pg

Above shows a later tidier suit which is a (sort of) fitted with a zip up front. Much easier to get in and out of so gets more than just one use like the old one which had the silver surface ruined by the tape. It has lost a lot of the silver when you look at the inside but most of the silver squares are still joined at one point. OK for this TC but not the larger one I suspect. Still very hot to wear. This was not the one used for the pictures below though.

So time to get setup.

MTmichael MTHRseated1000 MTloadingSparklers

Above in the left photo is my son Michael (previously seen clapping smoke rings and sitting in the TC on the car) who is controlling the linkage. In the center photo I am setting up the sidelighting. In the right photo, Jane sets a sparkler.

MTFaceFrontClose

MTHRpentagramKnee

Above in the left photo you can see sparks to the fine wires of the mask while I “think”. In the right photo I thought it looked better to get a sparkler in the picture attached to the tip of the sparking rod. Sparks strike my knee without sensation.

Now time for some shooting.


The Thinker and Variations

MTHRnoSparkler1000 MTArcsEnlarged

Above, you can see sparks the effect I intended as well as a close-up of the sparks.

MTSparklerOnly1000 MTHRcandles1000

Above in the left photo you can see the effect of just placing a sparkler on the end of the rod to add more color and action. Throwing a few tea light candles in helps as well. My face is rather obscured by the sparks though.

MTHRpentagramFaceForward1000 MTfootArcs

Above in the left photo you can see some fluoro tubes which light up themselves with tea light candles at the ends of them. It is a better photo as the face is not obscured. The pentagram of lights seems to be an awfully mixed metaphor. The right photo is one of my favourites and shows sparks from my foot onto the ground.

MTShoeBurn

If you play with high voltage, make sure your rubber shoes don’t have holes… This was getting uncomfortable hot and I had to wriggle my toes which causes some foot motion blur.

Media

This photo in the media 2009
Generated 50,000 hits to my site in 1 week.
Featured in 60 sites (look for Modern Thinker note on the sites listed in Backwards links). Popular in UK and Australia.
On TV (Today Tonight May 4 2009)
In print with details on Media page
Guardian (UK newspaper) ran it as their centrefold on 23/4/09.
The Independent (UK newspaper) had a picture on 23/4/09.
The West Australian (Australian newspaper).
6 online newspapers had features including Daily Mail, Telegraph, Sydney Morning Herald and the Age.
Magazines including VICE magazine, Zoo magazine, BZ magazine and Nuts have printed articles.
One might speculate that with well over 1 million views that it may have been seen by more people than say Rodin’s original in his lifetime. (1 million people = 100 per day for 30 years). His sculpture became more popular decades after his death. Of course this might just be a reflection of the pervasiveness of the current media rather than my artistic ability.

Electric Piano

Dr Electric plays piano on Nikola Tesla's Birthday

Dr Electric plays Happy Birthday for Nikola Tesla with, of course, a Tesla coil and a piano.

Michael plays piano
Michael demonstrates a new meaning for electric piano.

Let’s look at the setup.  First take a common or garden variety Tesla coil…

Setting up the TC

Place it on large driveway. Add ladder and cage. Be sure you understand that one you stay in, one you stay up and the other you stay back from.

Setting up with piano and TC

Add a piano then add subtle electrical protection to protect the fine wood from sparks.

Rain threatens

Hastily cover up when rain threatens. But under every rainbow is… ( sometimes a Tesla coil).

An unmanned test flight.

Unmanned test shot

Now, care for a seat?

Michael and some sparks

Michael is not at all worried by his first time in the cage – yeah right.

The piano was untouched. It was covered by a fine metal mesh which was earthed, along with the frame of the piano. Also not seen are very fine wires taped in unseen areas to catch errant sparks. These are pointed towards the camera to make them even harder to see. It is still sitting on the dolly we used to get it out of the house.
This setup was a piece of cake compared with putting the piano in the middle of a grassy field for one of my Michael’s piano improvisations a few weeks ago.

Related pages

External links
Google+ post (mine)

Try something else
Jacob’s Ladder 

Photo Date: July 11, 2012

 

Ionic Spinners – Briefcase Tesla Coil

Briefcase Tesla coil with neon lights attached to ionic spinner

This is a long exposure of an ionic spinner with green and blue “neon” fluoro pilot lights rotating on my mini Tesla coil. It  shows the corona which is the purple ring of air ionised by high voltage that drives it.
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