All posts by EEadmin

Gaussfest Teslathon 2013

Gaussfest 2013


Phill Tuck and Phil Strauss Arrive
Phill Tuck and Phil Strauss Arrive
Dave's Tesla Coil
Dave Assembles his Tesla Coil
Dave's Tesla Coil
Dave'sTesla Coil
Dave's Tesla Coil
Dave'sTesla Coil
Dave's Tesla Coil
Dave'sTesla Coil Rectifier and Balast
Dave's Tesla Coil
Dave'sTesla Coil MOT Stack
Dave's Tesla Coil
Dave'sTesla Coil Controler
Derek's Tesla Coils
Derek's Tesla Coils
Derek's Tesla Coils
The Aetheriser destroys a CD
Derek's Tesla Coils
Noah II Produces a streamer
Derek's Tesla Coils
Noah II Produces a streamer
Derek's Tesla Coils
Magnetic Levitation
Jase's Tesla Coil
Jase's Tesla Coil
Jase's Tesla Coil
Jase's Tesla Coil with a Rotary
Jase's Tesla Coil
Jase's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil
Phillip Strauss's Tesla Coil Tuning
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Fisrt Break down
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Fixed by removing a chunk of tufnall
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil returns to service
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Arcs to Phillip S's
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Smoke !!!
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil More Burnt Tufnall
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil More Burnt, Hot Tufnall
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Runs again
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Arcs to the floor
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Failure II
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil After more tufnall removed
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil After more tufnall removed
Phil Tuck Tesla Coil
Phil Tuck's Tesla Coil Result of earth free running
Wireless transmission
Martyn's solid state magnifying transmitters
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Tesla Coil
Sam's Plasma Ball

Cambridge Teslathon 2013

Alexes Ignition Coil
Alexes Ignition Coil
Alexes Tesla coils
Tesla 1 kit
Alexes Tesla coils
Ran for a while and died...
Alexes Tesla coils
Ignition Coil
Daves Tesla Coil
Daves Tesla coil control box
Daves Tesla Coil
Daves Tesla coil
Daves Jacobs Ladder
Daves Jacobs Ladder
Daves Tesla Coil
Daves Tesla Coil
Daves Tesla Coil
Daves Tesla Coil
Dereks CWM
Dereks CWM
Dereks Tesla Coils
Dereks V8 tesla engine and tesla coil
Dereks Tesla Coils
Dereks arc of time - Tesla Clock
Dereks Tesla Coils
Dereks arc of time - Tesla Clock
Dereks Tesla Coils
Dereks V8 Tesla Engine Explodes
Dereks Tesla Coils
Spraying the desk and evrything in a 2M radius
Dereks Tesla Coils
It ran on 7 coils - until it blew again.
Dereks Tesla Coils
The Aetheriser entertains
Ian's Tesla coils
Ian's small SG Tesla coil
Ian's Tesla coils
Ian's small SG Tesla coil - sparks
Phil Strauss's Tesla Coil
Phil Strauss's Tesla Coil
Ian's Ignition coil
Ian's Ignition coil
Ian's Ignition coil
Ian's Ignition coil
Ian's wimshurst
Ian's wimshurst
Ian's ignition coil
Ian's ignition coil
Phil Strauss
Phils Tesla coil
Phil Strauss
Phil goes fishing
Phil Strauss
Phil goes fishing
Phil Strauss Tesla coil
Phils Tesla Coil
Phil Strauss Tesla coil
Phils Tesla Coil
Phil Strauss Tesla coil
Phil Goes fishing again
Phil Strauss Tesla coil
Phil Strauss Adds more caps
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs to the roof
Phil Strauss Tesla coil
Phil Strauss tesla coil arcs to anything near by
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Strauss Tesla coil
Phil Strauss tesla coil more arcs
Phil Tuck's Tesla coil
Phil Tucks tesla coil
Phil Tuck's Tesla coil
Phil Tucks tesla coil gave a great performance
Phil Tuck's Tesla coil
until its rotary motor died
Phil Tuck's Tesla coil
Gives some great Arcs
Phil Tuck's Tesla coil
Gives some great Arcs
Phil Tuck's Tesla coil
Gives some great Arcs
Phil Tuck's Tesla coil
Gives some great Arcs
Phil Tuck's Tesla coil
Phil Tuck fishing again

Cambridge Teslathon 2014

Thanks to all of the coilers and visitors to this years teslathon and of course a great thank you to the Cambridge museum of technology for hosting us again.

My Coils & Stuff

More Photos from the EMPi

Phil S’s Coil

Phil T’s Coil

Alex’s Coils

Marks Coil

Anders’s Coil and Gessler Tubes

Dave B’s Coil

John’s Coils and Equipment

Steves DRSSTC

Then Steve’s coil opened up a rift in the Aether and we were all sucked in. Back next year.

Img20141026_13269

 

 

 

 

 

 

 

 

 

 

 

Next years event?

How do tesla coils make music

I have been asked this question so many time I thought I aught to write down the answer.

Musical tesla coils are fairly common now and there are many videos of them working, but what causes the noise.

So lets start with the basics. Most electronic tesla coils don’t run continuously (Ill come back to CW coils later). To maintain a large spark output current in the primary circuit is key, to get the best out of the components the coils are driven for short periods of time, at high currents, quite often exceeding the continuous rating of the drivers. During this short ‘on’ period, power is stored as in the primary and secondary coil. As soon as the power is turned off the stored energy is transformed into a high voltage high frequency pulse. It is this pulse that you see as the discharge from the top of the coil.

Creating hot plasma in the atmosphere has an effect, the air heats up to thousands of degrees C in a microsecond or so. This expanding air causes a sound wave that you hear as a click. (or a bang with real lightning, its just a matter of scale.)

So, if you repeat this process at say 440 times a second, you will hear an audio tone at middle C

Music can be played by controlling the length and frequency of the pulses you send to the coil. With these coils getting the frequency and length information is relatively simple from a MIDI audio source via a suitably programmed microprocessor.

Due to the pulsed nature of the coil real audio (e.g speech,singing etc) cannot be rendered.

OK, I mentioned CW (Constant or Carrier wave) Tesla coils
With CW coils the power isn’t interrupted they are driven constantly. Their output is essentially silent (You do get a hiss at lower frequencies due to variations in the spark output). To get music from these coils you vary the power going in to them in a very similar way to an AM radio transmitter. There is two ways of achieving this.
1) You control the voltage to the driver therefor controlling the power
2) You vary the frequency of the drive (FM modulation), The tuned circuit formed by the secondary gives maximum output only at the central frequency, so the effective output power is varied as the frequency is varied.

As the power is continuous, you can’t gain any power advantage by short pulses and neither do you get the voltage gain by the release of the stored power in the secondary so the sparks are smaller than a pulsed coil.

But, you can render speech, singing and any instrument can be played due to the almost radio style modulation. Plasma speakers are made using this technique.

Tesla Coil Tuner

First light of a Tesla Coil tuner.

Old TC TunerSo I needed to get a better Tesla coil Tuner. I have been using this NE555 pinger for 10+ years.

Always said I’d put it in a box.. Never happened…

With some of the tuning problems I’ve had recently I needed a better solution.

So..

 

 

 

 

 

PIC powered USB controlled Tesla Coil Tuner using AD9850 DDS Frequency Synthesis.

Built on a PIC low pin count, USB development board (hence redundant RS232 connector)

Direct connectiontctuner to the Primary Coil with current measuring.

Three ways of measuring.

Primary and cap on its own(Secondary removed)

Secondary on its own (driven by primary with no Primary cap)

Primary Cap and Secondary (across spark gap) – Should see both current dips.

 

Tesla Coil Tuner - sec only

First plot of a small Secondary coil, using VB to drive the USB.

Plots at ~15 seconds for 1000 points (e.g will scan from 500Khz to 1.5Mhz in 1khz steps in ~15 seconds.)

 

Range 50Khz to 4Mhz (with some droop at each end)

I’m having some issues getting a plot with just a primary coil, not sure why at the moment. Also my driver (tc428) is damaged, its not driving correctly to ground. Which may be causing me some issues. But not bad for a first go.

More developments

Added an Ariel input (B)

Improved the display, and removed a whole load of noise on the traces.

Also, added the ability to take snapshots of the traces (pale colours) so you can see any change from scan to scan

Tesla Coil Tuner - sec-pri
This shows a current scan in Dark blue, with a snapshot in light blue and the Ariel input in dark green with a light green snapshot. The current scan was done with my hand near the topload hence the lower resonant frequencies.

This clearly shows the primary (C & L) as a large dip on the left and the secondary / topload as the smaller dip on the right. I’m feeding the primary coil and primary cap in parallel as this gives the best indication of the current change in the primary.  For some reason driving the coil with Cpri in series shows a lumped resonance (or doesn’t show the primary resonance up at all)

Stand on Tesla coil

Img20130914_10305

 [shortlink url=”http://tinyurl.com/msd4o8v” title=”Continued From V8 Tesla Engine”]

After playing with the V8 Tesla engine I realised that I could build a stand on tesla coil. The lack of mains power could make this “fairly” safe.

So I started with a topload that was big enough and strong enough to stand on. I started with a pair of 110mm PVC tubes and joined them together. The thought was to make an oval tesla coil (big mistake).

After winding the secondary, by hand (1000T of 0.33mm wire ) on to the former I started to realise that there was a problem, the wire stretched slightly and started to sag between the two tubes. To give the wire some support I wound PVC tape around the coils as I completed them. This was partially successful, but as I had nothing to loose so I continued.

IMAG0317

The Topload needed to be strong enough to

stand on too and smooth and an oval.

So I started with an MDF former of 3 oval sheets spaced to a total height of 2.5″, and an external wrap of pipe lagging to give the external shape.

Over this I added paper mache and then a covering of plaster and PVA glue to give it strength. This last layer could be sanded to smooth out the edges.

Img20130914_10302The Primary, I quickly roughed out from 50′ of 5mm break pipe held in an oval spiral with cable ties and adhesive.

The output from the V8 tesla engine is fed into a primary cap and an crude sparkgap.

 

 

 

 

Img20140301_11421

Here is the coil working at the Nottingham Gaussfest.

Note that the problems with the secondary coil are starting to show with a breakout at the bottom.

But it was worth having a go at standing out the coil. After a while I found that the tuning point changed only a single turn when I was standing on the coil.

Below is a video of the first run with me on top.

So I realised that the secondary needed to be re-built The pictures below show the damage.20140305_194312

20140305_194331
20140305_194348

 

 

 

 

 

So the rebuild begins

Img_20140406_1123

This time I’ve packed out the space with some cardboard  in the void between the PVC pipes and sheets under the coil bridging the two pipes. The cardboard is held in place with many layers of adhesive craft paper that was varnished before the wire was wound on.

The finished article looks a load better then the old one, but there is still some minor ‘droopage’ between turns. So the coil was heavily varnished after winding.

Hopefully it will not suffer the same breakouts as the old.

 

Also I decided to clean and re-mount the sparkgap the old copper pipe gaps were a little? corroded.

The Sparkgap is mounted on to a channelled acrlyic chamber that allows a high volume fan to blow air over the gaps for cooling and more importantly  spark quenching.

20140208_163246 20140215_154730

 

 

 

 

 

Better results from the new coil

Finally, Power from a tesla coil – Free energy?

2004_0728_210053aI have been tesla coiling for over 14 years now, and I have always believed that there was no way that a tesla coil could produce more power out than was applied in. Of course there are many stories of Tesla himself creating a power system from tesla coils, but these mainly refer to his “World Power System” which was a method of distributing power, not creating it.

Recently I have been experimenting with car ignition coils to create the high voltage required for the input to a tesla coil and have had great success with this for a number of small coils.

Whilst playing with this system, I noticed a strange phenomenon. If the ignition coil was close to the primary of the tesla coil some of the large current circulating in the primary would be induced back into the ignition coil, I could even draw spark from an unpowered coil near the working tesla 2003_0906_110312AAacoil.

Thinking about this further I decided to put the ignition coil upside down into the secondary of the tesla coil and draw out the HV lead out and feed back into the spark gap and the unmodified primary coil / capacitor of the tesla coil. If I gave this circuit a high voltage pulse to start it, the tesla coil would power its-self for periods of up to a second.

Obviously2003_0923_220336AA I needed to reduce the losses in the coil to maintain the process.

After much playing, I can now get the tesla coil to run for fractions of a year with no extra input and with instantaneous outputs in the region of millions of Ergs per second.

One drawback to this process is any tools in the vicinity acquire a blue glow which is really difficult to remove , they also give a nasty spark when you touch them.Img20081121-214320aa

But, this important thing is, can I extract any useful power from this arrangement?

Looking in to this I attached a common kettle and unfortunately found that the device won’t power it efficiently due to the differences in the voltages needed compared to the high voltages generated , but I have used the coil to create heat directly creating temperatures of thousands of degrees C, well in excess of the temperature required to boil water, and that could be used to power a steam turbine.

For now I will be keeping this power source’s exact details a closely guarded secret, as I would like to make millions from it, not just run my house. My prototype is happily powering my LCD clock and has been for a number of days, although I do need to clean the electrodes from time to time to maintain this level of power, so far I haven’t found a non-corrosive element better than lemon juice to keep them clean.

Img_20130615_771

Next is to scale up the process.

Unfortunately I can’t get larger ignition coils, but I can get multiple tesla coils, and I’m starting to build a system with 8 coils. At present I can get about 300W at 10KV with this system, although it is being driven at 24V at present.

But to be able to draw 10KV from the machine is a great step up from only 24V. 10KV is not far from the voltage(14.4kv) used in small power transmission systems that power small industrial parks, not bad from a couple of small 12V batteries.

For more details, take a look at the V8 telsa engine http://www.extremeelectronics.co.uk/other/V8TeslaEngine/

 

The Crossness Engines Sewage Metropolis Steampunk Convivial

EE and a couple of other UK tesla coilers will be providing some Tesla coil entertainment for the

The Crossness Engines Sewage Metropolis Steampunk Convivial on the 28th of September.

crossness C

Details below. – Tickets from Event Brite

More details convivposter (PDF)


Come and join us for

– Electrifying Tesla Coil demonstrations in the Eastern Engine Room~
Trader’s market
– Exhibitors
– Tea duelling
– Umbrella fencing
– Shark racing
– Costume appreciation
– Promenading
– Finest music from Tom Slatter

and a multitude of other eccentric escapades!:

April 1865Cness logo

The culmination of the great Metropolitan Board of Works’ epic civil engineering project devised and led by Sir Joseph Bazelgette. The Crossness Pumping Station is a lasting testament to the genius, craftmanship and foresight of the great Victorian engineers and notables. A gargantuan project that saved London from disease and decline, the benefits of which we still enjoy today.

Experience this magnificent 150 year old building with its 1,000 tons of cutting edge Victorian construction hailed in its day as a modern wonder of science and engineering. Decorated in the highest of Victorian design the architecture of the building is a feast for the eyes. The multi coloured wrought iron interior is both beautiful and practical.

A hidden gem in the hinterland of Erith & Thamesmead, it is rightfully described as the ‘Cathedral of the Marshes’. This is a rare chance to experience this beautifully restored Grade 1 building and grounds.

Enjoy our facilities: a lovely cafeteria, modern toilets, wheelchair access to the Visitor Centre and Engine House floor.

Ample parking with disabled spaces. Riverside walk. Wildlife Garden and a treasure trove of old engines.

Tickets from Event Brite

Nottingham Tesla Workshop 2003

The Nottingham Teslathon Workshop took place on September 6 2003. The idea of this event was to focus on technical investigation and tinkering around with coils, rather than running demos. It went very well. The highlight was possibly Mike and Brian’s mighty magnifier which produced bigger sparks than ever before, thanks to some careful tuning assistance, and the loan of a series compound rotary gap, from Martin Dale. However, there were plenty of other excellent coils doing the sparky thing, mostly due to Phil Parry, Derek Woodroffe, and Paul Benham.

There may possibly be a repeat sometime in February or March. The working title for this event is (probably) now the “Nottingham Gaussfest”, since it’s 1/10,000 the size of a normal Teslathon :-6

 
32″ Arc from Arian Fretwells
Coil


Phil Parrys VTTC heats
up the room


Brian and Mikes
“Maggie” Tesla Magnifier


Maggie Bites
back


Maggies Primary Arcs
over, one for the Smokin’ page !!

Cotton Tess doing its
cooker ring impression.

Adrian Fretwell’s Coil
hits a lump of Wire wool.

My Big Tess giving 2′
streamers 

Phil Parrys VTTC
collection

Adrian Fretwells
Coil

Paul Benhams
Coil

Small Car Ignition
Powered Tesla Coil

A View of all of
“Maggie”

Maggie running with
Martin Dales Rotory Gap at 15A

A PC Motherboard is
tested for static immunity.


Paul Benhams coil runs
with a Rotory and beer glass insulators.


Phill parrys VTTC
lights up some assorted glassware.

Adrian and Phill light
various tubes from Ikletess via
themselves.