Introduction: Jiffycoil's Tesla Coil Projects

Picture of Jiffycoil's Tesla Coil Projects

I'm new here and I love the high voltage projects that have been put into Instructables format. My passion is building Tesla coils and I wanted to share images of the Tesla coils I have completed. I 'm planning to post Instructables for my future Tesla Coils so watch for them here.


EmilioA17 (author)2017-01-05

Great work! could you help me out with the specs for the middle sized wooden box one? Thanks!

jiffycoil (author)EmilioA172017-01-05

Feel free to ask the questions you have.

EmilioA17 (author)jiffycoil2017-01-05

Thanks, theres not really an exact question but what did you use, whats the transformer size and all?

jiffycoil (author)EmilioA172017-01-06

I used a 10kv 23ma oil burner transformer for that build.

EmilioA17 (author)jiffycoil2017-01-09

great, what are the specs of the other components? adn what is the two bars at the middle? Thanks man!

MichaelS522 (author)2016-07-10

Beautiful work! All very neat and symmetrical. I'm sure that Nicola would approve of it! :-)

jiffycoil (author)MichaelS5222017-01-05

Sorry for not replying sooner. Thanks so much.

javiercrodriguez (author)2016-02-04

so I have been wanting to build a tesla coil for quite a wile it seems that a finally have time to go at it. I have been reading questions from some people regarding the construction process you have said that the coil should be designed around the transformer. so my question is I have found some Transco 5000 v and 6000v will these work to build a coil.

As long as the transformer is Non-GFI then it will be fine for a medium size Tesla coil. The transformer should say if it is GFI or not. If it has green red and yellow LEDs on them then they are GFI and will not work for Tesla coils. GFI are put on transformers to protect them in case of short circuit. The way Tesla coils work would tell a GFI protected transformer that there is a short circuit and shut the transformer down. I hope this helps.

FinnyT (author)jiffycoil2016-06-24

What type of capasitor should i used for my 20volt tesla .? Pleas tell me.

MaryM22 (author)2015-12-14

I have been fascinated with Tesla Coils since my first day of college and now I want to make 5 small versions and program them to music. I have done much research but none as small as yours I have found. I would love a mentor in this adventure of knowledge.

jiffycoil (author)MaryM222015-12-14

Hi, I haven't been to this site in quite sometime. I would be glad to help in any way I can. Are you familiar with solid-state Tesla coils? You will need to make your coils solid-state for them to output audio. Please feel free to ask any questions you may have.

AbidH2 (author)2015-07-31


TANN-MANN (author)2015-03-25

Hi JiffyCoil,

Amazing artistic and beautiful coils. I'm extremely interested in your bipolar coil and would love to adapt your design for my classroom.

I have a couple questions
Any chance of a labeled picture or a component list?
The ceramic insulators on the ends of the secondary, where can I find some similar?

Again, beautiful work!


bjorn.sjoling (author)2015-03-07


Another newbie to coils, I need to make one particularly compact as ultimately it will be enclosed, so the tetrahedron looks especially interesting. I have good facilities, but little time so I need to know that my efforts will work. How ready are you to post more instructables? Are any drafts available?


kdomjan (author)2014-10-06

This is one of the best Tesla Coil I have ever seen in my life!!!

Love it !!

jiffycoil (author)2014-06-04

Hey Adam,
Ill be glad to help when you are ready. When you have the transformer specs I'll help you determine the overall coil specifications. Good luck with your new home.


amikolajczyk (author)2014-06-03

These are some beautiful coils, quite inspiring. Building a small-ish coil has always been on my list of must-do's. I know there are lots of resources out there but you seem to have it figured out. Can you point an aspiring coiler toward a reasonably attainable telsa coil how-to that might be worth tackling as a first timer? Thanks!

jiffycoil (author)amikolajczyk2014-06-03

Thanks so much. The small coils can certainly have amazing output. The key to this is building a well engineered coil. Do you have access to small neon transformers or oil burner transformers? Where are you located? The key is to build around the transformer. If you can obtain the transformer then there will be no problem getting everything else. You can build around 3 kV 8mA transformers but finding a 10kV 23mA oil burner transformer would be best for a great small Tesla coil. eBay is a great place to look. I find old non solid state oil burner transformers from local heating and air conditioning companies. Let me know where you live and I'll see if I can help you find the transformer. Once you have that I will be glad to guide you the rest of the way.
Cheers, Michael

amikolajczyk (author)jiffycoil2014-06-04

Thanks @jiffycoil, I do have a transformer I picked up for free some years ago with this exact application in-mind. I just moved from central NY to west-central PA though and much of my stuff is in boxes. I'll definitely dig it up here soon and post back the specs. Fair warning, it may be a little while, we're starting to build a house here soon, and only in temporary diggs for a bit, so my "workshop" space is going to be severely limited for a bit, but now that I'm motivated, I'll definitely circle back to this. First things first, next time I'm in our storage unit, I'll try to dig up the xfrmr and see if we can't start thinking about a shopping list. Thanks again, much appreciated!

Kind Regards,

JasjotSingh (author)2013-07-11


MadGuitarist (author)2013-05-06

your coils are awesome man

MadGuitarist (author)2013-05-06

your coils are awesome man

TheDivineImpulse (author)2013-02-02

do you think the philips BHL 250 is suitable for a tesla coil project?

I looked at the transformer and it really isn't suited for Tesla coils. You need a transformer that runs on household 110v and produces 3000 to 15000 volts. I would check with a local neon sign company and see if they have any old neon sign transformers that they would sell you.

Good luck and I hope you build a coil.

:)) i live in europe sadly , here we have household 750v 3 phase :) so i can get 500 betwen phases and 220-250 betwen phase an ground i think i will go and make my own trasformer i think its the only way i can do this here...

MadGuitarist (author)2013-01-20

awesome coils dude do u have an idea to how to make a tesla coil with aa batteries,oscillator circuit ,and a flyback transformer as a NST?

The Asian Cow (author)2009-12-30

Ok, my friend and I have just finished our tesla coil using a 9kv NST and 6 salt water capacitors but it isn't working. If any of you have any idea why it is not wotking please let me know.

Glenn781 (author)The Asian Cow2010-01-01

 do you have pics of you coil asian cow?

The Asian Cow (author)Glenn7812010-01-04

jiffycoil (author)The Asian Cow2010-01-15

 Hey Asian Cow did you get this setup working? The photos you sent make it hard to see the wiring setup you used. One problem I can see from the photos is wiring to the primary. Its long and the gauge of wire is too small. Wire the section from you mains to the OBIT with regular mains type wire. From the OBIT to the spark gap should be High Voltage rated wire and from the spark gap to the Primary use battery lead type wire 8mm or so. You will not get proper transfer of energy unless you do this. One other question , when you fire up your coil are you getting good spark in the spark gap?

The Asian Cow (author)jiffycoil2010-02-01

Ok, our tesla coil is still not working and I have stopped working on it for now. But to answer your question, yes, the spark gap is emitting a very loud and blue spark in the spark gap but absolutley nothing is coming from the top load. We used 1/4 inch copper tubing for our primary.

jiffycoil (author)The Asian Cow2010-02-01

Hey Asian Cow,
You have made many changes. Without drawing the wiring diagram out for you go to this page if you have yet to do so and see if what you have as far as wiring matches up. You want to follow the wire size also or as close as possible. If all this is right then your problem is more than likely you capacitors. Even in the worst case scenario most coils that are wired right and have a good capacitor will put out something. take off the top load and see if you get any plasma. Also try bringing a metal object to the secondary lead at the top of the coil using an insulated rod like PVC or plastic. If its resonating at all it should give you a spark. If you still have no output try testing your capacitors just using the transformer and spark gap. Run the spark gap with just the transformer first and take note as to how the spark looks and sounds. Next wire the capacitors in with the gap and transformer and fire it up. The sparks look and sound are totally different when all is working properly. 

Give that a try.

The Asian Cow (author)jiffycoil2010-02-10

Ok I have visited but they only give informtaion on helix and flat primarys (or at least thats all I could find). The capacitors work. They create a much louder and brighter spark when hooked up to the spark gap then with just the transformer. We have also tried taking off the top load and placing a metal rod next to it but as you can see, even in the dark no spark is visible. 

Did you ever get this coil working? I just built a spark gap tesla coil running on a 9kv transformer myself, and could probably help troubleshoot.

I know why. your caps use water bottles right? they don't have a very high voltage rating and will work very badly. So just spend $15 and get a real cap and your tesla coil will work great.

jiffycoil (author)The Asian Cow2009-12-31

 I need to see the layout of your system. 

Jimmy Proton (author)2012-01-02

how many feet of tubing did you use to make the primary on the first coil?

BeanahVulgaris (author)2010-01-09

Question for Jiffy or any other Tesla coil experimenters. Has anyone ever hooked a coaxial lead of a function generator to a tesla coil for radio broadcasting?

jiffycoil (author)BeanahVulgaris2010-01-15

 I regularly sweep my coils with a function generator to find at what MHz they resonate at. I'm afraid the output from the generator wouldn't do much other than give a reading to an oscilloscope. 

BeanahVulgaris (author)jiffycoil2010-01-15

isnt it possible to make a tesla coil for any frequency?

im trying to work through a book to figure out how to get a coil with a resonant frequency of around 7. 85hz. It would be interesting to

1, get a coil to resonate at this frequency, and 2, drive it with a modulated signal and see if you can get a second tesla coil to pick up the signal by 1 of 2 ways... 

1, just passivley picking it up and amplifying it.
2, On the second tesla coil, putting a loosely coupled inverted signal on the antenna which makes the electric field vectors add together (cause if you blow a ball from a super powerfull vaccume in my direction and i use a vaccume to suck the air around me in, the ball will drift my way)

If they are in resonance i believe that it will make an electrostatic circuit, if you increase the frequency then the air becomes like a dielectric, whos resistance to power flow is reduced as the frequency increases.

this could be seen as a form of quantum tunneling i guess.... i feel there are more classical theory explinations.

anyways, im poor and going through school at the moment, so unless i get a grant, or hit the lottery i wont be able to test these things till some ones allready tested and invented the darn thing so... lol...

anyways i was just wondering what you thought, or have tried with the coil.

jiffycoil (author)BeanahVulgaris2010-01-15

 It sounds like you need a grant to conduct your experiments. It's funny you said 7.85 MHz because I've been studing shortwave radio and I think CHU which is a time signal radio station out of Canada is on that frequency. This type of experimentation is not in my field of expertise but you may want to check out this site the folks there are doing lots of research in this area.

BeanahVulgaris (author)jiffycoil2010-01-15

lol... no 7.85 hz very long wave. At that frequency, theres an electric field that engulves the earth in a resonant mode thats some what like what happens when a jump rope is swung up and down in it's first resonant mode (the antinode basically engulves the earth. I think it would allow a piece of circuitry in the earth to link electrostatically with the earth's electric characteristics.

a 7.85 hz teslla would be around 900 feet tall!!!!!!!!!!!!!!!!!!!

HVahead (author)electricfan2011-09-21

kinda like this?

HVahead (author)electricfan2011-09-21 kinda like this...

and as for high frequency..... think resonant vibrations with atoms and molecules rather than electromagnetism coupled with no mass.... so something in the terrahertz range or higher?

ps. i forgot to mention the 2 modes (at one point i say low frequency and at another i say high).... i think a high frequency coil would be good to transfer power between two oscillating coils, but low frequency would be the way to get energy thats injected into the earth's upper atmosphere by solar winds etc.

also ps.

your coils and experiments are beautifully done, setup , and displayed!
i love your designs!

chriskarr (author)BeanahVulgaris2010-01-10

First, doing so would inhibit resonance.

Second, doing so would make the circuitry heat up, due to increased average current pull.

Third, if hooked to a Tesla coil, a function generator would die.

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