Step 5: Build the Capacitors

I decided to go the cheaper route and build a capacitor. The simplest way is to make a salt water capacitor, using salt water, oil and aluminum foil. Wrap the bottle in foil, and fill it with water. Try to get equal amounts of water in each bottle, as it helps to keep the power output stable. The maximum amount of salt you can put in the water is .359 g/mL, but this ends up being a lot of salt, so you can tone down the amount a lot (I used 5 grams). Just make sure that you use he same amounts on salt and water. Now put a few mL of oil slowly into the bottle. Punch a hole in the top of the cap and put a length of wire in it. You now have one fully functioning capacitor, go make 5 more.

Optional: to keep the bottles in order, make or find a metal crate for them

As Glenn781 pointed out below, 6 Snapple bottles with a 15kV 30mA NST can be deadly! If you are using a NST like his, use 8-12 bottles, not 6!
What is the pvc skrewey thingy for and also what is the flange for and what is a Supra base?
Hiii<br>I will try to make tesla coil<br>I have 800m of 0.5mm wire<br>I will make 1000 turns !!<br>Will flyback transformer have enought power to run tesla coil ??<br>And is 1000 turns enough
<p>Definitely. In this instructable he has 599.</p>
<p>I made it with 1260 turns works very good</p>
<p>looking forward to doing this over xmas should keep the in laws happy!</p>
<p>how do you make the top load</p>
<p>neon sign transformer,</p><p>No one should be building this if they can not Extrapolate and Simplify V = I/R</p><p>I mean come on I know Ohms law, but my maths is rubbish, and I only know basic algebra, but Tesla Coils can kill if you have; a Pace Maker, Epilepsy, history of a Stroke, history of DVT, history of blood clots and they can also cause Asphyxiation due to electrical interference in the respiratory nerves.</p><p>I know enough about Darlington pairs, Brige Rectifiers and Decade Counters to know my way around Electronics, and this is not something anyone should build if they do not feel comfortable with over 200,000 units of IV.</p><p>It is not something I would attempt to build, I already got a shock from installing a new fused circuit in my Mains Fuse Box, I do not care for another.</p>
<p>I don't want to be THAT guy but Ohm's Law is not V=I/R; it's either I=V/R or V=IR</p>
<p>This Tesla Coil isn't going to produce 200,000 W. I do agree though that safety needs to be a priority here.</p>
Keep off your mains box especially if its metal clad. <br><br>Have to agree with you though. I work in Industrial Electrics and some advice/techniques here are....uhm.....dangerous.
<p>The cat looks like the most important part of the project</p>
<p> CHECK THIS OUT 3.5 MILLION VOLTS</p><p>https://www.youtube.com/watch?v=ngiZBaS4Ago</p>
What tools you are using for bending those large copper tubbing???<br>And what the function of oil in these capacitors??
<p>oil as an impurity increases the capacitance. more the amount of impurities in between the plates more will be the capacitance. first study physics, then go on to make such things. &gt;.&lt;</p>
<p>if making the capacitor is not turning out to be a wise thing and if i want to buy a capacitor from the market, what should be the specifications of the capacitor? please tell me in detail. (how many farads etc.). i need to know everything</p>
<p>In my home, power supplied is 230 V, how can I make tesla coil.</p>
<p>Do not play with 230VAC power... you will die lol. Not funny but, try this it's a bit safer and easier. </p><p><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/1SF4KPqNK4c" width="500"></iframe></p>
<p>Thats not a Tesla coil it's a slayer exciter. good video though.</p>
<p>If you want to be eco just use http://inplix.com handbooks</p>
<p>I made it with INPLIX handbooks !</p>
<p>In my home, power supplied is 230 V, how can I make tesla coil.</p>
<p>two things:</p><p>1. buy a step-down transformer that steps the voltage down to 115 v but this would be alittle counter-intuitive</p><p>2. just get a transformer with the same output specs that has an input of 230 v</p><p>The good thing about this project is that it can be inprovised, really, any transformer would work in this project if the output is high enough.</p>
Did this really work
What volt of battery did u used
<p>In my home, power supplied is 230 V, how can I make tesla coil.</p>
Does this actually work to power things?
<p>Not in the way you probably think. It does create very high voltage which can overcome the potential difference between the coils and nearby devices, thereby allowing it to power nearby things. An example of this would be holding up a florescent light-bulb near it. There may be a spark that arcs to the bulb, but you will see it light up. You could also cut your usb charger short for your phone, and make an antena of sorts and put it near enough to the coil, and the power will go through and power your phone. I do not recomend the latter, and I take no responsibility for whether or not you do that...</p>
<p>Tesla himself said te purpose of this was not to have a light show but to bring power to the home. </p>
<p>What does 'NST' mean?</p>
Neon sign transformer. Typically in the range of 6-15 thousand volts and 30-60 milli Amps.
<p>@alarika - try ebay</p><p>Seems a like an older post and not sure if the original poster is around, but a few questions.</p><p>1) It looks like you are using the metal tray as one side of the capacitors, so you need to ensure the aluminum foil around the bottles is in contact with the tray, correct?</p><p>2) Finding NSTs but at 6kV to 7kV. Anything to adjust in the instructions or is it just that the spark is less?</p><p>3) So, how did you ground the secondary if you can't use your mains ground? Did you stick a wire into the literal ground (which certainly could work)?</p><p>4) What is that item on the top of the secondary? Just curious, but I assume it is just placed on top of the PVC with no connection to the coil, or did you attach the enameled wire to that metal 'dome'?</p>
I'll skip question one, as I'm unsure. <br>2) Recommended NST power ratings are between 10-15 kV @ 30-60 mA. Otherwise, the spark gap may not fire at all. <br>3) Using mains ground is not good. Rather than a wire in the ground, most pound a 2-4 foot copper pipe in the ground, and use a thick gauge cable to connect to it. <br>4) The secondary coil's wire is connected to &quot;the metal dome.&quot; Also known as a top load, a metallic dome-like structure is placed on top to act as a capacitor, and a break out point for arcs. It can greatly help increase the arc length.
<p>Where can i buy the NST </p>
<p>How tall is your secondary coil?? My instructor wants to know how tall it is. Thanks!</p>
<p>&quot;try out a nice <a href="https://www.instructables.com/id/Microwave_Oven_Transformer_High_Voltage_Rig/" rel="nofollow">microwave oven transformer</a>, and be safe!&quot; is a bit of an oxymoron. Those things will kill you as fast as anything else. Neon Sign Transformers (NST's) are much better suited for beginning HV enthusaists. </p>
<p>hahaaaaaaaaaaaaa it will fry everytjingh in your house</p>
&nbsp;for the love of god do not use 6 snapple &nbsp;jars with a 15kv 30ma nst you will get about 10 min of run time out b4 1 or more blow!!! all 6 were leaking badly. i think ill try a serise/parallel with 12 of them
<p>I got similar results. I ended up going with polypropylene. </p>
<p>Why do they leak? Isn't there any way to prevent leakage. Or how you know that caps are leaking?</p>
<p>they would leak at the top of the foil with streamers moving to the lip of the bottle at 15kv</p>
Its easier and more convenient to make a plastic sheet and alluminium foil capacitor.<br>
<p>But as i see from your picture that they are too far for arcing at 15kv if considering that you need 1kv per 1mm to break the air. Anyway is there a way to correct it?</p>
<p>there is far more then 1.5 cm gap! It was do to leaking. When it leaks you will see dim looking feelers bleed from the edges of the foil</p>
HOLY&nbsp;CRAP!!!<br /> <br /> I just fixed the Instructable!<br />
Bro could u help me but explaining how to do that in a video chat