Hi, I want to make my own high voltage capacitor But what is a capacitor? It is basically made by any two electric Conductors placed close to each other with some electrical isolator between them. Like two wires running parallel to each other or two lovers separated by glass. I Love you, too a capacitor stores energy in form of electric fields. If there is a path to place some charges on one side then it attracts the opposing charges through the other path and charges the other side. Now even if I cut the paths it will hold on to its energy and the first popular capacitor that was made like 300 years ago was called a Leyden jar It has quite a simple structure and I also noticed that the king of random Junior made one and I watch the video and Let’s just say I don’t appreciate misuse of capacitors That’s quite rich coming from me, I guess and thanks to circuit specialists. I’ll give away two hand tech scopes at the end I mean 200 megahertz two channel scope for [very low price]. What is your excuse for not scoping curves? Let’s make a Leyden jar and explain it I took a plastic bottle for vitamin pills and peel the label off because they thinner the wall the higher the capacity I cover the outside of the bottle with aluminum foil as one side of the capacitor plate. Cut the extras Tape the edges with electric tape There Then we put a metal screw or nail at the center of the lead all the way in so you can get into the water in the bottle later I can’t put metal plate on the inside of the bottle so instead I fill it with water which is not conductive and Then add salt to it to make it conductive So now the aluminum on the outside and the conductive saltwater on the inside are the two isolated conductive plates of my Capacitor and now I add some length of metal wire to the end of the screw which will help increase the surface Contact to the saltwater and reduce the resistance. Now, this is pretty much done But the actual Leyden jars have a smooth metal sphere at the end of the rod that removes all the sharp edges where the charges can run away from I don’t have a metal sphere But I have a ping-pong ball that I can wrap inside aluminium foil and make it as smooth as possible put the end of it around the screw and Cover the rough surfaces with electric tape and we’re done. Let’s see if I can measure the capacitance According to the meter the Leyden jar is around one-and-a-half Nanofarads, which is pretty small but it’s around what it should be Now King jr Used the PVC pipe and rubbed it with paper towel. PVC picks up negative charge and he charged the bottle like this Which is incorrect. Helping me with the material I need for my video. Thanks King What is wrong? A capacitor is a two terminal component: if charges come in from one side The opposing charges need to get in from the other side. The way King jr. Is doing it it is still getting charged but not as the capacitor it is but as Anything can pick up charge like this PVC pipe the outer Surface likes to become positive because the negative charges on the inside of the bottle repel the electrons on the outer surface But they have nowhere to go until he touches the surface Try grabbing the foil and then touching the nail to see if I get a shock Oh? I got a shock just from the foil That’s not how it’s normally supposed to go But so now the jar has a chance to give out some of its electrons to King Junior’s body and become positive while King jr becomes more negatively charged now when he touches the center of the Leyden jar The discharge is not too great because both the center and his body are charged negatively and the remaining energy dissipates through his body. There was a little bit. Oh, a little bit of a shock. Let me show you how to do it properly The outer surface is connected to earth which is also connected through this wire to my body and grounds my body I hold the towel in one hand like this and Rub the PVC pipe against it while passing it over the center of the Leyden jar like this now when I do this the PVC pipe picks up negative charges and places them at the center of the Leyden jar which repels the Electrons on the outer surface into Earth the towel becomes positive So it sucks electrons from earth through my body and becomes neutral again So next time when I pass the PVC through it it can send more charges through. It’s basically like I am pumping charges into the capacitor [gets shocked] I’ll have to hold my hand a little bit further This is very much the same way a Van de Graaff machine works. Do you hear the charges going in? Okay, let’s see if it picked up any charge. [gets shocked more intensely] I forgot to unground myself That was painful No more touching with hand. I made another grounded ball to discharge it. Let’s try the different number of strokes I made it darker too, so you can see the arc Okay ten strokes Yeah a little bit. That looked like a one kilovolt discharge Here’s 20 strokes Not bad was probably around five kilo volts and here’s 50 strokes Wow that was strong maybe around 10 kilovolts Okay hundred strokes Whoa-ho-ho That was like fifteen sixteen kilovolts. And then the King junior tried to charge his Leyden jar using one of those plasma globes Which is very much the same as a Tesla coil, and that wont work either nothing Nothing whatsoever the reason is simple something like a Tesla coil outputs high frequency AC arcs while a Capacitor shorts AC so there wouldn’t be any charge buildup on the capacitor Now I want to see how much current it can send through my body So I’m gonna use a one ohm shunt resistor in series with my body so every volt is one amp and twenty strokes or around five kilo volts and measure across the shunt using my scope Okay, twenty strokes, of course This is not going to be super accurate due to the line inductances and the fast nature of the discharge but we’ll see Okay ready [agonized yelp] oh **** Wow, it hurts where it goes in and where it goes out to the ground Of course, this is much worse because it’s capacitance is around five times larger than a regular discharge a human body experiences So the duration of the pulse is much longer and a five kilo volt on this one can hurt as much as twenty five kilo volt of a regular discharge I like King junior or senior. Try this one and if you look at the plot you see there is a faster spike of up to 12 amps through my body and then the current stays around five amps and discharges slowly to zero in around seven microseconds Here’s the screenshot if you want to see more accurately. So although the voltage and current are super high I’m saved by the fact that the pulse duration is very short So the energy is limited. If the voltage is high the current is high. Now this capacitor works but it’s a piece of junk. Why? Because every capacitor has an equivalent series resistance or ESR that we try to minimize But this guy has a huge one. The huge ESR contributor of this Leyden jar is the awful conductivity of salt water if I [gets zapped] [curses] Forgot to discharge the damn thing. Let’s open it. Now if I measure the resistance between the salt water and the top ball Around three to four kilo-ohms. It’s huge compared to regular capacitors with milli-ohm ESR. Now I want to make a high voltage high-capacity low ESR capacitor and for that I bought this which is a desk cover made of “material” I suppose it’s some sort of mylar or something I cut two sheets out of it and hopefully there are no punctures on it Otherwise the high voltage will always find a way and arc through and ruin the voltage rating I also cut two sheets of aluminum foil half an inch shorter than the mylar on each side and I’ll glue it on the mylar I put some glue on and spread it in a very thin layer Then I stitch my aluminum foil on right at the center And make sure it’s completely flat and thin Very nice Then I just tape a piece of flattened wire like this to one corner of this sheet Then I flip it around and glue the next sheet of aluminum right behind the first one Now I tape another wire to the opposite corner of the first wire on the second sheet Okay, we have our basic capacitor, let’s measure its capacity At around 5 nano-farad you’re already ahead. But now we’ll roll this tight this way the layers will overlap multiple times increasing the capacitance much more But now that I think about it rolling it should only bring the outer surface of one Beside the outer surface of the other one. So double the surface area and double the capacitance. Am I wrong? Let’s check it. Crap, I totally forgot first I had to put this second layer of mylar. Otherwise, I would short the two layers and now we roll again Ok, let’s see what we’ve got. There you go much smaller than the Leyden jar and it’s capacity is around 10 nano farad much more than the Leyden jar and I think it can still do upwards of 10 to 20 kilo volts This will take forever to charge using my PVC pipe though being almost 10 times my Leyden jar if this took 20 strokes to get A decent arc. This will take around 200 Well, I can charge it to 2,000 volts using my microwave transformer through a puny single diode rectifier Let’s give it a try Okay, is it charged? Let’s see Ouh it is charged! Well not big enough, though I really wish I had a Van de Graaff machine so I could charge it to a million volt or more Maybe I should make one of those [GIVEAWAY TIME] The good people at circuit specialists have provided two hantek scopes to give away to my patrons and viewers I have used this scope briefly before and have seen good feedbacks about it, too So if you are also into scoping curves You can become my patron at or sign up from the link in the description for free It is on sale for [very low price]. So, you know how much you can learn by seeing actual waveforms. Do you? [pch puttaputta pch puttaputta pu-pch] [pch puttaputta pch puttaputta pu-pch] [pch puttaputta pch puttaputta pch putta-pch puttaputta pch pu-pch]

100 thoughts on “Make a SUPER HIGH VOLTAGE Capacitor

  1. Hey All! Congratulations to the two lucky winners of the Hantek scopes, and thanks everyone for sticking around!
    – Clement D.
    – Nikhil S.

  2. If you have a weak heart you can get killed doing this. A while ago classes that taught automotive engineering used to get the class to hold hands and got a car battery. You can see where this is going but the point was to see how the power was distributed between everyone as electricity passes through everyone. Until someone died. In high school they do not allow this as kids can have frail hearts to.

  3. I learned from these channels more than I ever learned in school, it’s just the Youtube not talking about the movies and TV shows and other sources like reading

  4. Does he shock himself, so often, on purpose for comedic effect and/or as an example for us to watch what happens when you make minor mistakes?

  5. Smart man , but you'd be good at comedy too. Just please not any of the PC nonsense that we are fed up with . You must love shocking yourself 🙂

  6. Aren't you worried about your heart? When you let electricity pass from one hand to the other it crosses your heart man.

  7. OMG…I absolutely love the presentation of this guys videos. Normally, I find hearing English pronounced badly or incorrectly is mildly annoying (not d at you Murican toobers Lol). However, this presenter’s broken English is delightfully endearing (tho’ he does say aloominum…this element does not exist)….I could listen to him for hours. Content wise…his comedy and ingenuity is gripping. Long may this channel run??

  8. Hahaha! Each time you zap yourself it reminds me of my junior automotive days…ignition systems didn't care what I was I was touching wrong. When I became part of the circuit it felt awful 100% of the time.

  9. I used to make HV capacitors when I worked at an electronics club for school kids in Moscow, and we used plastic file folders as insulators. The capacitors worked quite well: we usually got about 7 nF (without gluing the aluminum foil to the plastic to save time) and a voltage rating of anywhere between 5 to 20 kV, depending on how well the caps were made. Dielectric absorption was a bitch though: I once killed an LC meter with a capacitor that I'm certain I had discharged.

  10. Maybe should run your ground so the current doesn't pass through your heart. Clip ground to elbow on same arm as power. Not being smartass but seems like you have taken alot of volts/amps already. Gonna mess up your natural pacemaker eventually and give yourself a heart attack if you're really shocking yourself in all your vids. Still give you much kudos cause your educational and funny . Thanks sparky ⚡

  11. Hi Mehdi !Please, can you make a video about spot welders ? Their are arduino based ones and i'd like to have you opinion about these as they are designed for batteries nickel strips soldering, and they are thin, like 0,2mm.. What is the science behind and is their a way to spot weld something like 0,5mm steel strips ? Thank you Mehdi if you can do somehting about this or answer my question in any way 😉 Take care !

  12. I am currently studying capacitors in my university physics class and damn I have learned more from you than my professor lol

  13. Haha when you did the hand on the glass thing you should of zoomed out showing you doing it yourseld n just look at the camera lmao

  14. سلام آقا مهدی کارهاتون واقعا عالی هستن
    چطور میتونم در تلگرام یا اینستا با شما در ارتباط باشم؟ ممنون

  15. You said that Energy = Voltage * Current * Time. What value of current, and what value of time? Voltage is voltage, but could be megavolts or milivolts… Current is amps… Are you talking about milli-amps, amps or mega-amps… etc.? Are you talking about milli-seconds, seconds, or minutes… etc.?

  16. You deserve my respect. I'm a Mechanical Engineer and laughed on those shitty flywheels but you developed my interest In Electricity.

  17. What makes this high voltage? You are pumping charges into the capacitor but why does the voltage raise? Normally the capacitor is charged to whatever voltage the supply is but there is no high voltage supply here, or is there?

  18. Don't try this at home even I made it very intelligently it didn't work at all plz you don't waste your time doing this if your buying any of the products to make the layden jar please it's waste of money it's it's just false video……….,

  19. while charging the salt solution capacitor, the 2nd plate (aluminium foil) is connected to earthing (ElectroBOOM's body). he then rubs the PVC pipe and charges the metal ball with negative charge. the charge on PVC pipe is neutralized by earthing (ElectroBOOM ) here, my doubt is, why dont electrons from metal ball go back to PVC pipe (back to earthing as it is neutral because charged bodies transfer 50% of their charge to neutral bodies. this cycle of being discharged goes of till neutral state is obtained.) ?

  20. Would be great if the mere basics (of how electronic components and schemes) work get covered more.
    Can anyone recommend any channel that does?

  21. If copper and aluminum cause galvanic electrolysis, in certain environments, I’m curious about weather that would impede or enhance the efficiency of the charging, storing and discharging functions…? Hmmm

  22. I’m pretty new to electrical things but i am thinking of making this. I only have one question. How would I ground myself and the jar

  23. How come I've never seen the mylar capacitor and in any other video by electro boom? Last time I saw the video of him charging capacitors with a Van de graaff machine, the mylar probably would have done a lot better. And that video he uses his Leyden jar instead.

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