How to make a Desktop Tesla Coil

[@RainIndex]

That's a very impressive output for its size Edit: thanks a lot for the video, I managed to make it almost entirely out of reused parts. While I didn't get an output as high as yours, I did manage to get some arcs which is satisfying enough for now. And btw, you weren't joking when you said it gets hot, had to use a powerful computer fan with a microwave power transistor heatsink to keep the MOSFET somewhat cool. Very cool build, once again, thank you.

[@TheHMSBros]

Sometimes I have no idea what you're talking about, but I love it nevertheless

[@KeystoneScience]

+Brad G (thehmsbros) haha yeah I use a random word generator sometimes

[@Hanzomo]

Brad G I am in the second year of my apprenticeship as a mechatronics technician and i still don't know what he is talking about :D

[@ericcartmann]

This is electrical engineering. Anyone in who studies EE knows what he's talking about.

[@ToxicBananaFish]

I'm 12 and I understand this stuff just fine, although, to be fair, I had no friends in third grade so I read a lot of books.

[@wolfgangboettcher3126]

Okay ich habe diese spule

[@allanwatson3550]

Hey man love the video - I tried making a Tesla coil about a year ago with no luck and after some trial and error and messing around with the circuit u used I finally built a functioning coil - thanks again brother and keep up the great work!

[@gertlonks242]

Thank you sooooo much for this video, I've tried building a tesla coil many times and ended up failing, but then I found your video, where you show how to build the easiest circuit and tesla coil i've ever seen. Thanks to your video, I have ended up with succsess.

[@evanbrown6923]

One of the simplest and most concise Tesla Coil builds I've found. Well done!

[@Nate.mp4]

Hey, as a kid who really wants to learn this and tinker, I was wondering if you could make an "intro to electronics" video where you go over the basics, since these kinds of things are hard when you don't know how or where to start. Thanks! Love what you're doing!

[@screengames5307]

Watch GreatScott. I'm thirteen and he got me into electronics last year.

[@SkywardPvP]

Nate Greatscott, electronics.stackexchange, buy books

[@roznothejon]

ScreenGames yeah me too great scott is awesome (and i think he is German)

[@screengames5307]

+RADOVSKY QUEK Yeah he is

[@jamessmith9747]

Great Scott is the best!! :)

[@singhonlo67]

Thanks. it worked very well with a 30v 10A variable power supply. At 30V, it draws about 1 to 2A current so the tiny 1k potentiometer (rated 0.5W?) gets too hot. I would replace it by a large wirewound potentiometer. The mosfet is cold at 30V. But when I replaced the discharge wire by a toroid top load, it stopped the corona discharge and blew the mosfet. So the point discharge wire is necessary for the Slayer exciter circuit.

[@craigsmith1002]

I know what you are talking about and I like the way you simplified things without disregarding safety.

[@shashwatgadtya3286]

hey keystone, as you mentioned the 1uf 50v capacitor explodes if uses in the circuit, can you specify at what volts or amps does it explodes? , also 1 couldn't find the mpx capacitor you used , so can I use a 1uf 250 105J film capacitor?(using only one instead of two) , as it is closer to the values of the two mpx capacitor you used in parallel.

[@acex727]

I am using a polyester ceramic capacitor...and it works nice, yes you can try👍

[@shambhuprasadgadtya5259]

​@@acex727can i use a 1uf 400v film capacitor, it's also 105J

[@acex727]

@@shambhuprasadgadtya5259 yeh, only drawback I saw is it's tolerance rate is a little big.... Like 5-10% which means it won't be exactly 1uf capacitance..... But this wouldn't make any difficulties for the circuit so yes👍 you can

[@fungusenthusiast8249]

I just stumbled across this video and had all the parts needed to make it. thank you for making a tutorial. I like high voltage.

[@AlbertoLopez-ll4mp]

The best SSCT I have seen. It works perfectly and its very powerfull. My coil has 1000 turns. But I think I have fried my router and it was in other room and 5 or 6 meters away!!

[@putumadhava3519]

Thank you Keystone science for inspiring me to build this project, I actually have already make this circuit using IRFP 260N MOSFET, it works great, but even greater when you connect the source of the MOSFET to earth ground, i thought this because when Iam building a tesla coil with spark gaps, you need to connect the bottom end of the secondary coil to earth ground to close the circuits, and so I applied that to a solid state one , and it also works great.

[@mattjackson5025]

Lol listen at half speed everyone it's hilarious. He sounds all drunk

[@nabzim]

also, you may want to layer your secondary coil with varnish or lacquer. This protects the wire from damage and the wires slowly loosening from seasonal temperature change.

[@damianverhoeks3544]

this is the tesla coil i searched 1 year for thank you!!

[@corrosivecopper]

Amazing! So intelligent yet simple. Stuff that could have been done with those old Radio Shack electronics kits!

[@ogge8375]

cant even watch a 2017 vid without corona in it 5:33

[@soorajsajikumar5580]

Brrruuuhhhh

[@DennisMski]

After three days of troubleshooting, I finally got it to work! I had the drain and source swapped around on the MOSFET and in addition the primary was at the very bottom of the secondary. Push it up a little bit. Play around with the height of the primary. Also... Even if the primary has a sufficient coating on it, add more. I have a regular wire and it still managed to arc through the insulation. Spray the secondary with polyurethane or cover it up with electrical tape. Best of luck, people! My TV is acting funny when I play around with the arc using my fingers. The TV will suddenly change inputs. It does this reliably. I can't figure it out.

[@glopbot2]

These projects are always so cool! You make it look so easy!!!

[@a.j.spaude8368]

This man is a genius

[@ayitsyaboi]

Oh man I was so in awe by the light bulb that when the cap popped I almost shit myself.

[@acex727]

Man you talk like a rapper😂❤ Anywyas love this

[@dhruvvyas6347]

the perfect example of how to make a Tesla coil thank you very very much

[@bronsonstephens5799]

Dude. You're Almost at 100,000 Subscribers. Congrats. You Really Deserve It. How Do You Manage Your Time So Well?

[@Taskulare]

This is a cute little coil, nice! As a suggestion, you might try adding a high-power zener diode across the mosfet gate and source to limit the voltage, rather than just a resistor network, although i suspect you'll still need a relatively low-value resistor from VCC to the gate for bias, as with a vacuum tube tesla coil.

[@franklopez9903]

Liam Taylor How about addinh some flyback diode in parallel of primary coil?

[@rupeshpatil5568]

@@franklopez9903 Great idea the transistor will be protected by the back EMF of the coil

[@electronics3992]

I made same circuit 3weeks ago with 1260turns on secondary ! 3cm spark ! now im working on vacuum tube tesla coil ,811a tube

[@MrCareer707]

I made this Tesla Coil very impressed with the results, 3.2 cm diameter PVC tube 1523 turns of 0.315 magnetic wire Secondary coil 2.7 turns of 2mm single core earth wire Primary Coil IRFP260N Power Mosfet 2x 0.47uf 275Vac class X2 anti rfi capacitor 68 Ohm 1/2 Watt Resistor 1k potentiometer Power source 19V 3.2A Laptop Charger Home built Variable voltage boost driver delivering 24.1V to 35.6V With the boost driver attached this coil outputs 514 Volts at the secondary coil @ 29.8 Volts input.

[@user-se2gd2ib6y]

Does it make a sparks? Please if you dont mind if i get your email? Or any social media account?

[@MrCareer707]

@@user-se2gd2ib6y yes Helena it does produce 1cm sparks from a needle that is electrically connected to the topload

[@user-se2gd2ib6y]

@@MrCareer707 can you send me the diagram?

[@MrCareer707]

@@user-se2gd2ib6y it's the same schematic as what is contained within this video, if you have the components that I have listed, the correct thickness of wire as I've included above and put this together according to the video schematic and the building of this circuit by the host, it should work,

[@user-se2gd2ib6y]

@@MrCareer707 please can you send me picture of your circuit? I need to make it by this weekend :(

[@ankanpradhan9724]

I have tried this 'OSAM' circuit with IRFZ44N mosfet and it really worked for a few seconds and then blasted like a fuse, even though I was using a heatsink. Then I tried it with HRF3205 and it didn't work but heated up. After that I used another mosfet which is IRF540 and it also didn't work. In my opinion this circuit works best with IRFP260N mosfet.....

[@Manzzzzzz]

you speak really fast, are you a rapper?

[@AAAyyyGGG]

mirror speaker 1 he knows we're really busy and haven't got much time to watch videos!! :-)

[@theterrarian591]

for me he is talking kinda slow.

[@mareksvrcina5279]

The Terrarian you are extra fast

[@texasblaze1016]

Hes too well educated to be a rapper.

[@anonrider8870]

i dont really think that it is fast, i think other youtubers are slow for me personaly it is normal speed

[@rosypradhan801]

Aww man😔, i tried making this tesla coil 3 times, but failed, currently using a irfp 250n, a 1uf 400 polyester capacitor, followed the instructions step by step , but still doesn't work and i have also tried fliping the ends of primary coil many times and also did continuity tests but no luck, i think its because of the 68 ohms resistor i am using?also if the capacitor connected to power lines only then how does it create resonance? Very confused right now Note: the MOSFET gets hot very quickly and the potentiometer too EDIT: GUYSS it works, turns out you have to wind the primary coil starting from the upward going downward , like a downward spiral, it took me a few tries , but it worked, if yours don't try to flip primary connection after winding it downward, also you have to wind It opposite to the direction you winded your secondary Also currently using irfp 460

[@stellaprotest1933]

Just wanted to say that I think Your awesome ... and wanted to Thankyou for sharing all your knowledge. I love your quirky personality, it makes your videos fun and the comical side makes you even better to watch you are giving science a new age twist (simply by being yourself) 😁 and I feel this brings people to the subject of science who would of been more likely to bypass science thinking they lack any interest in it.. but you sir I am sure have turned many heads and started them as heads thinking science and that's to be commended so thankyou for all your work and all you will continue to do just no it doesn't go unappreciated ... keep up the good work Tesla would be proud ppl like you keeping the energy of his essence alive Love and light 😇

[@Boop__Doop]

Could I use a 2-3 cm tube for my primary

[@AL_O0]

You weren’t kidding when you said the transistor was going to get hot, I used a relatively big heat sink, powered the circuit with 24v and after a minute I smelled burning, touched it and it really burned my skin. I had to adapt an old computer Pentium 4 heatsink, and it still gets quite warm with that huge surface area

[@andrewel5383]

Hi could you do a video on boost converters, and also how to fix the shorting problem, like I put a wire across my output and the boost converter turns off, and so I'm wondering how I can power a slayer excited when my boost converter keep turning off or flashing

[@szafran1543]

Great video! I'm not an electric engineer but I think that you should mark "ground" as "GND", no "V-". I'm not trying to pick holes but it makes thinls a little confusing. Nevertheless nice clip!

[@szafran1543]

Maybe you are right. I'm familiar with "V-" standing for supply which is symmetrical to GND. But as you wrote - this circuit is not grounded so it is not the issue. ODPOWIEDZ

[@SebastianBosch]

How many amps does it take at 30 volts?

[@greenthizzle4]

Sebastian Bosch 10,000

[@TeslabladePlaysMC]

Hey, again. For your big tesla coil, could you try to do a single transistor SSTC with a interrupter/ audio modulator? MatesHV2 made a good one and posted a schematic.

[@burhanmaryam]

What power supply I can use as I don't have a variable power supply??? What Volt and Ampere should be ??

[@JohnWilkinsonTesla]

I like the rapid pace

[@captaincrazy5008]

What did you use for the top load of the big tesla coil you showed at the start?

[@DennisMski]

It was aluminum tubing for dryer vents. Available at any hardware store for cheap.

[@captaincrazy5008]

Thanks

[@dennismski2307]

Awesome instructional! Does the gauge of the primary coil wire matter? I am using 22 AWG for the primary and 30 AWG for the secondary. Would that suffice? I'm also using an IRFP460 for future scaling. You should see the size of the heatsink I've got for that MOSFET.

[@yiannisyiannis]

Hello there. Have you made the circuit with IRFP460 because I currently only have 460 and I want to know if it works!?

[@sto.tomastristanmanuelt.7070]

there are many circuits that uses irf460 mosfet, in fact it is mostly recommended because of its high ratings@@yiannisyiannis

[@electroclau]

this is what i waiting for.. a powerful circuit for tesla coil.... awsome boy keep on work !!!!!

[@demai4253]

Tesla coil instructions r g8ly appreciated👌🍻

[@WarHasNoRules]

I love your videos keystone, it has become like a hobby for me ... electrical engineering science is the best!

[@emeraldseason]

Im having trouble getting this circuit to work... I have used all the right components including the IRFP260 mosfet, the 100watt 50 ohm resistor, and 2 0.47uF mkp capacitors but all that happens is the transistor fries... any things I can take a look at to get this working or get in contact with you somehow?

[@hardnachopuppy]

What voltage are you using in my case this circuit only works above 18v

[@Snow-tk9zv]

Would u mind explaining what is the use of the capacitor in the circuit?? and u r using the voltage divider because the mosfet has a gate-drain capacitance right?so the feedback from the secondary is just enough to change the voltage at gate betwwen its cutoff and saturated state??

[@milespeterson5049]

i don't have that transistor. Where can I get one? and it's not CHEAP either.💲💲💲

[@celifreo6586]

thank you, that is exactly what I have been trying to build!

[@a_k6451]

I saw that there was a heatsink use dso I just wanted to ask that is the fan in a heatsink compulsory to use ?

[@keishannarinesingh5982]

is it a magnet or electrical field that is causing the lamp to light

[@lukemaher1062]

you should consider doing a video on the basics of circuits and what the parts do to help aspiring scientists like myself, great vid keep it up :)

[@Jtw0912]

Is there a difference between a mosfet and power transistor? They seem to function the same, or are they even just different names for the same thing? also, whether its power transistor or mosfet you say it doesn't matter what you use, and im just curious why.Thanks.

[@macherlakomaraiah2358]

If the number of turns in secondary winding are low can it give sparks

[@oliver1834]

were you isolated or grounded when touching

[@mheermance]

That heatsink is a monster.

[@bukacagurishvili2480]

can u explain how the cercute works and how do u finde the rigt frequency pls

[@tunnelsnakesrule7541]

Is a DC powersupply that big and expensive necessary or can i use a smaller one?

[@MuzzaBikeFix]

Mate I just listen coz I got no idea what you are saying,but it sounds legit...and very cool. Suggestion please could you show us how to make a flux capacitor,,?

[@tornadowild1]

i know a lot of people complained about you talking too fast, that never bothered me before, but its good to see you slow it down a bit, i wish you and your channel the best, really enjoy your content. btw: do you call your channel "keystone science" because you are in Pennsylvania, because of the "keystone state" just curious, i live in PA. anyway, good work, love the channel, keep up the good work.

[@akshaydarekar5863]

Using a MOSFET is a good idea. Although an unregulated power source with high current is suitable. Batteries are bad idea to use for it, since they have low current.

[@FredtheDorfDorfman1985]

Could you not use two anode to anode, 12 or 15 volt zeners between the gate and source to protect the gate dielectric from over voltages, or would that interfere with the feedback?

[@KeystoneScience]

That would be good! I have tried something like that before, and it seemed to work if I remember correctly

[@FredtheDorfDorfman1985]

@@KeystoneScience oh ok, cool. I was thinking about the capacitor popping. If I'm not mistaken the capacitor, in addition to helping to smooth any ripple the supply might have, also kind of acts as an RF bypass to short out the RF created on the transistor's drain, and the primary, to keep it out of the power supply. Couldn't an RF choke be placed between the capacitor's positive connection and the primary to block most of the RF so the capacitor doesn't have so much work to do as a bypass? I built a scaled up version of this Class E, or kind of Class E, circuit: https:highvoltageforum.net/index.php?topic=152.0 and the RF choke I used at first wasn't large enough for the RF that was being produced. I didn't have the bypass caps pop or anything, but one time when I was connecting the clips from the supply, and forgot that I hadn't turned the potentiometer down, it started oscillating when I connected the second clip. The side of my left hand was touching the negative clip and when I connected the positive clip it burned my fingers a little. Left some scorch marks on my skin from the positive clip. So I put a better choke on it and it blocked the RF better, or at least more of it so the caps could bypass the rest. Good thing I was using lead acid batteries for the 24 volt testing supply. I wonder if the RF would harm a rectified or variable supply in any way? Also, in regards to the zener diodes for gate protection, I thought it was interesting how the guy that made that Class E circuit I just mentioned used 1N4148 diodes in series with the 15 volt zeners to reduce the zener's capacitance. I haven't seen that done with protection zeners before. I'm used to protection zeners on the outputs of gate drive transformers so they can clamp over voltages etc, but those are usually not operating at the high frequency that his circuit operates at, being such a small coil at 14 MHz. I think the anode to anode protection zeners are called transorbs? I guess it doesn't matter if they're anode to anode, or cathode to cathode, as single piece transient-voltage-suppression diodes are cathode to cathode.

[@bournsted4512]

I like it very much.. the parts are easily available and can build it easily.... awesome.

[@liqnick6]

Will it still work if I scale it up? I've built a small one and it works, but I was thinkg of building a bigger one: 5.5cm radius, 1000 turns, 0.5mm wire, 50 cm height for the secondary and about 5.5 turns, 1.5mm wire with 1mm spacing between the turns for the primary. This coil works with my sparkgap setup (makes 4-5 cm arcs) but will it work with this circuit too? Thanks!

[@kvlpnd]

Is it necessary to put such large heat sink? I would have used a little smaller one.

[@atharvahampiholi300]

Amazing technique.. But how much voltage do you think the MOSFET can handle Before it blows up?? And i didn't understood what of capacitors you were using. They were of 0.47 micro farad each and being connected in parallel they provide an equivalent capacitance of 0.94 microfarad.

[@KeystoneScience]

+Atharva Hampiholi umm the amount varies from mosfet to mosfet, but mine from drain to course can handle about 160 v, of course though with a lot of current you need to keep it very cool so it doesn't break down. And yeah, they were around .94 microfarads, I just figured it was close enough to still work fine

[@atharvahampiholi300]

+Keystone Science Thank you very much sir for replying.

[@petezel]

Yo! you need a zener diode connected directly at the gate to clamp your gate voltage to below VGS_max. That will help with failure rate of the switch.

[@KeystoneScience]

+Pete S thanks that's a super great idea! :D

[@LoneWolf-zx3iy]

I have questions-1. You used 50 Ohms resistor which seems rather very big and thick. What is the power handling rate for R1 you used? 2. The mosfet you used with ratings 200V and probably 50A continuous drain current. I have Power MOSFET of 200V,8A; 200V,18A; 50V,55A; and 60V,110A. What is the exact criteria for you to choose what MOSFET you are going to use? Is it voltage or current? If current, then what is the maximum current handling capability for jumper wires, primary windings and secondary windings? 3. What is the maximum current rush, voltage output and if I use battery of 12V,7.5AHC, two of them connected in parallel, how long does they gonna last if remain connected? Other than this, it's fantastic idea.

[@shanetaylor7581]

Yours has more ark than mine so might have to do less turns on primary coil ?

[@MrDsnightmare]

Hello sir very good your video i want to know something please I would like to know if on the secondary coil If I put more wires is what is good or the system will explode thank you for your answer

[@entemomohTV]

does circuit ground have to be connected to earth for the arcs to appeare in mid air?

[@parkflyerindonesia]

Awesome video dude! Will bring this to the desk of elementary students I teach, but with battery 👍😁

[@TomMeehanMake]

Nice simple design, looks great for demonstrations. Seems to be more like an Oudin coil than a Tesla coil (which is fine - Oudin coils seem to be safer to play with).

[@saimhasand0074]

Can I replace the pot with same value resistor? I can't find 1k pot? Also can I use irfz44n mosfet? Pls reply

[@theguitarist1290]

Im really new to electronics, and I am just curious, what is the purpose of the potentiometer / transistor part of the circuit? What would happen if one were to ignore it? Would the circuit burn itself out?

[@greg77389]

I noticed you only used one turn for the primary coil, is there a reason for that? It looked like your larger Tesla coil had more turns for the primary.

[@Arinx7]

I would love some kind of intro to circuit diagrams, or something similar!

[@sankalpnayak8411]

hi. sir please tell me if we can use IRFP150N MOSFET in this the Tesla coil

[@ahmaddraws9144]

can i use a 47 ohm resistor or will i kill the resistor? what about 2 47s to make 94 ohms, (or will it be too weak?)?

[@mainakroy4769]

Im thinking to make it i just some help i dont have a powersource will 2 9 volt work

[@NoorquackerInd]

Subscribed for this and the Microwave Gun.

[@oliver1834]

where didd you get the mpx capacitors

[@emilioizzo6738]

can i use a 12v 3 amps power supply?, will the sparks be like those?

[@kobe.bryant.5]

can i use a MN2488 MOSFET transistor I have a bunch of them instead of the MOSFET you are using?

[@jhtaylor19]

Can you make a detailed list on the description of what to buy.

[@JesusHernandez-fu9dg]

Hi, can i replace the mosfet with the IRF640N?

[@curiosity551]

is it fine to use irfz44n mosfet rather that one you used? was it a n channel ?

[@shoaibakhtar2484]

r!shi kesh, yes it was a N channel mosfet

[@kommander9638]

Usually you need two electrode to create a lightning between them. One electrode is the needle at the end of the secondary coil,rigth? I don't understand where the other one is.

[@keltonbailey]

The voltage is so high that the air is the other electrode.

[@dericklong6191]

Could I run 1200 turn 15 inch tall 2 inch wide secondary? If so would I have to change the resistor ohms

[@mugendaina3996]

Do I need such a big heat sink?

[@treverbelmont8393]

Do we need to use magnet wire because I tried to use the wire from the secondary coil of a microwave transformer but it didn't work

[@wowo-ve8td]

Your channel has blown up fast congrats love your videos

[@evandouphrate9811]

Will this damage electronics if it gets too close to them?

[@KeystoneScience]

+The Mad Tesla yes

[@TVV-04]

Great work, nearly at 100k, hope you get the play button soon, you definitely deserve it!: )

[@SierraMints]

Be made my secondary coil. It has 470 turns. The diameter would be 0.0315 inches. The the gauge of the wire is a bit bigger than yours. And the height is 10 inches. How many turns would the primary coil have to be?

[@jonahw1759]

hey nice watch, i have the same one but i need to ask are you left handed? I'm not and I'm right handed and its always considered weird when i wear it because i wear it on my right arm too

[@smburhan6323]

Believe it or not I made it !! Works fine but the power supply keeps over heating !! Using an adopter with out up of 24V and 16VA.

[@mpherg]

so... is that a MOSFET or just a regular NPN or PNP transistor. considering to make this, so I would appreciate an answer!

[@KeystoneScience]

+mpherg that is a mosfet I believe , it's an irfp250 n

[@FabioKastro]

Let's my boost converter can output 80v, will this Tesla Coil still run? Or just blowup the transistor

[@PyroTronix]

If I increase the amount of turns on the secondary coil. Would it so just be more power full or would transistor burn out? Plz answer

[@prototype9000]

have you tried a looser coupling ?