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| Home > Circuits > Power Supply > Solid State Tesla Coil/High Voltage Generator |
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This is a fun and useful circuit for demonstrating high frequency high voltge. It can produce up to about 30KV, depending on the transformer used. It is cheap and easy to make, thanks to the standard TV flyback transformer used. It can power LASERS (although I have never tried), demonstrate St.Elmo's fire, and even cause a fluorescent bulb to light from as much as 2 feet away. |
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| Hello there, Thank you for this wonderful circuit. I have two questions: 1) Is this the same circuit for VIOLET RAY WAND? 2) Is there a video showing how to make it step by step? | ||
| About a month ago I read where someone was using a stun gun to launch potatoes. Well I got on ebay and purchased one for about $5.00. I've tried it out on several spud guns and it works quite well. Was Actually cheaper than a $6.00 lantern igniter. Spark is much thicker and goes further than one of those Piezo igniters. It also comes with a rechargeable battery! Lookup Viper stun guns on ebay, I think you'll be surprised at how cheaply you can get them! Dave | ||
| Can this light my house free electricity? (Editor's notes: Yes, of course.) |
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| I have been reading the comments and just wanted to add that this circuit does create a hi frequency resonance. This is caused by the switching times being set by the saturation of P1 (A,B). this means that once the circuit starts, It allows the power to flow through the primary in one direction (we will assume Q1 switches on the first time as this is down to very tiny differences in the transistors as to which one starts). The flow will the switch the other way as the base of Q2 exceeds 0.6V. at the same time as doing this, the voltage at the base of Q1 is continues to fall to the switch off point. This works because both the primary and P1 are centre tapped, with the centre being ground. A couple of things to make note of are.... Always us an AC flyback transformer not a new DC type. Make sure your flyback is ferrite cored and is gapped as this is what helps to set up the resonance. And lastly, If you add a spark gap to the secondary output, the circuit becomes safe to use even when your grounded as high frequency, high voltage with ultra low amps is the only thing that can pass the gap. | ||
| I have made a arc welder from microwave transformers that works very well. I would like to add the ability to tig weld. I have all the required equipment to TIG weld (argon/CO2, hoses,cable, tig torch, tungsten,ect.) except for the high frequency AC voltage that would normally be provided by the welding unit. If anyone has any input on how to add a high frequency AC mode to the homemade welder please let me know. | ||
| This circuit looks good, but I think its incorrect to claim it as "high frequency". It appears that it runs at 60Hz AC. This is incredibly LOW frequency for a tesla coil. The point of the coil is to create a resonant effect. To do this, you need very high frequency that matches the resonance of the coil. Also, this circuit is very dangerous because the pulse durations are so long. A super high frequency circuit with very short duty cycle (Pulse ON time of less than 50 microseconds) is much safer and will even be far more powerful. I recommend reading Tesla's patents and studying other info on Tesla coils.
Nonetheless, great work and thanks for sharing!! :) (Editor's notes: The circuit doesn't run at 60Hz. Its frequency is mainly set by the characteristics of the transistors and the primaries of the flyback. Flyback transformers don't even work at 60Hz.) |
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| Does anybody know, where to get already done product to buy like for example:I would like to have something like input: 3V - 12V output 500V - 1kV. I dont know even where to look, I was looking on google I couldnt find even one product. | ||
| what is the voltage input to T1 and what is the output voltage of T1 and what is the input voltage to T2 | ||
| i've made a ps with fly trnsformer,and it works but... what should i do with the other pins? sometimes spark occured between them. especialy some closest pins with ground pin. one of pin closest is also draws purple spray, but never spark | ||
| ZVS inverter or mazzilli inverter is the best flyback driver using IRFP250 | ||
| ahem... you say "remember to take your watch off.." but I can clearly see that YOUR watch is still on!!! Any experience you wanna share :) ? | ||
| what is the function of the resistors? i have nte 291 transistors rated for 40w 4 amp | ||
| I need electronic circuit for the continued effort of the current up to 100 kV | ||
| Hey ive been trying to build one from scratch but it keeps melting i would realy like it if i could get some plans oh and i have remade Nikola Tesla's teleport machine bad thing melts everything i send | ||
| that is crazy, Charging yourself like that. You have a light saber, until you accidentally ground yourself... Awesome project, but a bit too high volt for me. | ||
| is it dangerous for a learner? | ||
| Regarding regulation of the output voltage.... true regulation would be very difficult to obtain; however, the amount of output voltage will be determined by the number of turns in the primary coil C-D. If you want less output voltage, add more turns on C-D. Fewer turns may produce more output voltage, but run the risk of blowing the transistors, as they will need to conduct more current. | ||
| I have also seen a similar circuit using just one transistor | ||
| Let me be the first person in the history of the internet to leave a positive response on the forums. This circuit works very well, actualy to well. I was playing with the spark with screwdriver and it arced through the plastic. ahhhh i love the smell of RF burns in the afternoon. I estimate about 50kv. I havent gotten much chance to use it since I keep breaking the transistors via accidental short circuits and overheating. you MUST use heatsink compound. My circuit is an abomination using 7 resistors in parelel and series to get the values required. | ||
| I use a BUF420 M power transistor. It's rated at 450 VDC 30 Amps and will not fail like the 2N3055's do. this single transistor in a large TO-3 heatsink will drive large flybacks. I also stock large flybacks based on the old 1968 large Zenith TV sets (3,800 turns on sec). Mine have 4,200 turns of #42 AWG on sec for more output. These will drive plasma globes up to 24 inches in dia. | ||
| You can find it if you follow the red cable from the top of the screen... cant miss it... | ||
| abhikant; I think you need variable duty cycle to vary the output voltage. You would need a 555 driver circuit for that. | ||
| can u gave more information about Tesla generator. i want tray to build the generator.that just for my hobbys | ||
| can we control its high voltage if so then how | ||
| What a great man Ken you are, your site is so fabulous thanks to god who gave you that knowledge. | ||
| How can we regulate the output voltage? | ||
| cool site | ||
| i have an Ignition Coil from a ford modle A its in wood with a relay ontop and 3 coper rod contions 2 on side 1 on the end. it looks like it could take a lot more volts than the newer ones. Have any good ides. let me know. | ||
| maid my own tater gun and such but i need to learn how to build this badly lol im trying to use a sparker from a small hand held lighter that has the long neck and only works 1/100 times or so so were can i get most of theese parts alot of them i think i might already have but were can i get some of the from componets? ( computer screen?) | ||
| I built this circuit years ago for igniting my spudgun, it worked great! I tried the version with only one transistor as well but this version works much better! Thanks for this circuit! JW | ||
| hm i used this flyback (on the pictures) for runing real tesla coil. it is interesting effect as i dont need large capacitetors(high frequency). flyback is runned with 2- 3055 transistors on 18V and neon light is lit 1m away.. i think it is pretty good for round 80W... | ||
| where would i locate the voltage multiplier in a CRT pc monitor? | ||
| It's really great to see.But it should be very careful.i like to know the principle of this. | ||
| your project was great!!! i love it. im always viewing your page ever since my first view but i still viewing it until now. i just wan to learn from your good invention.. can ou teach me about it? thanks for your site... | ||
| 'thoroughly enjoy your web site' very usefull thanks ken. | ||
| hey so if you jump off being that charged wont you get really shocked or hurt when you ground??? please tell me . i never uderstood charging someone like a capacitor | ||
| Hey, could you use a cascade with this? btw seeing how everyone is complaining about the one person who is upset about the fact that this is not a coil i will too! NOT A COIL | ||
| That is friggin cool. I'm starting to get into electronics, and browsing through some projects when the word "tesla" caught my eye.....had to look. Anyone else reminded of C&C Red Alert? :-) | ||
| Hi. Would it be easier to use a signal generator and some transistor or opto-coupler to control a car ignition transformer? I am working on a system to have high voltage pulses at low amps. Thanks. | ||
| Vary good project. This isn't a tesla coil, but I think this is better then tesla coils, becourse you have the full power out (by the way, does this have any out-frequency?). I made an 220VAC converter to 624VCC, using two Eletrolytic 350V 10,000µF and four 5404 (two in paralell, becouse of the high current. It is vary powerfull, even without lightning, try to put the terminals in water with salt, when full-loaded. It gives a nice boom. | ||
| Hey u guys need to calm down. the guy is sharing his project with people so they can learn and have fun. No its not a real tesla coil but its still a fun project with easy parts to come by. Thanks for sharing. P.S. if you would like help building a real tesla coil feel free to e-mail me. | ||
| wow!! | ||
| Hey dude calm down we all know its just a flyback driver but its still kinda neat | ||
| 2N3055's! You need some real transistors with some hfe. How about a 2SA1943? | ||
| I've just made one of this high voltage generator. it works fine but i need more. i already got 2 secondary coils in series on one ferrite. the primary is not made yet. i wanna know if a can duplicate the 5 turns to 10 turns in order to get more power out of it and make The power transistors cool down a bit. I'm powering it with 12V cos 24V made the power transistors get really HOT (and yes. they are on a really big heat sink). what should i do ? | ||
| as the rest said it's not a real tesla coil BUT with one of this you can go further and power a SGO tesla coil (the real stuff) ... basicaly to use this instead of the neon sign transformer CHEERS !!! nice job and congratulations ! hope to see more ! Good luck ! | ||
| Have you any idea how to regulate frequency using a function generator to influence the primary? Thanks, Gordon | ||
| Hi , can you please fin me the schema of a regulator who can have the faulowing caracteristic ?? input :150-230 V AC output : 230 V AC power ;4-6 KVA thanks | ||
| Hello Nice cct, I have one going at the moment giving about 8kv and used for research into ZPE and oscillators. I tend to agree it is not a Tesla coil and it does not work on the theoretical Lonitudanal wave concept. It is neat because it uses the natural resonant frequency of the loop via feedback. A useful WEB site during my very brief tour it has captured my imagination. Bob | ||
| this is not a tesla coil | ||
| are you calling this a Tesla Coil? is just a flyback driver tesla coils are high frequency high voltage air cored transformers this is not air cored | ||
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