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Questions tagged [tesla-coil]

A Tesla coil is an electrical resonant transformer circuit invented by Nikola Tesla around 1891. It is used to produce high-voltage, low-current, high frequency alternating-current electricity. Source: https://en.wikipedia.org/wiki/Tesla_coil

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Troubleshooting my DIY Tesla coil setup

Firstly let me say I'm relatively new to HV, so apologies for any silly mistakes. I made a Slayer Exciter circuit, powerful enough to drive a flyback transformer and make 3mm sparks. The circuit is ...
16-bit-apps's user avatar
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My Tesla coil isn't working

I've pretty much decided to make this mini project in order to get my other classmates more interested into researching electrotechnics, and I've chosen a Tesla coil to be a very cool example of how ...
Bevc Kardelj's user avatar
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Damage on Tesla Coil Secondary - is it ok?

I am building a small tesla coil (the OneTesla TinyTesla) and my secondary coil has some small damage. Is this damage tolerable as long as the wires still have continuity, or does it need to be a ...
Klumpy7's user avatar
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Bumps in secondary coil

I am making my first Tesla coil, and I need some advice on the secondary coil. I have some bumps present and I don't know how to remove them from the wire. Do I need the wires to be straightened and ...
thriam maharaj's user avatar
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Does a Tesla coil's secondary parasitic capacitance and top load capacitance add up?

I came to this question recently and suppose it's true that the secondary's parasitic capacitance does indeed add up with the value of the top load's capacitance, but I really want to hear someone ...
Roman's user avatar
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Tesla coil music

I want my solid state Tesla coil to play music. I built it to only accept square wave input. Does anyone know howI take a normal melody (no voice,) only keep the main soundtrack (no bass or anything ...
George Chita's user avatar
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Can I use a Slayer exciter in place of a NST in a spark gap Tesla coil?

Could you use a Slayer exciter in place of a NST to power a spark gap Tesla coil? I want to build a high power Tesla coil but unfortunately do not have the money or outlet to buy/plugin a pole pig to ...
Not My Name's user avatar
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3 answers
474 views

AC current on DC capacitor in a Tesla coil

I'm following online guides to build a basic spark gap Tesla coil. Almost all of them have an AC current transformer like an NST, but the capacitors they specify appear to be DC (or rather they don't ...
Neobium41's user avatar
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Should the protection filter be before or after the full bridge rectifier in a Tesla coil?

I'm making a basic spark gap Tesla coil. I would like to use a Terry filter to protect the neon sign transformer (NST.) I also have a full bridge rectifier to convert the output of the NST to DC. ...
Neobium41's user avatar
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113 views

Controlling frequency of a Slayer exciter circuit for plasma magnetism tests

I want to build a Slayer exciter circuit from a 48 volts 50 ampere power supply. I have the necessary transistor, but I want to be able to tune the frequency of the circuit with a Raspberry Pi and ...
Andi Iacob's user avatar
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What would happen if a Tesla Coil arcs and touches a nearby 120V AC outlet?

I have a Tesla Coil that looks like this: If this operated very closely to an AC Outlet, and an arc emerged and touched the outlet, what would happen? Would the unit short-circuit and explode? Would ...
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Why is my Tesla coil not working?

I'm researching about Tesla coils and I made a prototype for myself two days ago. I benefited from other topics on this website, and Instructables and Quora. Despite all my trying it didn't work. I'...
Ömer Çelik's user avatar
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Simulating SSTC Tesla coil circuit is not working well

I am running the following Tesla coil circuit in Open Modelica: I have implemented the circuit with Open Modelica like this: But the problem is that the R9 register is not having any voltage or ...
Knowledge Drilling's user avatar
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My Tesla coil is not working

I made a Tesla coil, but it doesn't not work. I used this circuit: I used 200 turns for the primary coil with 0.5 mm wire and 5 turns for the secondary coil with 1 mm wire on a wooden rod. Back to ...
PO12's user avatar
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Can you use any vacuum tube in a vacuum tube Tesla coil?

I'm building a vacuum tube Tesla coil (VTTC,) and although I have experience in SGTC (spark gap), there are some questions left unanswered. When picking a tube for your coil, does it matter which tube ...
Emil Adser's user avatar
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How do I make my Tesla coil more powerful?

I have built a spark gap Tesla coil. It performs pretty well, with 20 cm sparks, but I want it to perform even better. I use a really cheap mmc that I bought on eBay, and I was wondering if it would ...
Emil Adser's user avatar
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Tesla coil is arcing across the secondary

I built a spark gap Tesla coil and it works great but I have two problems. My secondary coils is arcing, from the bottom mostly, but also other places and it is damaging the secondary. Is there a ...
Emil Adser's user avatar
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Slayer exciter transistor troubles

I have built a Slayer exciter using a 2N2222, with a 22 kΩ resistor, as well as the other needed components. (4 turns primary, 475 secondary.) It works fine with a 2N2222, but I was wondering if it ...
BallerSicarius's user avatar
1 vote
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385 views

How to improve a Tesla coil?

I've recently built a relatively big Tesla coil. It is a larger version of the Slayer exciter but with 2 big MOSFETs. The same circuit, with a smaller coil produced small arcs without a top load, and ...
George Chita's user avatar
2 votes
1 answer
121 views

Should the top torus of a Tesla coil be cut?

Dosen't the top load torus act like one turn coil in short circuit? Doesn't it "steal" (decrease) the energy transfer to the arc? As a load, it has an inductive reactance (1 turn solenoid.) ...
Niculae George Razvan's user avatar
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Large series resistor to protect from shock

I built a high voltage generator and want to protect myself against shocks. Would putting a large series resistor on the powering circuit be sufficient to protect me in those cases: I build a large ...
JeanMi's user avatar
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Is it possible to operate a Tesla coil at lower frequencies?

Tesla coils usually operate at a frequency level between 50 kHz to 1 MHz. What if we use a frequency between 60 to 100 Hz? Will it work? What will be the effect on the spark?
Atul Futane's user avatar
1 vote
2 answers
766 views

Calculating number of turns an electromagnet has

The title, but can one calculate the amount of turns on a coil or find that out somehow? Because I purchased a 120m copper coil (originally intended on using it on another coil former before giving up ...
Thanos's user avatar
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Resonant RF transformer using a piece of wire (no capacitors)

I'm curious if it is possible to build a spark-gap Tesla coil without using capacitors at all. Basically, treating the primary and secondary as TX/RX antennas and cutting them to proper length so that ...
elgroovy's user avatar
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Why does my MOSFET keep failing?

I am using the IRFZ44N MOSFET for my slayer exciter Tesla coil. The primary has 3 turns and the secondary about 1000 turns. The high voltage output has no load connected, it's just dangling mid-air. ...
Harish's user avatar
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Slayer exciter doesn't work

I know that similar questions have been asked here, but none of the answers seem to work for me. Also, I am new to this site, and I am not much of an expert when it comes to electronics, so feel free ...
ductTapeIsMagic's user avatar
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3 answers
164 views

How exactly does a Tesla coil primary winding transfer energy to the secondary winding?

We know that the Tesla coil has a low coupling coefficient so most of the energy is transferred by using electric resonance. How exactly does it transfer the energy? When the oscillating magnetic ...
Atul Futane's user avatar
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1 answer
609 views

Tesla coil with flyback transformer and ZVS circuit

I am new to the field of electronics and I might have some wrong concepts. I was thinking of designing an old fashioned 'spark gap' Tesla coil. Materials I have: a flyback transformer a cheap ZVS ...
Scarlett's user avatar
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4 answers
921 views

Why is the primary of the Tesla coil placed at the bottom of the secondary?

The primary winding of the Tesla coil is wound around only the bottom portion of the secondary coil and in Wikipedia, they mention that this configuration illustrates the operation of the secondary as ...
Atul Futane's user avatar
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198 views

How to design a class-E amplifier with a more complicated load (tesla coil)

I'm currently trying to build a 4MHz Tesla Coil powered by a Class-E amplifier. I've managed to design and simulate such amplifiers with a load consisting of a resistor and a coil or a capacitor using ...
ismxy's user avatar
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Will overlapping a few wires on a Tesla coil affect its performance?

When winding my secondary coil I accidentally overlapped a couple wires (~10 out of 900). I know that you can't overlap wires because the voltage drops but is overlapping just a few wires okay?
HARISH RAM student's user avatar
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Secondary Coil Malfunction in an SSTC Circuit

I’ve designed an SSTC circuit which is based on a different topology and I wanted to accomplish it in real life. The circuit is operating at approximately 1.5 MHz during resonance and inherently, the ...
Karakoncolos's user avatar
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2 answers
721 views

Understanding high frequency tesla coil circuit

Below is a circuit diagram for a high frequency tesla coil circuit that I found on this site. L2 is the primary winding and L3 is the secondary. My understanding of resonant transformers is that they ...
Gearoid Murphy's user avatar
1 vote
1 answer
243 views

Tesla coil design: primary coil

Background info: I'm trying to create a spark gap tesla coil that uses a ZVS / flyback combo, and so far, given the initial tests with a 12 volt 20 amp power supply, I managed to get it to work, but ...
David Truong's user avatar
62 votes
3 answers
10k views

Is this video fake? I thought Tesla coils only worked on AC

This video shows a 9-volt battery connected to a wire as a primary. The first reason I think this is fake is that he is powering a Tesla coil with 10 volts. The second reason is that Tesla coils work ...
Gabriel ashmore's user avatar
3 votes
3 answers
966 views

What makes Tesla coils better than conventional transformers at generating high voltages?

The voltage gain of a Tesla coil can be determined from the primary and secondary inductances \$L_1\$ and \$L_2\$ using the following formula (Wikipedia has a simple derivation): $$ \frac{V_2}{V_1} = \...
a96d's user avatar
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What are the effects of small spark gaps on connectors?

I was reading about the '4th Pin' problem that effects almost all modern iPhone users. It is where the 4th pin on the lightning connector turn black and eventually will not work until it is scraped or ...
Liam Kelly's user avatar
2 votes
1 answer
1k views

IR2110 output voltage problem

I have been working on a half bridge Tesla coil circuit. In process of building the Tesla coil, I have come across some problems. First of all, I’m using the IR2110 gate driver IC to drive the MOSFETs....
Mr. Infinite's user avatar
1 vote
0 answers
609 views

How the feedback circuitry of a Tesla Coil works?

I have a project to do in school which is a DIY musical Telsa Coil and I need to build the hardware. I searched on the Internet and found these 2 schematics: My schematic is completely different from ...
El Kurshum's user avatar
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1 answer
282 views

How to bring a transformer's secondary impedance to the primary side with k < 1?

I know that when I have a transformer with a coupling coefficient of 1, I can use the formula Z' = Z × (N₁ / N₂)². How could I calculate this impedance with a ...
ismxy's user avatar
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Using 74HC14 to invert a signal for HIN and LIN pin on IR2110

recently ive been working on a sstc solid state tesla coil project.I am using IR2110 gate driver ic for driving my IRFP450 N-channel mosfets in half-bridge configuration.so the IR2110 ic have two ...
Mr. Infinite's user avatar
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1 answer
130 views

Slayer exciter not drawing from supply

I made a Slayer exciter according to the schematic below. I have done about everything necessary for it to work such as sanding the bottom of the secondary. I have 2000 turns on secondary, and 7 on ...
Comyar D's user avatar
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50 views

How to measure which spark gap is firing, in a type of Tesla coil, using an Arduino

Firstly, I am teaching myself electronics and do not know all the lingo at this point in time. With that said, I have conceptualized a fun(?) project in the back of my mind which consists of multiple ...
HappyCoder's user avatar
1 vote
1 answer
398 views

Using Circuit of Plasma Globe to Power a Tesla Coil

I had this old plasma globe laying around so I opened it up and found what I think is a ZVS circuit(I have ZERO knowledge of high voltage electronics and I may be wrong). I also have a wound tesla ...
DragonflyRobotics's user avatar
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389 views

How can I play midi on this tesla coil?

I've made several small tesla coils, however I wanted to buy one that was compact and powerful, so I bought this one. I'm assuming it is a drsstc, since it has a half bridge of mosfets or igbts, which ...
lostbeam488's user avatar
8 votes
7 answers
5k views

Why do single transistor oscillators work to power a transformer, if a transformer needs AC?

I have been making some high voltage projects lately, such as a spark gap Tesla coil, slayer exciter, and a flyback transformer HV supply. The flyback transformer uses a single transistor circuit, ...
lostbeam488's user avatar
1 vote
1 answer
70 views

Plasma damage to body cells

Can exposure to plasma or energy from Tesla home windings damage the body's cells? More generally, will the plasma or energy from the Tesla coil ionize?
Merlin's user avatar
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1 answer
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What happens if a small Tesla coil is fed with a powerful Neon-sign transformer?

It is typically recommended to use a big neon-sign transformer (NST) for a physically big spark gap tesla coil. Assuming the primary and secondary of a small tesla coil are tuned to have resonance on ...
rubund's user avatar
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3 votes
3 answers
364 views

Why does a Tesla coil secondary need intermittent excitation to achieve resonance?

I have been reading about Tesla coils and their principle of operation - if I have understood correctly - after the primary is sufficiently charged, its circuit is closed (by means of a spark gap or ...
rkourdis's user avatar
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Can I make a tesla coil with this setup?

I had an old plasma globe and I ripped it apart to find a flyback transformer and some other components. I am not sure what type of circuit this is but I want to make it into a tesla coil. I wound a ...
DragonflyRobotics's user avatar