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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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Wireless Electricity Transmission model not working. Why?

I made wireless electricity transmission model using the principle of magnetic inductive coupling to transfer electricity between two separate coils. The model is very simple, known to everyone and ...
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4answers
1k views

How can I safely determine the output voltage and current of a transformer?

So I am building a Tesla coil with my partner for a senior design project. We safely ripped out a transformer from a microwave oven. However, after a good amount of research, we were unable to find ...
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52 views

Mini slayer exciter (tesla coil) not working

I recently built this tesla coil, and I've tried many different setups, but for some reason, I can't quite figure out why it won't work. simulate this circuit – Schematic created using ...
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46 views

Tesla Coil / Slayer Exciter won't work

I need some help with troubleshooting a slayer exciter circuit or coils. I was following this youtube tutorial and doublechecked all the connections. The power supply I use is 12V 1.5A. My secondary ...
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4answers
882 views

Is it possible to measure lightning discharges as Nikola Tesla? [closed]

Nikola Tesla stated in his patent, Art of Transmitting Electrical Energy Through Natural Medium, that he used sensitive instruments to measure lightning discharges: In the course of certain ...
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43 views

Tesla coil circuit troubleshooting

Ok so we are making a tesla coil. Here is the circuit diagram we are referring: Now it worked when we first made this. The light bulb lights bulb when we bring it near to secondary coil. Then we ...
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1answer
58 views

AUX input or microcontroller in a musical tesla coil?

Alright so I am making a musical tesla coil. I have seen some online tutorials and what I noticed is that some people are giving the audio input using a microcontroller and programming it to produce ...
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52 views

Circuit simulator for a musical tesla coil?

I want to make a musical tesla coil. But I want to do some experimenting with the values of the voltage, turns ratio and the audio input. So I need a circuit simulator so that I can fixate on what ...
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66 views

Which is the suitable toroid ring to wind the gate drive transformer of a SSTC?

I found this “ferrite” (i’m not sure if its ferrite) ring from a SMPS. A choke, to be specific. It’s made of black- grey, very hard, brittle material. Lower density than a solid iron ring. Is it OK to ...
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3answers
91 views

Where does the other end of the secondary in a solid state tesla coil connect?

Yes, i know it's a very elementary question, it's my first time build. All circuits shows that the not- sparking end of a sstc is connected to ground, but exactly where? do they mean the LITERALL ...
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1answer
109 views

Does the lack of a primary DC blocking capacitor cause my tesla coil driver to explode?

Lately I've been tinkering with an SSTC half-bridge driver. I've ran a couple of tests using relatively low input voltages ~50V and the IGBTS seemed to do fine, there was no noticeable heating at all. ...
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1answer
456 views

Tesla coil troubleshooting help

I'm trying to make a Tesla coil with approximately 200 turns in the secondary coil using 28 gauge enameled copper wire. My primary coil has 3-6 turns with a thicker wire. I've made all the connections ...
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1answer
187 views

Tesla coil - my primary circuit doesn't work

I would like to make a Tesla coil, so I bought a 10 kV 120 W 30 mA neon sign transformer from Aliexpress. First potential problem, while playing with it, I noticed that when it stops ...
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63 views

Capacitors discharging into Coil

I have 2 capacitors charging in parallel and then switching them in series to discharge into a wound coil of known inductance. My capacitors are 4nF 2000V and the charging voltage is 1000V. So at the ...
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1answer
57 views

Inductive Charging 2 layer coil transfer to 1 layer receiver. Any issues?

I am looking to incorporate a inductive charging mechanism into a project I’m working on. On the receiving side I only have room for a single layer coil design. For my transfer side I have more ...
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1answer
83 views

Interrupter on induction heater

Im currently trying to control the power of my induction heater, i want to use an interrupter to control it. but if i now interrupt the driver at random points, the mosfets wont turn off at zero ...
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35 views

Low Voltage Marx Generator Switch

I have a low voltage Marx generator which is connected to a coil inductor, eventually forming an LC oscillator. I want to find a way to switch the circuit on, but because the voltage is low I cannot ...
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2answers
221 views

Slayer exciter with darlington pair

I've been playing around with the well-known slayer exciter, and trying to make a tesla coil. The standard 1 transistor setup works fine for me, but the arcs I'm getting are pathetic, and it can ...
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66 views

Measure if Tesla coli is safe

I am planning to buy a Tesla coil from Alieexpress. When it arrives I wonder what are measurements I could take to make sure iit is safe. For example: how/where can I measure if the primary coil and ...
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1answer
273 views

Tesla Coil Troubleshooting Help! [closed]

A couple weeks ago I decided to build a tesla coil and after a decent amount of research and building time the coil could only light up a light bulb. I have tried many things to fix it but all to no ...
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1answer
65 views

Tesla coil, where do the sparks from the secondary coil ground to?

This might be an obvious question, but I was wondering how a Tesla coil emits sparks that's seem to complete a circuit in thin air, and how one end of the secondary completes a circuit with the other ...
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2answers
261 views

where is the closed path in tesla coil?

I saw a bunch of videos about Tesla coil which works on like an air cored transformer producing high voltage but could be figured it out how exactly it works I mean if we bring a tube light, lamp then ...
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1answer
209 views

Questions about Tesla coil (SGTC), spark gap and resonance

If I use a step up transformer (flyback for example) for primary to boost the voltage to 10 kV which (flyback) has a resonant frequency around 30-50 kHz, and the primary coil has a res. freq. of 500 ...
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1answer
168 views

Spark Gap for a Tesla Coil with 9-18v battery

I’m working on a university project where I’m building a modest tesla coil formed by a 20cm length secondary and a primary of five loops around the secondary. I need to make a spark gap in my circuit ...
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3answers
81 views

Is it feasible to make a musical tesla coil [closed]

Ive built a couple tesla coils so far, both a slayer and a spark gap (nothing overly complex). I'm still a student so I dont know a ton about electronics but I have a decent foundation. Has anyone ...
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1answer
298 views

Need a little help with a Chinese tesla coil

I bought a little tesla coil kit that can play music. I soldered it all up, and a friend of mine distracted me at the last second when I was hooking it up... I blew the original "BD243" transistor up ...
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1answer
436 views

Can the primary coil of a Tesla coil be inside the secondary coil?

I'm building a Tesla coil and the secondary coil (about 800 turns of 0.85 mm diameter enameled copper wire) is wrapped around a cardboard tube (about 8 cm diameter and about 1 m long). I was planning ...
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1answer
321 views

Voltage through resistor connected to tesla coil

I have been reading up about tesla coils and wondered what happens in a tesla coil circuit. If I have a tesla coil producing around 40KV in close proximity (around 10mm spark gap) to a metal pin ...
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1answer
669 views

Slayer exciter not working help

I recently made a slayer exciter by using the circuit diagram attached. But my exciter is not working and I have a question. Is primary coil supposed to be wound the opposite direction as second coil?...
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1answer
471 views

Slayer Exciter - Upgrade

I've built slayer exciter without LED. I was wondering if there is a way how to lighten a bulb without touching the secondary coil first. Also I was interested in how could I "upgrade" this slayer ...
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1answer
106 views

How should you position two flat-wound spiral coils for the best coupling?

I created two flat wound-spiral coils (also known as bifilar coils). The transmitter coil I made with an outer diameter of 10 inches and an inductance of 3 mH. The receiver coil I used a much smaller ...
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1answer
76 views

Is there a specific name for this phenomenon?

In my Slayer Exciter circuit, the current from the battery flows into the primary coil (with four turns) and therefore, a current is induced in the opposite direction in my secondary coil. This ...
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3answers
339 views

A problem regarding my Slayer Exciter circuit?

I have made a Slayer Exciter circuit for my school project. I'm going to be assessed on it. Now, it works just fine. But if I have to light a tubelight or something, I have to touch the terminal to ...
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1answer
2k views

How to use zvs driver to power tesla coil's primary

So, i am thinking about making my own crude tesla coil which would work upto 30volts. I got a zvs driver for that purpose. The zvs driver has 3 output lines( 1 positive and other 2 ground). Most of ...
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1answer
234 views

Tesla coil secondary wire problem [closed]

I'm making a small Tesla coil and I need to add some wire on the secondary coil because the one I used is too short. I have 2 wires with the same length. Can i add them to the first? If i do this the ...
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1answer
373 views

slayer exciter(tesla coil) circuit modification to allow better audio input

So I have the circuit working with a kit but the only thing is the audio aux has this offset voltage or some high voltage output I suspect. So when I plug my phone to the tesla coil through the audio ...
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91 views

Suitable Capacitor

I am wondering what voltage rating I need for the capacitor in the attached circuit. Its basically the front end of a Tesla coil. The voltage source is a neon sign transformer 3kV open circuit at up ...
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3answers
1k views

How can we measure the voltage at the coil of a Slayer Exciter?

How can we measure the voltage at the coil of a Slayer Exciter? We have built a simple 9V Slayer Exciter for a school project. We are examining the conservation of energy at the transformer. The ...
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2answers
2k views

How does this tesla coil design work?

Those mini tesla coils were always interesting to me, as they can be battery powered while still producing voltages well into the 10kV range, which lights up fluorescent bulbs and destroys electronics....
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264 views

Circuit analysis of a spark gap

I am confused about the action of a spark gap. I realize the gap is breached when the voltage reaches a critical point. But what happens to the remainder of the voltage? In the attached circuit the ...
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0answers
93 views

Tesla spark gap causing touch lamps to turn on

I have a mini DIY Mini Tesla Coil Kit 15W Mini Music Tesla Coil Plasma Speaker and have noticed when I play various "complex" signals using it, it causes my capacitive touch lighting on the ...
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1answer
200 views

Extending length of wire where the spark is produced on a mini tesla coil

How can I extend / increase the length of wire where the spark comes from on my mini musical tesla coil? See my mini tesla coil below along with the quick connector I'm using to extend the wire with. ...
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2answers
119 views

Bulk Rectification Capacitor Exploded on Tesla Coil Halfbridge

I have been troubleshooting a clicking noise on my Tesla coil driver that causes the system to stop working if my AC line voltage got to high (80V when system is designed for 120V). Suddenly one of ...
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2answers
371 views

What is the point of an LC Circuit in a Tesla Coil?

In a Tesla Coil, why does the Secondary circuit need the high frequency of the Primary LC Circuit? How come it doesn't work with the frequency of mains power? I'm aware that the LC Circuit resonates ...
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2answers
761 views

Spark Gaps on a Tesla Coil

I understand the point of an LC circuit in a Tesla Coil: add an increasing amount of energy to the circuit with each cycle in resonance, but how does the Primary Coil complete this? Specifically, I ...
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1answer
692 views

Vacuum Tube Tesla Coil (VTTC) schematic interpretation

I'm quite new to the Tesla Coil stuff and I want to build a VTTC form a GU-81 tube. I'm using schematics from this Instructable. I don't want to make anything I don't understand and although I ...
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1answer
341 views

Isolated Gate Driver Consistent Failure

I have a Tesla coil driver, designed around a UCC21520 isolated gate driver. It is operating as a fixed 50% duty cycle half bridge switcher. The frequency is varied from 150kHz to 250kHz. It is ...
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2answers
210 views

How can I preventing sparks from a plasma tube arcing onto electromagnet

I'm building a very small version of this it's a Plasma tube with an electromagnet (the two red coils) wrapped around the tube see link or image below. I want to send AC and DC Signals into the ...
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2answers
383 views

Why are sparks coming out of the bottom of my Tesla coil secondary?

I built a very basic tesla coil and I'm getting sparks out of the secondary bottom instead of the breakout point in the top. The bottom of the secondary is not connected to anything. The top is ...
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1answer
762 views

Is it safe to touch 1000 Volts DC at 1 mA of constant current? 0.1 mA? 0.01 mA?

I would like to study the phenomenon where thousands of volts are safe to touch. Generators like Tesla coil and static electricity generators generate discontinuous sparks, which is why they are safe ...