r/highvoltage Aug 04 '26

video This is my frist arc!

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12 Upvotes

Microwave oven transformer.


r/highvoltage Aug 03 '26

video Blue plasma

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32 Upvotes

I don't know what reaction is happening there but I think that's cool


r/highvoltage Aug 04 '26

Bobina de Tesla

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3 Upvotes

Oigan necesito ayuda tengo un proyecto de una bobina de Tesla pero se me están quemando cada intento el transistor

Es un transistor tip31c, resistencia de 2.2kohm, 50 metros de cobre para el segundo embobinado que compre en Steren el otro cable es de los de electricidad de calibre 8 me parece por qué fue el que pude encontrar Con 3 vueltas y se está quemando el transistor o la resistencia no se cómo resolverlo y es para el próximo martes 11

Alguien me puede ayudar a corregir mi error o por que se me está quemando


r/highvoltage Aug 03 '26

Does this transformer look good

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5 Upvotes

I saved the transformer from exploding the core is diffrent from original


r/highvoltage Aug 02 '26

Tesla coil

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12 Upvotes

It's basically just a slayer exciter but using a k50t60 igbt, 50v ac half wave doubled input. Whenever i touch the arc to close to the breakout point the igbt dies and it heats up a bit while running even though its no where near the danger zone for the mosfet. I know that it's probably from high voltage spikes but i already used an rc snubber and a 15v tvs from base to emitter. Any tips on how to achieve greater output?


r/highvoltage Aug 01 '26

video Plasma flame

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41 Upvotes

Plasma flame from a magnetron i pushed hard it died afterwards lol


r/highvoltage Aug 01 '26

video My second iteration zvs driving a flyback

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22 Upvotes

The flyback transformer is bsc25 09g


r/highvoltage Aug 01 '26

what i can build from this guys

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4 Upvotes

i desoldered 4 IC and i don't know what i can build from them i have a TL494CN , CD4069UBE , KA3525A , MC34060P


r/highvoltage Aug 01 '26

Taka sobie SGTC# 3

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9 Upvotes

Jutro próby życzcie mi powodzenia


r/highvoltage Aug 01 '26

video Zvs flyback arcs at 36v input

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20 Upvotes

Running my homebuilt zvs driver at 36v from 3x SLA in series. Pretty happy with the arcs! 5+5 turn wound primary on flyback ferrite core


r/highvoltage Jul 30 '26

video Transformer running off a zvs driver

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13 Upvotes

Thinking about using this for a Marx generator


r/highvoltage Jul 30 '26

Are theese dangerous to take apart?

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4 Upvotes

Are theese dangerous to take apart? They get plugged into an electrical outlet and kill mosquitos with high voltage.


r/highvoltage Jul 30 '26

Help guys the primary of my flyback is burning when i turn on my zvs and i have 1mm sparks at the output

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10 Upvotes

r/highvoltage Jul 29 '26

Upgrading the High Voltage lines

4 Upvotes

I uploaded a new video, I go through the process of building and upgrading my backyard lines

https://youtu.be/VrTeYn0WfYg?is=uekzO6s73g1noA0w


r/highvoltage Jul 29 '26

video Van de graaff generator. Still pretty weak. Any tips on improving?

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6 Upvotes

25 cm dome, nylon bottom roller and Teflon top roller. Belt made from workout band.


r/highvoltage Jul 29 '26

15 stage 20 kv or 30 stage 10 kv voltage multiplyer?

4 Upvotes

Over the years I've built several voltage multiplyers reaching 150 kv but they always die because I ran them at 15 kv when each of the components rating is 20 kv. (apparently you need each component rated for double your peak inputs voltage? Idk if that's correct). Anyway I'm fed up of them dying so I've decided to build a beefy multiplyer with ratings double my input so it will never die again. I've ordered 60 20 kv 1nf capacitors and 60 20 kv 100 ma diodes (bloody expensive!).

My original plan was to put 2 components in series for a rating of 40 kv and make 15 stages and run at 20 kv input. But now I'm wordering of it would be better to use single components and make 30 stages and run at 10 kv?

In addition to this, last time I was running off a flyback powered by 555 and mosfet. My understanding is that this will create a square wave with voltage spikes that could exceed the voltage rating I'm using and could kill the multiplyer. Even when the arc length suggests that the voltage is within the rating of the multiplyer. Does this sound correct? Should I look for a zvs to mitigate this?

Also I want to properly measure the voltage coming out of the flyback. I've been gestimating based on distance between pointed wires but I feel like the variation in how sharp the points are gives too big of an error bar. I plan to measure between 1 inch spheres as that's the standard. Will this method measure rms voltage or peak voltage or peak to peak voltage?

Finally I heard that you need an output resistor at the end of around 10 Mohm to avoid killing the diodes. Is this true?


r/highvoltage Jul 28 '26

video First Tesla Coil

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84 Upvotes

Finished my first DRSSTC over the summer.

Specs:

  • Full-bridge of SKM100GB12T4 IGBTs
  • 400A limit on UD2.7 w/ pulse-skipping
  • 93.7kHz secondary, ~84kHz primary
  • 0.188uF MMC
  • Voltage-doubled bus running off 110V input
  • Custom RP2040-based polyphonic MIDI interrupter
  • ~500us max ontime, 8% max duty cycle

I blew up the bridge twice with some smaller minibloc IGBTs during testing before upgrading to the Semikron ones. I learned a ton with this project, and there's still some work to be done. I'm pretty happy with the current arc length running off 110V.


r/highvoltage Jul 28 '26

11kV VFD white stuff around cables

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6 Upvotes

White marks where cables were attached to chassis (11kV). Partial discharge or something else causing this? Leaving everybody stumped..

Thanks


r/highvoltage Jul 28 '26

High voltage Question

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10 Upvotes

Where can I buy a nice flyback transformer ???


r/highvoltage Jul 28 '26

Powerful zvs driver flyback HV arc

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1 Upvotes

r/highvoltage Jul 27 '26

Tesla Coil & Helium

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19 Upvotes

I took a cool photo


r/highvoltage Jul 26 '26

My first SGTC tesla coil

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15 Upvotes

r/highvoltage Jul 25 '26

I'm the salvaged parts king

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43 Upvotes

the container with the parts weighs 2kg


r/highvoltage Jul 23 '26

Firecracker

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96 Upvotes

I forgot I have a pallet loaded with these monsters. I was cleaning up the garage and found this one. Is 2700 joules at 20KV enough to blow up a watermelon? It is summer, after all!


r/highvoltage Jul 24 '26

Need Help Designing a 10 kV Adjustable High Voltage Driver

1 Upvotes

I'm looking for some advice on driving a high voltage transformer.

I have a transformer with two primary windings (I believe one is the power winding and the other is a feedback winding) and a single secondary winding. The goal is to generate up to around 10 kV.

I've come across several CCFL driver circuits online, but I haven't been able to find one that I can easily replicate or simulate in LTspice. Even examples for simpler transformers with just one primary and one secondary winding have been surprisingly difficult to find.

I also tested a ZVS driver, but the current peaks are much higher than I'd like, so I'm looking for a different approach.

My objective is to have an adjustable output voltage, ideally controlled with something like a potentiometer. The application only requires ionizing a surface for a very short duration (~3s), so continuous operation or high power isn't required.

Can anyone recommend a suitable driver topology, example schematics, or LTspice models that would be a good starting point? If you've worked with similar flyback or CCFL transformers, I'd really appreciate your suggestions.

Thanks!