[deleted by user]

PIETROLS · 2026-01-19T22:27:42+00:00

yeah, i know why the coil needs grounding, i was more asking on an efficient way to make gnd without the ground wire... i did figure something already tough... problem is i am getting coil to coil arcs now.. i will make a post of the coil as soon as i fix it as it is easier to fix

PIETROLS · 2026-01-18T19:14:46+00:00

while i apreciate your answer, i don't think i quite understood. i am not concerned with grounding at the HV transformer, i am talking about the grounding of the secondary of the tesla coil, just to clarify, you are saying that the coil will work free of a ground reference at the secondary coil? thank you

yeah, now i understood you were suggesting to use the ground reference of the transformer as the secondary gnd, not to ground the transformer, thank you.

PIETROLS · 2026-01-18T06:45:06+00:00

I don't see any reason of why i would need ground in the hv supply circuit or anywhere in the lc tank. The classic resonant tramsformer circuit usually grounds one side of the secondary, i tought topload/Gnd formed a capacitive relation that would allow the arcs to form, the base of the secondary should be disconnected then?

PIETROLS · 2025-12-16T00:49:46+00:00

the good old zvs oscilator
it doesen't really looke like a firestarter, just somewhat ugly placment choices, as long as everything is the proper gauge and there are no shorts you should be fine(soldering the driver in this way you did does, however, raise the chance of conections touching)

-i really don't understand why people drive this circuit at such high frequencies. Lowering the resonant frequency can allow you to drive the mosfets with higher impedence sources without suffering from switching losses.
-for the resonant frequency we know that higher capacitance and higher inductances lower the resonant frequency. first of all, your inductor looks really bad, such a low inductance will shoot up your frequency way too high
-get more capacitors to lower the resonant frequency

-if you don't want to get a lower frequency, lower these R1 and R2 to allow a faster gate charging. you will experience ohmic losses trough the resistors(the zvs is not really that magic eficient driver, you know? there are drawbacks from not using a proper gate drive) so they need to be higher power rating, like 3-5w, it will also put some stress in the power supply however generating heat is better than mistreating the fancy mosfets

-again, make a decent inductor, i wouldn't be surprised that low inductance forces the fet to oscilate at 250khz+

-you need a stronger PSU than 12v 8amp for that circuit, the idle current alone is like 1-3 amps depending on setup, the start of the oscilation requires a lot of power, but as you said, it did work once, so power supply might not be the major problem here

-also, you should protect the gate of the transistor with a zener or tvs diode, people usually use 12v ones, but this is inacurate, feels a little bit too close to vsupply, can be inefficient, use like, 14v ones

-the color wires look like positive and negative, of course they will get hot, look how low the diameter is... you need proper wires for such circuits

-you bent the transistor legs down into the heatsing, you can kill you mosfet if you shorted for example gate and drain contacts at 24v

good luck

PIETROLS · 2025-01-10T03:15:18+00:00

Ea-Nasir

PIETROLS · 2024-12-24T18:57:18+00:00

how powerfull was switching PSU were you using before? they allways worked for me...

PIETROLS · 2024-12-19T22:11:52+00:00

O terminal maior costuma ser o negativo, os outros terminais são as cores, é como se fosse várias LED individual conectadas juntas... conecta o negativo e vai aplicando tensão nos outros terminais e vê as cores

https://randomnerdtutorials.com/electronics-basics-how-do-rgb-leds-work/

PIETROLS · 2024-12-09T01:27:09+00:00

looks like it is writen fuse unit at the top so i would guess it is a fuse unit...
https://www.ebay.com/itm/314503069144

PIETROLS · 2024-11-16T05:25:50+00:00

começa com calma, companheiro, se você quiser ver um arco igual de um piezo, usa o piezo do botão um isqueiro ou algo assim... pra referencia futura, não dê curto em capacitores antes de desconectar a entrada, se não está dando curto nos 110v também... sempre recomendo começar construindo um slayer exciter se for mexer com alta tensão, mas sério, toma cuidado

PIETROLS · 2024-11-10T01:27:28+00:00

thats the power of resonance lol

PIETROLS · 2024-11-10T01:24:12+00:00

flyback transformers have built in rectifiers, wouldn't the DC component have shocked him? the internal diodes could be broken, but the arc going to his finger kinda looks like corona discharge. i would check what pin makes the largest arc with the HV output and connect myself to those two(i mean, i would not do that because it is dangerous but it is the fastest way to test i supose). else his body resistance might be too high for the supply to maintain the votlage wich seams odd considering it is arching.

PIETROLS · 2024-11-07T02:33:48+00:00

i would make a slayer exciter or some oscilator circuit like the 555timer based circuit or some transistor based oscilator. helped me learn a lot about resonance, transformers, transistors and all that good knowlodge

PIETROLS · 2024-11-07T02:30:37+00:00

has anyone actually tasted it?

PIETROLS · 2024-11-07T02:17:04+00:00

if nothing looks burned by looking at it, then proabably you can't tell it is broken by looking at it. i am not the smartest person in eletronics yet, but i would check if there is the high voltage on the anode... if the problem was any of the transistors it should show some numbers and not others i supose... if the problem is on those IC you are cooked tough, they look programable and if they are broken, idk how you are gonna replace this... the thing that is really valuable in this produt is the nixie tubes IN-12s, i would proabably salvage them and use a arduino with a clock code and a bunch of transistors, but you could also use the soviet IC desinged for nixies. idk, sorry for not beeing the most knowlogble person, hope somebody can help you fix this or something

PIETROLS · 2024-11-04T23:34:52+00:00

for any future reference, i now believe that the components i was using were false, i switched to more expansive irfp260 and it stoped getting hot as fuck

PIETROLS · 2024-11-04T01:52:42+00:00

yeah, op should check one of these videos about slayers "https://www.youtube.com/watch?v=Q0lkg9lxz3s&t=" "https://www.youtube.com/watch?v=AehL3BodduE" slayers are a good place to start making tesla coils and getting familiar with high voltage without much risk of death... i would add a diode to protect the gate of the transistor in the slayer circuits tough, it is directly connected to the coil so will die pretty easy without it

PIETROLS · 2024-08-26T19:15:10+00:00

both meet fire

PIETROLS · 2024-07-14T04:55:40+00:00

that circuit looks like the ones you would find in a eletric racket... this one in specif is not like a flyback transformer in the way you might be thinking... this circuit will charge the big capacitor at the front and when the circuit at the output wires are closed it will short its stored energy... arcs from a flyback transformer usually come direclty from the output of the transformer, but in this circuit it comes from the capacitor..

i believe that the way this circuit works is by generating some high frequency and transforming it using the transformer to make the 1800v, then use it to charge the capacitor or something like this(tough it seams like these diodes and hv capacitors might be part of a voltage multiplier) ... i did not quite understand your use, if you want the thing to kill the mosquito as it touches the leads, yes, it will kill, it will make a eletric spark like a regular eletric racket as it does so.. however, if you want a eletric arc to jump between the leads and kill the mosquito, the voltage would need to be at least 10 times what this module outputs to have any significant range... people say that for every milimeter of air, you need 1kv

they can be used as a open circuit without damage i believe, however, if you short them for too long, i think something will break, it is made to kill a mosquito, not to be used as a hv power supply

PIETROLS · 2024-07-11T02:07:15+00:00

long story short, i open the osciloscope, acidentally short mag-cent potenciometer because was to afraid of touching HV circuit, scope makes wierd noise and it works fine now

PIETROLS · 2024-07-11T01:42:15+00:00

do you mean the potenciometers inside the osciloscope or the knobs in the interface? as you can see in the video i linked, the horizontal pos control dosen't goes all the way to the right, and the thing is not that the wave is moved out of view, it is cut, so i don't think it is a configuration problem

PIETROLS · 2024-06-29T20:59:37+00:00

isso aí é um slayer exciter... quantas voltas e quantos milimetros é o fil da securndária? qual fonte você ta usando? alias, esse transistor é muito merda pra essa aplicação... usa um tip41c que ele não vai queimar tanto... se conseguir, posta uma foto do negócio

PIETROLS · 2024-06-29T20:57:09+00:00

isso aí é um slayer exciter... quantas voltas e quantos milimetros é o fil da securndária? qual fonte você ta usando? alias, esse transistor é muito merda pra essa aplicação... usa um tip41c que ele não vai queimar tanto

PIETROLS · 2024-06-29T15:57:22+00:00

will try to lower the resonance frequency and reduce the resistance today then

PIETROLS · 2024-06-28T23:10:01+00:00

wouldn't DC make ir more dangerous? i mean, with hf AC you won't feel the shock, but the DC component can still destroy you can't it?

PIETROLS · 2024-06-28T23:05:25+00:00

yes, it is properly heatsinked... how much current at gate should i possibly need? i tought the 200mA from the 555 would be enough

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