The hit teams are moving in.

@@paulneilson6117 abstenerse los que no son técnicos...

I'm surprised he didn't lick it to check the o/p !

Yeah, that's always a plus.

Dc voltage don't give you a shock

Agree, but how do you think the transformer with the same number of turns in coils (for example 220 ~ 220) will decide the problem of the absence of galvanic isolation?

@@Amy_Price Yes

@@SaTor_RotaS_ =)

@@Amy_Price Yes, it's possible to use isolation transformer. The problem is that not everyone has one, and this isn't shown in the video to begin with. Otherwise it can be used to render this safe, as galvanic isolation is the one and only reason isolation transformers exist at all.

@@featheredskeptic1301 Exactly=)

cuidado, leete los otros comentarios porque parece ser muy peligroso. igual en mexico creo que tienen 110 volts

Даааа, херамента отличная 😁

Sabe como montar uma proteção? Será que já vem uma proteção nessa placa ? Vou analizar esse negócio.

Most of those inductors are just inductors, not transformers. You can see from the PCB trace bridging two terminals on the bottom that this is clearly an inductor or it's unquestionably being used as an inductor in a current mode buck regulator and it offers no isolation whatsoever.

да

This is a very risky device. When a breakdown occurs, or by mistake. A device for professionals. Personally, I don't like such things. When everything is OK 100% it works 100% To bardzo ryzykowne urządzenie. Gdy występi awaria, lub przy pomyłce. Urządzenie dla profesjonalistów. Osobiście nie lubię takich rzeczy. Gdy wszystko jest OK 100 % to działa100%

Why don´t you show us the best option in a video on youtube?

Hahaha. Can't be any worse than the cheap phone chargers. I am dubious

its a simple ohm law circuit you can make low voltage instead of 180 V and a resistance with a value correspond with a initial tested diode

@@algharibe could you make a video regarding that?

И что ? А гальванически развязанные не находятся под напряжением? Убивает ток, а не напряжение ! А ничего , что у него резистор стоит на 39 кОм ? Конечно не стоит с такой лабудой хвататься за батареи и прочие провода и ни чего не будет , а если вилку четко включать ,соблюдая фазу и ноль, то и за батареи и трубы можно хватать . А вам точно не стоит связываться с любым электричеством , с такими понятиями ,только батарейка и то одна, она точно развязана.

Ну всякое может быть для внутренней цепи может безопасно, вдруг летом потный и голый и и земляной пол в гараже не все же дома могут и все не убьет но нервную систему потрепает.

@@user-yx4vd3rb5i "Убивает ток, а не напряжение ! " 230v/10Ma или 12v/1A что опаснее?

MihaiTeSla мокрый , потный, с босыми пятками и стоя в луже , ещё и языком можно случайно зацепиться , некоторые с дуру и пиптик свой могут сломать . А если всё тоже самое, но с гальванической развязкой хвататься можно? Нервную систему не "потрепает"?

Краснодарский Электрик ой , как всё запущено. Беда. С такими вопросами надо вам не электриком Краснодарским подписываться , а доером или пастухом. Не позориться самому и не позорить профессию.🙈 Почему птичке без разницы на каком проводе сидеть 12В/1А, 220В/10 мА или 10000В/1000А , сидит себе пока не надоест и ничего ей не делается , ещё и поелозить на нем может ?

Как вариан ещё пересмотреть, где пальцами замыкает контакты. Стабилизатор тока на ~5 миллиампер.

@@Klivih Не стабилизатор, а ограничительный резистор.

@Bear Bear правильно.., как вариант тоже подумать головой что я подал идею.. И это не инструкция к действию.

@Bear Bear идею подал автор?!) Здесь автор просто скопипастил. В Ютюбе уже не раз подобное попадалось от других индусов. Ну это так, если ты не в курсе..

Можно поставить два ограничительных резистора по 20к, а не один на 39к и будет безопасно, даже без гальванической развязки. По одному резистору на каждый из выводов.

Интересная но стрёмная приспособа. Что бы при демонстрации глаза с орбиты на стол не выкотились.

@@user-li8kk6jx1u а коты тут при чем?

@@tankg4496 О котах не на этом сайте.

Кстати да, вылетит аж бегом. Стабилитрон в обратке-то является диодом и выживет, а вот светодиоды должны пошабашить, проверял-то он их подключив сразу правильной полярностью.

Да, полярность попутал, светодиоды выбросил.

O seu tá dando um pequeno choque nas ponteiras ?

6мА при выходе из строя драйвера светодиодки. Чуток ощутимо.

Нужно снять разделительный конденсатор.

Следить чтобы вилка втыкалась в розетку не как получится так ничего и не случится

Когда будешь испытывать не забудь ноги опустить в тазик с водой

Quando esse circuito entrar em curto, o multímetro vai pro beleléu

Sabe como montar uma proteção? Será que já vem uma proteção nessa placa ? Vou analizar esse negócio.

​@@Flavio.R.Coelho mas no vídeo ele fecha um curto nas ponteiras e a fonte " chaveada " desarma e volta após uns 2 segundos . Será que já não ajuda ?

Lo único que no entiendo es por que genera inicialmente más de 100 voltios y cuando pone la mano no se electrocuta

@@miguelveliz1911 en este caso lo agresivo, no es el voltaje, sino la corriente, y esta es del orden de los 50 mA si acaso.

Se puede hacer con cualquier modelo de multimetro?

I was thinking the same! Downvote is needed on this one ;)

KZfaq doesn't care about anyone's safety, just promoting more views.

I don't think it's an issue that it can deliver a shock, it's a hv tester after all. It would really be more useful if it could output higher voltage though.

I recommend to report these videos instead

Cool idea/hack/mod/repurpose. But, not cool that there were no safety concerns/considerations mentioned. But hey! If you, you alone want to play/work/experiment with electricity, you do so at your own risk. There is absolutely no excuse for someone who is able to watch this to say, "I didn't know." Didn't know what? How to use the device your using to watch this? An acceptable excuse would be, "I have no sense, thus is the reason I am poor in knowledge."

O resistor e pra nao passar surto pro multimetro assim o multimetro so faz a funcao de registrar a tensao em multimetro nao automatico sugiro utilizar 600 volts DC

@@juniorsantosjerry4188 meu multimetro não é automático, posso usar sem o resistor?

Conseguiu fazer com o circuito da lâmpada brasileira ???

Só que nao tem no Brasil esse resistor de cimento com esse valor

@@gabrielleperamosramos4128 sim pode

ES PELIGROSO

Só que nao encontro no Brasil esse resistor de cimento com esse valor

@@NoobMrAlex Coloca de outro modelo com o mesmo valor, pesquisa na shopee que tem

@@NoobMrAlex amigo no Aliexpress tem um monte de componentes.

@@NoobMrAlex solo coloca 4 resistencias de 10k 5wat en serie y listo allí ya tienes tu resistencia de 39k 5w , Yolo hice así 👍

O_o like it, i tired to repeat this ("on both tube...") in ru comments

Are you a pro?

If don't do this, then how would you build it?

@@jonschultz5210 It puts out over 180 volts DC. That can damage anything that you connect to it. You may find that after you test some part with it, the part no longer functions because it burned out the part.

Só que nao encontro no Brasil esse resistor de cimento com esse valor

peki bu ölçü aleti olmayan ne yapacak UT89XD her ölçü aleti parçanın voltaj degerini vermez kaldıki 220 ye taksa bile adaptör hemen bozulacaktır

I agree

I have read all the warnings but for hell who goes and only touches the electricity even if it is not dangerous so stop and give better suggestions instead

@@boukharitemessek2596 I think you’re trying to say something stupid, but I can’t even decipher that word salad.

Any safe alternatives? The function is quite useful but definitely don't like the idea of plugging in 110v AC into a multimeter. I'm a hobbyist so I usually stick with tried and true solutions. No need to let stupid do me in so late in life. I see plenty of similar videos like this and they all use 220v EU. Glad I stopped myself and read the comments rather than running out to make one.

It is not that dangerous if you place an XClass 2 mains cap in series with load.

It's fine. You just need to dip it in water first to keep it cool.

@@craigjensen6853 I have seen worse. I have seen better. But Is the glass half full or half empty?

@@trentjackson4816 it depends if you’re filling the glass or emptying it.

@@n578md2 no no no you see that is just an manipulated metaphor we have here. I will have to remember your reply. It is good ;)

no dejes de agregar el tema seguridad...

What setting is the diode tester? I never knew my multi meter could do this. There's a bunch of settings I dunno what any of them do besides Ohm and Voltmeter :O

1. It *is* isolated. Apparently you didn't watch closely enough to see the transformer. 2. Your multimeter will only work with LEDs that contain a single diode. Most LEDs in lightbulbs or strips contain multiple diodes in series within each light emitting package. This is true of ALL COB (Chip on Board) lights. The best way to measure the voltage required by series LEDs is to use a CC,CV DC power source set to a low Max Current (say, 10ma), then crank the voltage up until the LEDs dimly light. (CC=Constant Current, CV=Constant Voltage) And that is really what this device is doing. It is a current limited supply with a max voltage of ~185V. When anything plugged into it draws more that its fixed current max, it drops the voltage. The device has its limitations. The Constant Current is fixed, not variable.

@@chang.stanley Set your multimeter to 2000 Ohm range. If you meter has a 200 Ohm range, or a Diode Test setting, those will work for Silicon diodes, but not for LEDs, which are GaN diodes requiring ~3v. No range will work for LEDs that have multiple diodes per package.

I agree this device is not safe, but the diode test on a meter isn't always enough to test LEDs and won't test multi LED strips. An Isolation transformer would make it safer. Oh and LED's are current devices hence you need to limit the current to them.

@@chang.stanley The diode setting is the one with an arrow with a perpendicular line at the tip of the arrow. (The "diode" symbol.)

Он же тебе показал , что на выводах 183 v!!! И развязка есть- это импульсный преобразователь, трансик маленький присутствует!!!

@@1966pda Это не трансик,а дроссель.И убивает не напряжение ,а ток.Учи матчасть.

@@1966pda та хоть 0 там покажет!! Относительно земли там всёравно полное сетевое

Я воще ничего не понял. Там должно быть полное сетевое напряжение.

@@qwertyuiopasdfgghjkl9578 оно и есть там

Вот такие комменты ценны. Жаль что на 10й странице) 😁

yes... but where is >YOUR< video?

yea, you tell him.

Thanks!

​@@forward876Well, plenty of people found it useful.... and those who need an explicit video (and can't do basic internet research from Sky Sentinal's jumping off point), shouldn't be building a homemade mains connected probing device anyway.

more info please!

I work in the chemistry field. You learn rather quickly to use basic safety measures. Im fond of my eyes and hands and lungs and hearts and life in general. Finding good fitting googgles is harder than you might suspect. Comfy nitrile or PE gloves while not making it worse by sweating on your hands is an art. Latex based gloves with or without talcum, when Im around, they magicly 'disappear'. Better use a sandwich baggy with some saranwrap than a latex glove. NItrile is great most of the time but you must accept thats its transparent to many solvents. PVC based vinyl gloves with plastyisizers are possible the worst. PVC itself is a nasty materials when ending in the waste disposal, and the plqastizisers are not ok either. Just for fun leave a few of those vinyl gloves in ethanol/methanol and see after a few days what you end up with. Mislabeling is one those that are far beyond taboo. Similar level as fakinf data. Using a normal 240 AC connector, even as a part of an adapter for gods sake. At the very least put screaming fluor colored labels (covering the previous information) on the thing indictating polarity and write on the thing its an ongoing experiment. I like doing stuff on the edge, also with electro, but it sees that this person never has any serious incident or misfortune to hit home the bullshit this work ethic is showing. It might just be the crucial KZfaq vieuws, who am I to judge in the end. But blergh, gave me a crap feeling. If you must make money from youtube please state it in the extra info, akin this type of working is not goodpractice at all but I noticed that it gives me and my family a better income so I choose the last option. Im sure you will understand. Doing dumb shit in the private of your home is one thing, posting it online is another. I would still choose my family, so even if this on purpose. Hope you are doing well.

@@blueredbrick 👍👍👍👌👌👌 De VU2RZA

На такой плате драйвера гальванической развязки нет. Рисковый парень.

Оголённые контакты трогать нельзя. Особенно сырым руками. ОНИ ОТ ЭТОГО РЖАВЕЮТ! )) А без гальвано развязки (через самый простой транс 220-220) НИКАКИМИ РУКАМИ ТРОГАТЬ НЕЛЬЗЯ!

A sua tá dando choque nas ponteiras mano ??

I have no idea what they are doing or why, l can barely change a plug, in fact l always have to check instructions, something about electricity terrifies me.

I am being surprised at their still being alive ...

@@Baetzibaer why?? cuz they are smart

@@heyderaliyev8976 Making you think one is smart doesn't seem to require much smartness.

@@Baetzibaer Agreed. The guy is a dingbat at best - a non-isolated buck converter with a high-value resistor on one output terminal, that's as lazy as you can get without jamming LEDs straight into a wall plug! Could make a capacitive dropper do the exact same thing, and if you use two beefy resistors then at least there's a bit more than a diode or two between you and the grid! Best bet yet? get some small battery operated boost converter - or wind a joule thief with a 1:10 ratio secondary on it (step up transformer) - Rectify and smooth the output, and with a similar resistor (47K) in series with the test device. That would provide a battery operated version that is safer and far more stable...

Só que nao tem no Brasil esse resistor de cimento com esse valor

Não. O transformador do dispositivo inversor isola a rede elétrica. E a corrente é reduzida pelo resistor de 39Kx5W tornando infofensivo.

A corrente e de 30ma no maximo e um Testador e identificador de Diodos basicamente muito util e tvs de led e afins

@@Marceloalvesgodinho , это дроссель. В лампе нет гальванической развязки.

Esse reator também serve para testar os conjuntos de LEDs das TVs

@@TRuDoBoLeonid true.

Главное, не касаться батарей отопления, когда пользуешься этим чудом.

@@eugenyzv801 если трубы пластиковые?

@@Romankvтогда по-бороде!

привет любителям при работе погреть ножки на батарее xD

Go to your local Walmart or target and get one of the travel adapters. Boom, euro plug.

This circuit, i mean the PCB is very common with some round 18 watt LED lamps. Normally they fail and it has a 10 microfarad @ 400 volts that fail very frequently. I have seen varius manufacturers that use a 15 microfarad capacitor also. The circuit is supposed to provide 300 miliamps to the load no matter how Many LEDS You connect as the load.

If I wanted to construct this using 120v mains here in the US, what would the power resistor value be?

put it in a small box no touch problem solved

sir could you please entertain this question. Here the voltage varies with the load, is the current also varrying to maintain that 9W rating? PS: I have no prior education in advanced electronics and circuitry. Could you also guide me on where I can learn how complex circuits work, since I'm developing interest in it.

"But if you plug it in the other way around" // You don't need to. Both mains lines are connected via the rectifier to the negative line which is usually directly tied to the output.

very good idea but where to place the isolation transformer in this circuit and what kind would you recommend that is suitable for it to be safe?

@@boukharitemessek2596 Do what some others have suggested, scavenge two step down transformers and use the second one to boost the voltage back up. Then use a 100k 5W resistor to limit the current. Don't make the death trap in the video

Add an inline fuse of 500ma or less in positive test lead for protection.

я бы сказал практически все НЕ обеспечивают такой развязки. по той причине что не содержат в своей конструкции трансформатор.

Подскажите пожалуйста, а тот что на плате трансформатор, он не выполняет функцию гальванической развязки? Галь-я развязка, это передача напряжения с одной обмотки на другую через магнитопровод и с помощью магнитной индукции, правильно? Я самоучка начинающий.

@@80erter В большенстве схем что внутри лампы это автотрансформатор на 3 вывода.

@@80erter Вот в том то и ФИШКА что на плате НЕ ТРАНСФОРМАТОР !!!! Это накопительный ДРОСЕЛЬ . Там нет первичной и вторичной обмотки. Ты плохо знаешь схемотехнику подобных драйверов. Подобная хрень ОЧЕНЬ ОПАСНА. Если гипотетически сопоставить пользу от данной чепухи и вред который она может принести то здравый смысл подсказывает что ТАКУЮ ЕРЕСЬ ДЕЛАТЬ НЕЛЬЗЯ. а ютюб должен такие видео банить как ОПАСТНЫЕ ДЛЯ ЖИЗНИ

Sakin aldanma videoya. Çok ve çok tehlikeli, allah göstermesin çarpmak la kalmaz öbür dünyaya göç ettirir kardeş

Hazim Cali Çok tehlikeli olduğunun farkındayım fakat bu tarz devrelerle ve Voltajla çok uzun süredir aşırı aşırı olduğum için(Kendi adıma) korkulacak bir durum yok. Uyarın için teşekkür ederim

But What for? I do t see a practical use for this Op is telling us that this device tells us the power consumption/need of a simple circuit?

Надо выходной резистор разбить на два и поставить на оба провода, тогда будет не опаснее чем с разделительным трансформатором. Ну может ещё резисторы цепочкой набрать, для исключения случайного пробоя всех сразу

Foarte buna prezentare ! Hai sa o îmbunătățim ! Multumesc !

cuando sepas mas de electronica te daras cuenta que es una tonteria

а как это , по подробней можно ?