My DIY welding inverter (made of scrap) 

I thought this cant get better, then I saw the welding mask :D

Not dodgy. Handmade.

Just had to take the time to say how much I love your videos. It took a little time to get used to - but you are now firmly in my absolute favourite list. (which is a small precious list). A great mix of humor and knowledge delivered with a unique style.

This is the kind of skill i'm looking for, not needing many specialized machines to make it work. Kudos from India

Now that's recycling!

Wow. Can't say I have seen anything that dodgy in a long time. Great to know it actually works. Show us the welding bead it makes.

I literally can't wait to see the final version of this welder circuit....I hope you do it very soon!

I followed your instructions and now I've welded my hand to my face. Did I get a step wrong?

Thank You Man. I am so grateful that people like you are out there serving knowledge and granting their wealth mercifully. Keep going please.

Please do a video on the IGBT gate transformer and related circuit! Another awesome video thank you!

Wow, big respect for that engineering!

Man oh man! Nothing better than a temporary solution that turns permanent. 😁👍 I wish I could find a way to easily ship things to you from the usa. There have been dozens of times over the past few years where I wanted to ship you something after one of your videos. A buddy of mine runs a local industrial scrap yard and he gets welders and stuff by the truck load. You wouldn't believe the government entities and big companies who just scrap everything after one big job is finished because it's cheaper to write it off on their taxes. Literally stuff that is less than a year old. It makes more financial sense for them to crush it all at the scrapyard then to try and sell it or whatever. They Don't really allow the public to come in and buy stuff but I go by there a few days a week and he lets me have whatever for about $0.08 per pound no matter what it is. I used to be thousands of pounds of stuff every month sometimes thousands of pounds per week. And it went on like that for the first 2 or 3 years. But it's been 6-7 years now... And you just can't do that constantly you just can't keep up with that pace. It's more than a full-time job and then you end up realizing you don't get to work on projects because it's a full-time job keeping up with all of that stuff He doesn't keep anything anymore he just crushes at all unless I want it. a lot of the government stuff it comes in has to be crushed because it's a mandatory things since it was bought with taxpayer money. But I still get whatever I want and a lot of times donate it to schools and stuff like that when I find someone looking for something, or really need it, or I have the time. But it's a full-time job and I just don't have the time. You can only use so many things. And you can only have so many storage buildings. Then....If you can't find something when you need it or easily get to it.....then you might as well not have it at all.

Nothing new to me, since I've went over your site left and right MANY times :) Just nice to see the old beast in action. I have to calm down a bit, 'cause I tend to get paranoid when I build some high frequency high power circuits, you literally cobbled it together and it works juuuust fine :D

one has to appreciate what an honest down to earth person you are. Much respect, from a fellow electronic engineer..😀

This is the best video so far... Please more videos like this about things you have made.. Long time no cat 🐈 😢😭😭

For some very strange unexplainable reason, you can listen to this guy all day. like a damn twilight zone of hypnotic sound. DiodeGoneWild my foot. this guy is crazy smart gone berzerk. knows his stuff....

OMG, this has to be the most impressive project and the best video I have seen on RU-vid. Even without the cat.

I hope that one day you will find the motivation to put it in a nice box and to compleat it.🙂 And also a nice vid.

When you said there’s no motivation to finish it when it works and a temporary solution turns permanent… Story of my life. Happens with 99% of my projects lol

I like your messy design,your brain is full on expert and knowledge

MacGyver: How are we going to create a rocket launcher for this minivan without anything to weld it? DGW: Hold my beer...

It seems like you make prototype things I enjoy watching your channel

ok... ok... your suppressor broken and then you build a welder, and a welding mask to fix it! Big respect! Thanks DiodeGoneWild for very detail explaination!

Man, you have gone crazy big time 😂😁 You EVEN BUILT A SWITCHING auxiliary ps haha.. I am sure that out of 1000 people, 999 would have just dropped in a low dropout linear regulator IC but not you 👍👍😊 ps: pls show the bead you have done on the exhaust pipe haha

That’s awesome Dan!, love it, looks like something out of the apocalypse.

0:25 Excellent schematic! Your work is brilliant!

I would imagine even with your deep understanding in electronics, it would have been created in blocks. Making each block perform as expected, then matching it to the next block. It's still very impressive, even ten years later :-D Hope you fixed the exhaust, exhausting work :) The sub 17v supply looks like it has a "Top" chip or similar, it's amazing how minimal the circuit can become :-). I have been to your site quite a few times, you did build a power supply that was massive, or perhaps it was a welder, my memory is bad. Some of the small supplys i have saved the diagrams, just for personal use only. The section on p.c switchmode diagrams is very handy for reference.

It would be great if you show all your old stuff, like the tesla transformers. Your website is amazing.

It is now official, Diode Gone Wild is the finest electronic engineer on RU-vid...Yes, smarter than him too.

Surprisingly, he seems to be still alive to this day!

welding mask is the best. :-)

Diode, I was recently transiting through Czech Rep. and I swear, half of the cars on Your roads are Škodas 😂😂

Looks amazing, thank you for your content.

Please make a video how to build a simple smps inverter. You're absolutely expert in it.

Love you videos, been watching a lot of them and liking a lot of them lately. I believe this the first one I am commenting on. But I wish to see you redo this and on a nicer PCB layout (maybe professionally printed). Would really like to see this in that housing you drawn 😂

awesome! i read the article number of times years ago - it helped me to understand magic inside these electric machines. i can also recommend the switching PSUs topologies articles, good stuff there...(so far czech only)

LoL, this one is your best video. You are now in my personal hall of fame.

Skills and spirit, well done, sir!

Cool ... now I am going for that schematic; understand and try one myself ... great video .. cheers :)

Now this is the kind of construction I use in my electronics projects! But like I always think ... if it works, that's good enough.

Nice construction haha! Hope sometime in the future you get to fit it inside a proper metal container.

you really know your stuff. really impressive. keep up the good work.

You have real sick frankenstein engineering skill. Waching you touching contacts with bare hand also makes me nervous though I'm sure you're aware with the dangers but it just doesn't seems as safe..

wait,what?! Danyk? you must be,I'm not mistaking you. I saw the actual schematic,and post on your website! thank you very much!

DiodeGoneWild , Waiting for next steps, Thanks For Your Efforts

Awesome! Thanks for sharing! You have built some amazing stuff on your website, please share more of those projects! :D

Wow I'm making a digital bench power supply out of scrap currently! It's really cool to see a welding power supply made from scrap!

Not just impressed with your delivery, but empowered that it is possible. So.... All things are possible Great DGW.

Bloody Hell. Best wishes from Northern Ireland.

Most people don't know that car exhausts corrode from the inside out. That is to say that the metal actually becomes effectively thinner and weaker, hence it breaks. trying to weld them back up is only likely to last for a short time ( I have done it too). You will find the metal is effectively perforated, and the weld "pool" just runs away getting larger. and not where you intend it to be. You'll make more new holes than you started with and you may end up junking the pipe instead of fixing it. But good luck in any case.

maybe make some video to explain more in detail how it works (gate driving circuitry, the transformers, the type of ferrite, ecc), it would be interesting!

Excellent video 👍

To vyzerá ako výborná zváračka. Teda až na to nepraktické vymieňanie zváracej elektródy :)

Hi, about that glass… don't worry about UV. Silicon oxide glass can't pass it; for lab uses when UV is necessary, lithium dioxide is used. So even a piece of window glass thick enough would suffice.

"This the kind of temporary solution which over time turn into a permanent solution". Yep. I know it wery well. I call it a definitive makeshift.

Ah man I love this channel, the welding mask really got me laughing "frrrrom shoesssss". Hey if it works it's fine! Keep up the content :)

Takhle má vypadat baslt :) Super video. Nenapadlo by mě, že invertor je takhle jednoduchý.

there is the electrolic capacitor for smoooooothingggggggg take my upvote

You are awesome! How do you do the varnish coated wire for your transformers? I've managed to salvage some wire for rewinding once but most of the wire I've come across is not good enough for rewinding. The varnish tends to be brittle and crack after removing it. To answer everyones first question, yes, I very carefully remove the wire. I'm usually counting windings as it is and will carefully unwind and rewind at the same time or will wind it onto a fresh bobbin. The wire usually looks fine as soon as I remove it, but after letting it sit for a few days I can see small cracks showing tarnish from bare copper. Are you sourcing new copper wire, coating your own, or are there other sources of coated wire I should be looking for? -Jake

Thank goodness I found your channel۔ love you

Neat. I have seen many of your previous projects on your other channel, where you speak Czech. Many of them are quite interesting, I think.

awesome piece of equipment :D

Nice build! I made one of those with only a transformer. I wound 750 turns of primary and 20 turns of very thick wire as the secondary. The only downside is that the secondary melts after long usage.

Functional but very dodgy. Fits the channel exactly. I would like to see footage of it running.

You are very talented!

Fabulous! I want to see your car from every angle possible with proper zoom ins and outs :)

I've gotta hand it to you.... perseverance to sit and wind all the coils. You're proud of them I can tell, and so you should be. I was surprised to see an iron lamination transformer in the output. At 40khz switching, that would be inefficient due to eddy current and hysteresis losses. And it's very heavy. The choke at 40khz would be a similar problem with the bh curve characteristics of iron. The output transformer then looks more like something designed for 100hz, 1khz, 10khz maybe. Please cover the capacitor bank. The charge energy in there is significant and deadly. :) gm2020 . Edited: I saw on ur site, it's not iron laminated output transformer. The two big ferrite cores are impressive. :) Good answer given as to why DC rectification is used with inverter welders - yes the inductive reactance in leads at high frequencies! All around real nice, but a bit on the dangerous side :P

You made a good job of that im impressed how much does it draw from the mains? Ive seen someone welding straight from mains no rectifier or current control yours is far superior

Finally ... I've found your website & hope you explain It ;)

Great design, almost too great for doing just a welder of that! ;-)

Very nice project!! Do you think IGBTs of this kind HGTG30N60A4 can operate at around 80 kHz so as to use a smaller transformer?

Very cool. Great job.

Can you please test ZB2L3 battery capacity tester?

that is crazy PCB ... nice work !!!

Another fascinating video. Thanks!

Not dodgy, just diy! And actually it's very nicely built! But how did you dimension the current sensing, the components and the transformer?

That's pretty awesome.

Nice vid bro!

That's an awesome welder! Any chance we could see you lay down a bead with it on some scrap steel?

I Wonder how does it work at 40 kHz with such long wires from primary side transistors to transformer. In modern welders this distance is much close.

I wonder if you could use an old very high watt (server power supply) switching...? Just hook some leads to the output. They're cheap but I don't know if they could take the abuse 😬

I would like to see you TRYING to weld a rusty tissue-thin exhaust pipe with any 'stick' welder. I remember the time my uncle bought a stick welder, the type that runs off a car battery. By the time he'd finished welding his old banger car, it had more holes in it than before he started!

Thank you very much for sharing this project. Would please share the complete schematic for this project, please again?

very nice. ..the schematic show your big capacity..

Do you have any upgrade version of this machine, such as using lm358 to adjust the output current or sth...? It will be very nice to see it!

I relate to this so much. I have way to meany temporty hacks that became perminat.

It's a miracle that you haven't burned down your house. Go, Go, Gadget!

Bravo for the build. You really know where electrons like to flow. What is the max power of your diabolic welding device?

i love it specialy because is a work in progress proget

State of art dodgy welding machine. Just waiting to reborn with some shiny box.

Coolest thing ever mate ! As I have seen many inverters as yours in the internet this led me to a question. Why it seems that every inverter has a primary current regulation ? Because for accuracy and tight regulation wouldn´t it be better to measure at the secondary side of the transformer ? Yeah I know that there is DC on the far right but I mean directly at the output of the secondary where still AC exist so you can use the current transformer there too.

Do you design power supplies for a living?

Wouldn't the output be kind of unipolar without the rectifier, since the transformer is only driven one way and freewheeling the other

Nice job

What is the output current? I only have old school welders. I would like to build something like this. My stick welder was considered old school 20+ years ago! I do have a wire welder. That's 120v it would be nice to build a switching supply welder from its parts. And be able to power it from 120/240v great video. I hope to see more on this welder. And similar projects!

Please show us the welder in action with your exhaust!

Hello someone PLEASE help me. I don't have that type of old gate driver transformer . So can I wind wire on a circle toroidal core

Awesome creation.

Dobrý den, proč jste nedal tranzistor npn k napájení 2 tlp 250 současně místo tranzistoru mosfet, aby se mohly zapnout tranzistory igpt

This video make my day, very god work