Hey guys, if you want to make a donation, you can find me on Patreon, or make a donation via paypal. If you want to donate by other means, you can contact me under that same email address. patreon.com/tpai paypal-donations: inventordonations@gmail.com Older episode about welding transformers: kzfaq.info/get/bejne/oZtma5eetrC1gok.html Video about my DIY Exercise Machine: kzfaq.info/get/bejne/npiJiLJlxLWYqGw.html

I love this sort of video. Having a mixture of videos is good, otherwise things can become boring.

I love the insight the step-by-step overview of the entire process is giving. I can't put to words how educational it is to just show the entire tinkering process.

thank you so much for using the German vocab along-side the English for so many of the technical points here. What now feels like a thousand years ago, I was a reasonably competent German technical linguist now 30 years out of practice. Your videos like this a refresher on both my technical German, and Electrical Engineering courses from the 80's. So much appreciated

Please don't assume the length of your videos are boring!!! I could watch you all day for that matter. I don't think a whole lot of people are going to get upset if you produced a video that was an hour or longer. You have this "knack" for making time go quickly with all the videos I have watched by you. You're a breath of fresh air and a great educational source for some of us old farts! Keep up the excellent work! I eagerly await your next video. BIG FAN of your scrapyard finds! Thank you for making COVID quarantine go by a little bit quicker too! You make learning fun!!! TY

Takes me back to the time when I could still claim to be an Engineer.

Definitely keep theory in some of your videos. Your hand drawn graphics are refreshing and add unique style to your channel. Personally, the part where you went "live" and explained the wave forms was best for me.

Pleeease continue just like that. I think it is very interesting

*I love the shot of filing the screw head. From start to finish in one stroke*

I can understand adding the fan. I have no hope of understanding the circuit. Thanks for a nice mix of information.

It's my favourite internet German. Might be one of your best videos. Brilliant experiment. Thanks for making great vids!

Thank you ver much for teaching little tid bits of German while you do these videos.

The more videos like this that I watch, the more I realize that I'm a big dummy. You're brilliant!

I wish my brain worked like yours. I can't even remember my phone number. I love your channel

More of these videos please!!!!!!! Awesome content

Its 2pm in Nairobi n i couldn't wait any longer to watch your new video

Fantastic followup with great insights, thanks very much for your comments on this patient.

On these older welders in the UK, we are advised to upgrade the fuse to a 32amp fuse/trip switch. Many workshops I have seen have had 32amp socket circuit specifically for welders and compressors

My dad taught me how to stick weld years ago. And I must say, I've gotten pretty good at it. Setting the duty cycle depends on the thickness of the work you're going to do. We converted my dad's old AC welder into a DC welder using some huge diodes my dad got from where he worked. Now it welds great without so much sputtering. W Rusty Lane K9POW in eastern Tennessee

Congratulation from an Italian neighbour. Your youtube channel is very interesting and your ideas are perfectly explained through the video. Merry Christmas

So very interesting going to have to watch this a few times glad you’re feeling better.

I added three server fans to my old stick welder twenty years ago to prevent overheating. The fans have prevented it overheating ever since. The fans operate before the on off switch so they function as soon as the welder is plugged in. This has worked well.

This should be shown in every High School General Science class on the planet. Very well done.

I found a discarded treadmill. Scavenging the motor and speed controls while watching this vid. Now I want that orange welder in the video too.

Thank you for this video, I am a hairstylist/engineer and have been looking to customize a hair dryer. Basically I will try and use these same circuits!

I'm honestly really surprised those units didn't have a fan to begin with... it's such a cheap thing to add and improves the duty cycle so much, it just seems like a no brainer you know?

Listening to a German guy narrating this, makes me feel smart! 😀 "Streuhfeld Transformator" sounds just so cool!

No one can explain and draw beautiful schematics better than you! My God i learned more stuff here than my 5 years degree. You took me back to the time of Faraday and Maxwell :)

Still my favorite channel on KZfaq. The world keeps changing, but TPAI guy stays resolute!

Waited so long for this! So happy.

Really enjoyed this combination of big power electrical equipment and low power electronics and control circuitry.

Same Einhell welder, just added a 120mm mains fan to the rear, using the existing 4 holes and grille there already, but not installed by the manufacturer. Blows across the transformer, and with the duty cycle now being weld a rod, wait a minute, then weld another rod, perfect for my use. Only drawback is that when welding the extra stray magnetic field tends to stall the fan at high current, but it will carry on again when unloaded, or at low current. Never bothered to put in any power factor correction, but did add a single diode on a heatsink , connected to a 40A thermal breaker added to the front panel, and a 4mm output, so that I can use it as a battery booster, being able to get a car battery from flat to able to start a vehicle in under 1 minute.

While this type of videoa might not get as much views as the scrapyard find series, i very much appreciate and am a big fan of this types of videos.

Great video and interesting topic, we could all do with some extra knowledge drops. Also like i said to someone today sometimes to learn you have to spend more time and materials than you could buy it for but no part of living is free

Thank you for sharing your wonderful videos I am from South Africa

Thanks a lot for sharing your knoledge with us. Greetings from Brazil.

Hello friend , for your fan, why not use an old PC Power Supply ? Too Easy to Find. Your communications are very interesting. Thank's.

Awesome video! I am happy the audio is in English for the for the fact that growing up in the states, it wasn't a priority for me to learn a second language. Thank you for the great content!

Such a great, wonderful and skilled man 🙏

Love your video... but my head hurts now... 😂🤣 Keep doing what you do. ❤😎👍

Wonderful project.

Excellent content. Thanks for posting!

Very interesting type of video can’t have enough of those. I also love your junkyard videos!

What a work ! respect

You done a better job on this than I did, might post a link of your explanation video to my "old smaw refurb" video aha

Love this stuff. I won't lie a little over my head with all the electronics but still I tried to learn a little something.

You have some serious skills. Respect

This episode is amazing! So few practical videos out there dealing with the household AC.

This kind of video is unbelievably valuable - I watched it with my 14 year old niece who is getting interested in electrical design and it was a really great way of explaining how circuits work. Thanks again.

PURE GOLD i for one would love to see more follow up work on these welders thanks tpa!!

Enjoyed your electronic explanations, thank you.

you sir are a legend. love the power control circuit and even more so i love the detailed explanation. much respect my friend

Great video! Thorough and informative!

I am commenting before watching your video. Coz i just let out a big breath out after seeing your upload. It means to me alot.idk why though!

FANTASTIC video!

Would have been fun to implement the controller analog without μc. A 555 and an opamp should have been enough. Edit: I see you implementing an analog circuit later and the μc implementation is surely a valuable education! No criticizing here!

A superb video, one of the best of its kind.

Absolutely fantastic video

Very nice work plus very patient and detailed explanations!

I think you have the mix of practical and instructional about right. Love your videos!

Yes, without a doubt. Keep up the great work. Thank you!

I like the boldness of releasing a deep dive that is definitely not a repairathon. I love the repairathon but I support the multifacetedness of your channel. It reflects you as an individual :)

Personally, I really enjoy the practical (Mechanical and restoration) projects you do, But I often become lost when you jump into the circuit descriptions and theory. I think it's important that you still include them though, because it's going to be useful for people who want to understand exactly WHY something works, rather than just copying a circuit that you've already thought out without them understanding how it does what it does. I remember watching your video about how a magnetic shunt works in a welding transformer, and dispite not understanding everything you talked about, I still think I now have a much better understanding of the principles behind it than I had before watching that. So thanks for making me ever so slightly less of an idiot. :D

Finally a new video. Hope all is well

Great video.

Good to see you are back. Hope you are feeling better now. Loved this video and look forward to the next. 😃

Like these videos a lot along with the electronic repair ones!

I love this style of video. Thanks for making this!

love the graphs!

I really enjoyed this video

this is awesome. Thank you so much

16:38 a nice cap bank after that rectifier should help a lot because as you noticed your getting the positive pulses of the ac.

Yeah, make a enclosure out of really thick steel. And some interesting shape...art deco. Because you have to look cool. Them server fans can move some air, servers get really hot.

Its cool (no pun intended) how that fan changed the saw tooth profile of the temperature into a triangle wave. Increasing the heating time. Then pulses used to describe dutt cycle. It all makes sense its just interesting seeint this outside of electronics.

What an amazing Video/explanation quality. Thank you

Thanks. Always enjoy your videos. Appreciate the time you spent for creating this video.

Fantastic video very informative

very good video! plenty of info. 36 minutes well spent!

HIGH IQ mate. Didn't follow every aspect of some of the power electronics as its a little out of my wheel house but I understood a lot of it. I have followed you since the early days - no one else on KZfaq has the same calibre of power electronics content of experimentation and modification that you have. One of these videos every now and again is critical to the channel in my opinion. You remind me a lot of my grandfather. He was a VERY clever electronics engineer mostly self taught.

Always Love welding and diy

Love this stuff! But Littlebit over my head! Back in the day I had an old 220volt stick welder AC only and DC is a much better arc control for the rods I was wanting to use,my Dad work in electronics his whole life with patents in Japan and he sent me a huge diode to hook up with change the alternating current to direct! It was pretty sweet. Great video,very well done! Be safe and happy holidays to everyone

A very interesting project. Looking forward to an update.

Always great content! Thanks....

I really enjoyed this video - I learned several new things about Triac control that were fascinating!

Awesome video. I can't wrap my head around some of the specifics, but I get the gist and it's very entertaining.

Mounted a full diode bridge 90A in my old transformer AC flux core welder. Made the welding much less sputtering and capable of welding thinner gauge. Recently got a Lidl 100 EUR flux core welder and it is so much better. No wire speed adjustment because it does it itself based on current draw and it looks like tig welds, welded a thin gauge tube on the side of an oil barrel and it holds water and that was on 0,6 mm gauge soft steel.

Altough the circuit with the potentiometer seems a lot more practical than turning the original current control knob a million times, isn't it a lot harsher to the mains network as you are enabling the triac mid wave resulting in a big spike of current? I did actually use a similar circuit before with the zero cross detection and time delay for a heater but I rapidly changed it as soon as I noticed the flicker it was causing to the lights, in my case since it was a heater it was easy to solve, I just used an opto triac with internal zero cross detection and used time proportional PID (which results in like a slow PWM with 200ms period) to control the temperature but this of course wouldn't really work for a welder or atleast it would result in terrible welds I think. Keep up with your videos I really enjoy them!

Great video man! :)

Great “episode”. What I would like to see in future is more renewable power DIY stuff. Like grid-tied exercise bike.

Oh yeah...this was the first thing i did with this cheap Einhell welder... Right out of the box, even without trying it as it is, i added a fan at the back (from an microwave oven...230 volts) and changed the welding leads for longer once with higher cross section... Now it is nearly impossible to trigger the overheat fuse in practical use. (unless you are a professional pipe welder or so.... xD) I did the same on my cheap flux core welder. There i also added a extra power supply for the feed mechanism to make the welding performance smoother. All in all, very cheap and easy to make upgrades on such low budget machines.... Thumbs up...good and informative video. Greets from Bavaria.

That is a very educational and useful video. Thank you very much for all the information.

Superb work, more please 🙂🙂🙂

Ding and done, I love finding "broken" things to furbish or repurpose, thank you for your videos!

Interesting welder experimentation, looking forward to the next part. Pretty wild seeing all the sparks in the shop, bet you appreciated the bigger grinder when cutting that pipe. All those scrapyard repairs paying off ;)

To maximise the transformer cooling, immerse it in oil. Though the class and type of insulation used on the transformer may preclude this.

He he. I clicked on the video before even receiving the patreon notification 😃

I added an 8 inch fan to my MIG which cured the problem of cutting out. The transformer doesn't have a shunt though. It has separate winding's for each current setting.

I like this kind of content. Thank you for this!

NICE WORK

Super video bro❤️