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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: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-k5684mQJQRU.html Video about my DIY Exercise Machine: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-h2YUO4_O4x8.html
Another marvelous video! Please put your PGP Public key, so that people can e-mail you privately, Gmail is unsecure as f*** also, consider using the Signal app.
I like your videos and have supported RU-vidrs in the past but RU-vid has become SpamTube by placing a large amount of ads (6 interrupted this video alone) within posted videos. That makes it very difficult to follow and is worse than TV.
@john croation Search for the channel of a dude called "Rob Braxman" he deals in network privacy/security you will find all information that you need there, thanks for your time.
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
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!
Yes, I was also wondering about that. A standard dimmer circuit as was used for incandescent light bulbs consisting just of an RC network and a diac would have achieved the same result. But it seems that today even the most trivial circuits need to use a microcontroller :-) Nevertheless, great video!
I tried designing one with a 555 and LM339 that would switch a 2 thyrystors + 2 diodes bridge rectifier, well it worked in LTspice but never got around building a real one. making it work on both halfwaves is truly a hassle
@@trevorhaddox6884 well, microcontrollers have the upside that you can upgrade the firmware after you shipped a product. But it depends on the kind of product.
As mentioned theres a very simple DIAC application, used in nearly all vacuum cleaner and so on and theres a lot of integrated Triac controllers. Thyristors/Triacs are complicated to handle. They sometimes might not fire (especially if nearly 100% duty and while used on brushed motors) so you need to re-fire them. This integrated controllers do this very well. Here theres no software required at all.
Being a basic analog pwm, wouldn't it be simpler to use a monostable 555? I do understand the easier programming of the waveform for experimenting, but honestly an Arduino is a bit pricey for a working unit. At least around here it is, lol.
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.
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?
arduino is all cool and good until the RF spikes from the welder starts reseting it LOL Implement a grounded shielding can for the arduino, even a little wrap of copper or aluminum tape (grounded) is a good idea
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
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!
Congratulation from an Italian neighbour. Your youtube channel is very interesting and your ideas are perfectly explained through the video. Merry Christmas
That 6000/1024 is just an integer division right? Instead of being 5.8 it gets rounded down to just 5. However I think it doesn't matter at all here because you're adjusting everything manually with the potentiometer anyway. I would recommend being careful of that C quirk though in future I've seen some nasty bugs as a result of it! Great video btw, are you concerned about the lifetime of the electrolytic capacitors given your theme of post-apocalyptic inventing? :)
how about doing high frequency start? i have a modern inverter mma welder i tig with it but its scratch start. i would love to make a circuit for it for high frequency but i think it might be too difficult. the box is not very large and i think an external solution may not work
You can get these cooling fans with AC motors, the best brand is PAPST hungary - looks just like computer fan but its all powdercoated metal on ball bearings, runs of regular AC power (110V 60Hz for me) no need for any electronics! Also i facepalmed the ardunio stuff! The Beauty of this welder is its simplicity and durability! If you dont feel like turning the screw for a minute just get a speed clamp there. Nevertheless gread channel!
You did not protect your A0 pin from excess voltage if you make a mistake adjusting the 10k pot. A 1k resistor after the pot, followed by a diode to the +5V and another diode to the ground. This will keep the signal between -0.6V and +5.6V. Enough to protect the analog pin. And if you ever made the mistake of turning the port into an output, then you won't lose your Arduino port to the magic smoke. Food for thought.
so they could improve the overall performance 40/50% by simply adding a fan or other cooling to the machine if they bought thousands of the fans how much would they cost wow they must know this at the manufacturer
Whenever i want to know how stupid i am i will watch this video. You are German , translating into English a lot of technical details and i am totally baffled . Your English is very good bye the way , where did you learn it ??
Can you do a video on how to produce calcium carbide from a mixture of minerals, with electricity not chemicals, or just catalysts not consumable mixtures or chemicals?
I would love to learn more about electronics but I’m not really sure where to start. It would have to be a very basic intro as well because I absolutely know nothing about it. Suggestions would be welcome from anyone
I am wondering if you have made the other welder shown in pieces on the left side of the working machine you used ???? Have a great day and peace too. VF
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
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
I made a saturable reactor based power supply. I placed the ballast inductor in my laundry tub. When I turn the tap on it becomes saturated and, because my water is rather impure, the current begins to bypass the ballast inductor and the output is increased!
Welder machine : "You have to wait 5 minute" French :"Let's finish that crap tomorrow" Germans :"Let's reverse engineers and upgrade this welder'' Chinese :"Let's build/sell a cheaper you have to wait 20 minute welder; ps : maybe I won't work anymore''
That second transformer winding for the zero crossing detection is not needed. With one diode after the rectifier but before that first smoothingcapacitor you can connect your trimmerpot to that point
Doesn't the arduino have an analog comparator to use to generate an interrupt? That'd save you having to continuously sample the analog voltage. Another option would be a hardware zero crossing detector, and use a digital pin interrupt. By the way, I am very pleased to see something different than the repairathon videos.
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
I also like his mechanical stuff and it was why I originally subscribed to this channel, but his electronics builds are cringe to watch for an actual electronics engineer. Even though he obviously has some electronics engineering background, some of his explanations and thought processes are wrong and downright misleading.
@@Sixta16 i am not sure, but i think he has no EE Background, in older videos i remember him talking about that he wants to expand his knowledge there and things like that, i believe he is just a self-taught layman.
I wondered if a ceiling fan dimmer (maybe a lighting dimmer too) would provide the needed voltage control, but I assume the current would be too much for it. Still that circuit could perform the function if scaled up. Thoughts??
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 ;)
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
I hope you modify it to be able to do plasma cutting as well... I haven't found much literature on what makes them different as a power source compared to a welder
20:25 wouldn't a cheap standard analogic light-dimmer schematic work just fine (with snubber of course)? Also, two SCR in inverse parallel would be more reliable than a triac, right?
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.
mir wird immer gesagt von Metall bauern das der beste weg mit dem schweißen anzufangen ein ganz normales Elektroschweißgerät ist vielleicht kannst du ja ein gutes altes auf ebay oder auf einem Flohmarkt finden ich hab mir eins von Dalex gekauft :)
A person isn't capable of putting out all the much power, so it is usually not practical to create one. There would need to be other reasons than getting power to justify it in most cases. I have seen practical uses in developing countries for charging cell phones, and tiny battery powered lights. A single solar panel would cost about the same and provide much more output though. If you like I can get you an equation for human output over time. Obviously it varies from person to person, but studies have been done to get an average.
I have all the welders I need,, so I would not need to make the modifications for myself, but I thoroughly enjoyed the presentation, particularly the use of the Arduino. One question comes to mind, and that is how would you design this circuit to work on 220 volts, where the neutral is between the two poles. Bob
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!
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
YES !!! Keep making vids theres got to be tons of poor folk out there with old ass welders...and if information is well handy- they/we just might use it to upgrade our "vintage stuff". I get that price of new (especially stick) welders is pretty dang low, around 70 bucks i think, what is argument for NOT pytting info out??
Man!!! Ive been eyeing my vintage stick welder for the same purpose! However my knowledge of electronic circuits is pretty slim...so on behalf of ignoramuses like me THANKS!
Would it be possible to add heatsinks to the transformer? I have thought about putting some heatsinks on the iron core with thermal adhesive but I'm not sure what effect it would have on the transformer....
