GreatScott = Potentiometer ElectroBOOM = Full bridge rectifier!!!

Finally a spot welder I might build! Thanks a lot!

@denndy

5 жыл бұрын

Your comment is 2 Days old. This Video is uploaded 2 Hours ago. KZread?... What is going on?

@deadbird99

5 жыл бұрын

@@denndy Patreon.

@GRBtutorials

5 жыл бұрын

I might build the other, though, because the reason it didn't work was some critical mistakes when designing the PCB, not its feasibility, and I don't have a spare car battery nor a 1000 A relay (which are quite expensive).

@TecSanento

5 жыл бұрын

you may even use a 200A Battery disconect Relay - as i did - wich is cheaper

@raiptv3393

5 жыл бұрын

Old saw blade kzread.info/dash/bejne/iaiCzcGqeca0Z7Q.html

I've started watching your videos because I wanted to learn some basic electrical engineering. Three years later and I actual understand what's going on! Thanks for sharing your ideas and lessons.

Fantastic job great video like always 👍

pro tip: don't crimp or skrew soldered wire; it will get loose after a while - after all, nicely done project! like

You are the hero I needed. I messed up some cells in my Esk8 battery pack because of broken parallel cconnections due to solder connections failing. I don't want to resolder new cells so I need an affordable spot welder and this is definitely a viable build. Thanks for persisting and finally designing a working spot welder. I cannot thank you enough.

I used a homemade spot welder 40 years ago. 120 vac to 15 vac using a 12 v octal timer and 1/4 kwatt transformer. Did flat heater wires! The most expenses part was the 1/4 kwatt transformer!

When I am thinking about building a spot welder, here you are making a video! Great video!

Cable shoes 🤣 that must be the German Translation for ring terminal! Love the German language.

@jaras1969

5 жыл бұрын

Well here in Denmark we call those "Ringkabelsko" (Ring cable shoes), as opposed to Spade connectors (spadekabelsko) or Pin terminals (stiftkabelsko).

@supercunthunt7756

5 жыл бұрын

Yes, your right🤣 🤣

@andreidicu2882

5 жыл бұрын

In Romania we call them "papuci" and it means shoe so nothing out of the ordinary here.

@reallyiffy

5 жыл бұрын

@@jaras1969That's really interesting! Does that mean that "shoes"(sko, and Schuh for that matter) has a meaning that is more broad than shoe in English? Possibly something like distal appendage cover?

@FlyingShotsman

5 жыл бұрын

@@reallyiffy The word shoe is used for electrical contacts in English also. The sliding contact on an electrically powered trolley, for example, is called a shoe.

I would be very interested in how that big relay is constructed, specifically the contacts. Would you do a teardown? It seems to be screwed together so the teardown shouldn't be destructive.

@jkbrown5496

5 жыл бұрын

Generally, they are just solenoids with a thick copper washer on the end of the plunger that is pulled into contact with the two high amp terminals when the coil is energized.

@loukashareangas4420

5 жыл бұрын

Well, yeah, I know how a relay works, I am more interested in the contacts themselves. Can they make the contact (easier) as well as break the contact under a 1000A DC load (doubtful), or is the contactor supposed to be operated under no load only. Those kinds of details.

@loukashareangas4420

5 жыл бұрын

@@mustafayasiraydin exactly!

@Schniels65

5 жыл бұрын

Ich würde auf Graphit Tippen.

@jkbrown5496

5 жыл бұрын

@@mustafayasiraydin Perhaps and I know they use alloys for high voltage contacts. But the ones I've seen generally use the large contact surface area, along with dual contacts one on each side of the disk to deal with the low voltage, 12 volt, high amp car solenoid switches. The solenoid action and the spring return ensure short make/break periods. These are expensive commercial devices with exotic alloys.

Hey great scott you really are "THE ELECTRONICS GOD" I hope i can make my own spot welder base on your circuit diagram. Excellent job!!!

I’m so glad you reviewing this spot welder, and make a different one from it

Amazing !!! You have access to really high class accessories, tools, components and all that is needed for any projects.

This would be handy for so many projects. Not just electronics. Great build!

Your projects always look so clean with everything brand new. NICE😊

I build the exact same spot-welder. But I upgraded it then with mosfets instead of the relay. I also replaced the car battery with a "car starter Powerbank". It works perfectly.

Hi Scott, I really enjoyed this video. It was very well made as usual, with nice drawings explaining everything. But the project(s) itself were the main star, very creative and what I liked especially was that you finished the job and didn't just call it a day after the first failed attempt, goes to show that stuff like this needs several iterations, which is very important IMO.

Exceptional build, good job!

Hi, that project is super, and now something you can rely on! Happy days!

Awesome that you were finally able to create a working DIY spot welder!

@greatscottlab

5 жыл бұрын

thanks :-)

Hey Scott, that's a great video to introduce spot welding and also explain in detail the whole schematic of welder circuit... Nice built up... Thanks

This is so great, I’m already getting the components to build my own... Thank you so much!

Finally a proper working diy spot welder we'll need a "DIY OR BUY" video to for this one

Ive made a spot welder by using microven transformer. And I control the 220v input of the transformer with my diy SSR with a triac which can easily pass 20A. And rewinded the transformer so the output is around 6-7 volts and its the cheapest spot welder with 2 pulse system

Congratulations! You did it! :)

@greatscottlab

5 жыл бұрын

Thanks :-)

Missed you last week. Good build, nice demonstration.

Fantastic project, keep doing I really enjoy watching your videos. Thank you!

Legends straightaway proceed to end, and then rewind whole video and watch 😊

That idea is very helpful us to done our project related with spotwelding Thanks to you for this video

Another video = another reason to be subscribed 👍👍👍

thanks for this idea, i actually have most of this already. saves me a bunch of money to get started.

Listening to this while my eyes are closed made me super aware of your breath in before starting each sentence.. 😅

Hey Scott, Nice Move. I wanted to build it like forever. Thank you for your video and the code...

I never thought of using a starter solenoid. Very cool idea.

Finally you have done it! 👍

seriously, this was one of your coolest videos to date 😎

Very professional looking project.. Amazing

Thank you Great Scott. Your last designs inspired me to DIY my own spot welder first from a car audio 20V 1F capacitor. It was not powerful enough even charged to 18V. So I turned to a car starter solenoid/car battery/timer configuration back in February. Simple, consistent welds on my 13S8P bike pack from recycled laptop batteries, (don't use recycled laptop batteries for an e-bike). 880CCA car battery: have, $16 starter solenoid from autoparts store, 3D printed holder for spring loaded welding tips recycled from an actual automotive spot welder and processed in a lathe. Borrowed the auto-pulse idea from Maletric's design. No idea how many joules i'm welding with, enough would be my guess. 15mS seems a happy medium between 8mS just starting to contact and 45mS blowing holes through 3 layers of nickel strip.

Knowledge is better than love and it's only getting better everyday.

A successful project Scott, Congrats

For those newer to electronics, like myself who were wanting to build something like this, there were a few components that were not included in the list of this video or in the Instructable: The red film capacitor appears to be a Würth Elektronik WCAP-FTBP Film Capacitor (which is what came up when I was finally able to get a clear shot of it at 6:10). I am not sure if this is the 470UF cap or the 220UF cap. WE does not carry a 470uf capacitor, but they do carry ones listed as 470nf (.47uf). So now I am wondering if I am looking at the schematic incorrectly, if it is mislabeled, or if the standard aluminum cap is 470uf and the film cap is 220uf. This is why it is important to label all of the components during assembly, because there is no way of telling what is what for those who are new. I tried to find the 10U capacitor, but couldn't see one on the project. Instead, there also appears to be a tiny SMD Ceramic capacitor that is soldered on the bottom of the breadboard. This was shown as a loose component next to the WCAP-FTBP at 3:41, and then shown on the underside of the board at 4:41. I am presuming this is the 10uf (not nf?), but at this point I don't know. I would appreciate some clarification from GreatScott or more electronic-savvy individuals on this channel to be able to correct me if I am wrong on these observations, or the labels of these components, but I thought I would try to help those who are confused by the omission labelling of some of these components in the video. An updated PCB trace would be amazing to help those looking to repair their 18650 battery packs without needing an electrical engineering degree in order to complete the project. As a backup to this project, since I am not confident in being able to find/layout the exact components, I plan on toying with using a 555 Timer in monostable mode with a potentiometer to control the pulse duration of the relay. EDIT: After re-examining the schematic, it would appear that the 470uf cap is the standard aluminum capacitor as it is next to the 12V, and since the red WE film cap is next to the TC4420, that would likely be a the 220nf (.22uf) - but I am not certain.

@vivi-fe5rj

3 жыл бұрын

Thanks for the write-up. Apart from playing around with assembly projects, I'm an absolute beginner at this kind of thing, but I came to the same conclusion that the red film capacitor is 220nf, and that the 470uf is a standard electrolyric capacitor. Hopefully that's correct, because waiting another 2 months for Aliexpress will kill me haha. I wish he made the parts list a little clearer, but the schematic certainly helped. Like you said, I'm just some guy with limited electrical experience trying to make a cheap spot welder but for what it's worth, I think what you're saying is correct.

I love ur videos great scout!!

yesterday I looked for a DIY video for spot welder then I watch the old video. I was thinking when he is going to try again :D

Nice Job! and congrats on hitting 1M SUBS!

Beautiful work, dude! 😃 I'm going to look for everything you used and try to make one too! 😃

Nice project! I'd simplify it even further by replacing the Arduino with a 555 timer. Same footswitch and RC tank, but simpler trigger circuit with no need to code.

Very nice spot welder! Keep it up man!

Stay Creative and I will see you next time Love that line

Finally an other video

Great simple project. Thanks!

You finaly nailed it. Now make functional welder

Don't mean to spoil the fun of building spot welders to anyone, as this is a pretty awesome thing to do, but in case anyone needs something to get the welding task done, welders have now become cheaply available on Amazon for about $50, or AliExpress for about $30-$40. Probably not as great efficiency as ones we can build ourselves, and certainly less configurable, but get the job done. Sharing this only because i recently needed just that to recover a 84V battery (leaking cell). My first impression after coming across this video was that the welder would cost as much as a power cell, but thankfully it wasn't that bad. Bought myself a tiny and great looking box that gets the job done.

Por fin un experto en lo que hace, gracias por compartir tus conocimientos

Excellent project 👍

Man this was real nice .

YES! exactly what I need!

I was actually thinking to buy one from eBay but after your video, I might give this one a try.

Great Scott what a great video I will be using this at some point to make one

There is another very popular and relatively easy way, It's to use a rewinded transformer from the microwave oven as a power source for spot welder. It would be nice you to make the video about that.

Nice, I like the simplicity...

for screw connection of the cable you shouldn't solder the cable... IPC-A-610 norm...

@yereverluvinuncleber

5 жыл бұрын

The high surface area in the copper in the cables exposes to oxygen which eventually tarnishes and causes increased resistance, generating heat in the cable and reducing the current. Soldering it as one mass reduces that corrosion and keeps the current flowing. If it was higher voltage (240v) and continuous current flow then I would have said not to solder but for 12v it is fine as long as that screw connection is good and the solder is soft.

@mich29sm

5 жыл бұрын

Yes, it is recommended to use ferrules instead. The solder become brittle under mechanical stress (and with time) and the termination becomes very unreliable, causing high resistance/hot spots.

@yereverluvinuncleber

5 жыл бұрын

Agreed, always difficult to decide what to do. For an application like this, with only occasional usage it should be fine.

@NL00iemand00NL

5 жыл бұрын

I did a test on this and after about half a year the wire was lose and didn't make contact anymore. With these connectors it could work since the screw itself pushes the wire together if you screw it tight enough altho I wouldn't recommend it.

Great video. A starter-motor relay (from a car) can be bought very cheaply (mine was free) from a car dismantler.

Hi GreatScott! Thank you for your great content! I found in your code that when the "timems" reads "0ms" the welding tips can still be live/ shorted if the foot switch is pushed by accident. The code in your void weld reads as follows: void weld() { if(digitalRead(2) == LOW) { digitalWrite(9, HIGH); TCNT1 = 0; OCR1A = timems * 250; wait = 1; detachInterrupt(0); } } I have amended the following lines to make it safe. void weld() { if(analogRead(A0) == 0) digitalWrite (9, LOW); else if(digitalRead(2) == LOW) { digitalWrite(9, HIGH); TCNT1 = 0; OCR1A = timems * 250; wait = 1; detachInterrupt(0); } } Regards Charles

Very well done! I do car audio and like those battery adapters you bought.

Great video Scott congrats

congratulations for 1M subscribers 🎉🎉

Great videos man, I love your work!

@greatscottlab

5 жыл бұрын

Thank you :-)

Simple design, Winner :DIY

Great video as always 👍

Finaly ! After the hate on last video i'm glad you did it (more or less)

I used an arduino with a potentiometer and simple timer code to pulse a 5v 30a relay to pulse a Ford starter relay. Cheap and simple. $20 if you already have an arduino.

Nice video. I need to build myself something like this. Cheers

this is awesome as f, keep doing amazing stuff!!!!

Nice informative video, thanks. But the solder skills are improvable.

This is good ! Thanks for sharing !

I'd love to see that relays contacts monitored with a scope. Curious what it's minimum on time is or if it has any contact bounce. Glad you got the project working well!

I gave just come from the other video and this is a much better idea! Too bad I'm a year late to this party.

You're a genius!

Thanks for teaching.

Great video, thank you

Great video man! 🤙

Wow! Swap out the expensive relay for the solenoid off a car starter motor (which includes a relay in it) and this is almost free!

The flyback diode extends the set welding time, because the relay shuts off only when the magnetic field in the coil is reduced

@BillySugger1965

5 жыл бұрын

Ralf Blumhoff V = L x dI/dt. If relay current is 100mA and inductance is 1mH and mean voltage across relay during decay is 6V, then inductive hold time is around 16us. Negligible for a device operating in tens of milliseconds.

You can actually get some really beefy mosfets for not that expensive for lower voltage applications, $40 for a 330a rated mosfet! (Max 40v)

Great Video!, GreatScott! :) I'm looking into creating battery packs, slowwwly ... Merry Christmas!

I love to do what you explain on the video. But I don't have elementary electronic knowledge.

Your the best !!

Don't forget to consider fact that relays require some time to swich on/off

I am not an electronics super Student like you, but I managed to build such a simple Version 2 Years ago. The point is that often the simple Version is the best version. My Spotwelder only consists of a Car Battery, an Arduino, a Resistor, thick copper Rods and Powerful Mosfets, I control the on/off time via my Laptop, so no other complicated circuitry. This stuff is literally no Rocket Physics. I did not even made the Math for on/off Time of the Mosfets. I just tried around a little bit until I became good Results. I think it is a little bit amusing that you tried these complicated versions when the key is simplicity. But nevertheless the approach with the Supercapacitors was pretty interesting. Greetings from Hamburg.

The terrifying videos are the best videos

Connecting batteries with batteries... Batteryception.

@nilswegner2881

5 жыл бұрын

It's always nice to find people I know from other comment sections under videos from another KZreadr... Gives me the feeling that there's people out there that think the same way I do Sadly it's Sunday today so your catch phrase doesn't work

@davidrubio8673

5 жыл бұрын

how did you get over here, i always see you on Wintergatan Wednesday

@nilswegner2881

5 жыл бұрын

@@davidrubio8673 that's why I was talking about his catch phrase...

@azyfloof

5 жыл бұрын

You're a long way from home :P Hope you're well :D

@DMadHacks

5 жыл бұрын

It's great to know there are Wintergatan fans all across the internet. Have a great Sunday my dudes.

finally a spot welder wich work and is not dangerous to use on this Channel, look great, i'm just a bit disappointed that it's not a cd one, anyway this one work and is cheap so....

@greatscottlab

5 жыл бұрын

Glad you like it :-)

@cxmmax4265

5 жыл бұрын

@@greatscottlab sure

0:49 "diy crude oil refining" Great Scott the oil tycoon CONFIRMED! :D

Continue you are the best

Thanks a lot for this tutorial. I have tons of 18650s and I'm building a huge 25s1p pack to power a 1940s portable tube radio which requires a 90v battery and I was going to solder them the "bad" way, with a soldering iron... Anyway, some of the stuff like the relay can be found for much cheaper on ebay: Arduino Pro Mini 1.48€ TC4420 1€ IRLZ34N 1.40€ (price for 1 in packs of 2) DK238 Relay 19.68€ Foot pedal 1.15€ 0.96 Oled display 1.99€ Battery terminals 1.63€ 200A fuse holder 5.40€ 200A fuse 0.40€ (price for 1 in packs of 5) Copper nails 5.10€ (price for 5) Which makes it a total of around 40€ not accounting for thick wires, potentiometers, veroboard all that stuff. But let's suppose it's around 15€ (10€ of cables and 5€ of extra hardware) so the real total price is 55€. You could even remove the copper nails from the list and replace them with heavy duty ground wires if you can get your hands on a foot or two. If you want to go the cheaper route with a 555 monostable circuit you can shave 10€ off the price. And if you think the big chinese electronics lobby is trying to scam you with their scary "safety" gibberish simply get the relay and a foot pedal just like AvE did: Spot welder for 30€!! (anyone reading this, please don't do that, accidentally burning down your table or you house is not worth it for this price.) And again, thank you for this video! Love these useful and effective projects!

Excellent !

You should not tin wires while using screw connectors. The solder can corode and the connection will come loose. The best way is to use special crimped connectors made of copper tube.

Great stuff.

Well done !

I need a spotwelder, I guess I'm gonna have to break down and build one! I'm thinking about using a starter solenoid,