Battery Spot Welder (CD Welder) || DIY or Buy 

I will see what I can do

put the super caps on the PCB (with a lockout jumper), or put a screw terminal for them

Sparky BearBomb Or he can use a protection board made for super caps.

that's a great idea, can be used for more projects then =)

Sparky BearBomb Absolutely!

I fully agree. Much too often, doomed projects are being kept alive and attempted to be salvaged just because "We spent so much time and money on it already, so all that would be wasted if we stop now!" Great Scott made the right decision here: Giving up and concluding that "Buy" is the right decision for him, and providing us with his findings, so that we may make an informed decision to also Buy instead of DIY, or alternatively, DIY while building on his knowledge. It takes guts and discipline to abandon a project you already spent a lot of resources on. Thanks, Great Scott!!!

Absolutely agree.

The Chemical Workshop me too xD

Yeah! I don't get the point of videos like this ether. It's one thing to show you misstakes and how you solve the problem. That is also helpful to others. But show a video where you give up and buy the product instead it's quite pointless - especially since the product wasn't that cheap to buy ether. There is another video that's even worse when he tries to build a microphone (search for Voice over microphone DIY or buy) and end up buying one that has worse audio quality than my DIY microphones I use for my videos. Still it costs like 10 times as much. Yeah - I want to show people that they shouldn't try to build their own microphone, because I don't know how to build a good one my self. I should make a video my self about how to build good microphones, but have been to lazy to do that (maybe later). I'm not complaining on this guy in general - he has a lot of knowledge about programming and stuff that I have no idea about, but posting videos where you just give up and buy the product instead isn't helping anyone.

Ride84XL exactly my point We don't have 200€ for a gear like this we would rather copy 1:1 other design (youtube?) And give credit to the maker saying we copied 1:1 I think he has to take the perspective of saving every cent he can like all poor hobbysts do? I'm sure there are a lot of solutions Man for 200€ for as simple thing like this...

Ride84XL, The Chemical Workshop, seriously, you complain because he can not give you a free ride to how to diy a spotwelder? He even TELS you right after the FIRST minute it fails. Come on please.

Bringamosa I think the complaint is the "DIY or buy" title combined with "I tried it, failed, and kinda gave up rather than trying to come up with a solution for the problem I ran into" instead building one that works then objectively comparing the costs & maybe even performance. However, it is April fools day, so who knows if this is a serious video or not

northshorepx any plan for diy laptop battery bank??

Glad you liked it :-)

I agree. I wish more people would post their failed projects too. They are more often than not important learning experiences.

That is why you build it on breadboard or stripboard. You can easily mod the circuit if it goes wrong or unsolder all the components and reuse the strip board.

@@simontay4851 yes but the temtation of not doit its great ..maybe work next time

LOL.. so if you always fail, you become super intelligent, that is bullshit... Occasionally if you fail, it teaches you, but what teaches you more is when you succeed.

It's a bit of both. If you fail all the time then you can get depressed and lose interest!

We will never know....

I think it is a joke

Lol

He used IRL Mosfets so it can't be an april fools prank...

GreatScott! Damn, your a mastermind..

What he said!

yeah man, how many amps exactly do nickle stripes require for how long @which voltage? am i required to have a pulsating cirquit? can't I just deliver that pulse manually? How much complexity is actually necessary for spotwelding?

I use a 300 cca lithium battery and even with the solenoid it delivers too much power and end up burning a hole on the nickel table. Trying an arduino controlled solenoid rn

@@IamG3X I've seen somewhere a vidéo with just a Maxwell 350F ultra capacitor and it seems to work well. I already tryed with my little car battery, it was a disaster

Maybe we must ad to the little car battery a "welding time controller" to out a more precise current? And that would be that simple no? So it would cost nearly nothing. I'm wrong? I Can explain the origin of universe also. But no one care

@@jeanterine4712 i use arduino relay to control the solenoid to switch on the battery. haven't test it out yet.

@Smattless sir lol. i actually watched the guy that you linked. i use his idea of the solenoid as an on/off switch but it still TOO POWERFUL for the nickel strips. I thought you can use to arduino relay to turn the solenoid on and off better than your finger. idk

Lol

Polaki cebulaki :D Siema

Olitoni elo co tam

Pook365 xd

Your English is better than my Polish. Well done and good luck😀

nah, he used those ultracaps, not supercaps.

@@JohnCena-iw2vk same difference

Solder Joe u don't know !

you can weld the positive terminal. you just have to put both of the electrodes on the terminal, otherwise the current will go through the battery. but nothing stops you from welding with the car battery in that way.

There are numerous videos on RU-vid that prove you wrong.

Solder Joe - The comprehension problem is your failure to comprehend the path of least resistance. You have gone full on tard here, check yourself next time.

there is 100s of tab welding videos using a 12 v battery -joe is keyboard warrior

Wolfshark Can you explain a bit more about the mosfets ? I didn't know that could be a problem, I'm curious.

I will probably not explain i well enough, but here how it is from a practical point of view: Lets, say you are using mosfets to turn on a 12v car bulb. Let's say you are using a logic level n-mos which can switch plenty of current at 5V at the gate. The correct way to wire everything would be +12v to the first lead of the bulb, the second lead of the bulb goes to the drain and the source goes to ground. When you apply 5v between ground and gate (which in this case is the same as applying it between the source and gate) your bulb will light up and the transistor would be fine, because 5V at the gate would be enough for, lets say, 10A of current to pass through it. Now let's say you install the n-mos on the high side, meaning +12v goes to the drain, source goes to the bulb and the second lead of the bulb goes to ground you will have a problem. You apply 5V between the ground and the gate, but that's not the same as applying it between the source and gate. There will be significant source offset from ground, because of the lamp that is between ground and source. So, your transistor is turned off, so the resistance between drain and source is practically infinte for you. You apply 5V to the gate and the transistor is starting to turn on. The resistance of the bulb is, let's say, 2ohm. As the resistor is turning on, the resistance between drain and source begins to fall. That resistance might be very low when the transistor is in it's ON state (in most cases lower than 0.1 ohm), but it won't go there instantly . It will fall very quickly but let's say it reaches 4ohm in 50us. At 4 ohm at the transistor and 2ohm at the bulb you will form, effectively a voltage divider. That would mean 4V at the source. And you have 5V at the gate - that would mean 1V between source and gate! That would definitely not be enough to turn on the transistor, so it would balance in that state. So now you will have a very dimly lit light bulb and a very hot transistor. So If you want to use a n-mos transistor on the high side you should use a high side driver which will deliver the proper voltage between gate and source. The alternative is to use p-mos, but you still have to use a driver, and generally n-mos transistors are better. English is not my native language so sorry about the (possibly) confusing explanation.

nessotrin ,i think he is worried about the Vgs breakdown voltage because the source of the nmos will be floating

Hehehhe. What he said! Lol its over my head but id love to see you fix that spot welder :P

www.infineon.com/dgdl/Infineon-BTS555+E3146-DS-v01_00-EN.pdf?fileId=5546d4625a888733015aa3f57e5e103e :-) Done ! (Power Supply , 1k resistor to Caps, caps to BTS555, bts555 to welding tips. the cap legs are too thin for high current tho...)

Vansh Dhir he tried that originally in the video

Electronics is purely mathematics, not trying and making mistakes -procedure. You can predict pretty well just by looking the schematics that does it work or not.

Express shipping

Shipping by crane. Not crane, a lifting device, but crane, a bird that allegedly brings babies. Sometimes it brings them dead.

international express shipping costs i guess. i always pay it because waiting months i cant take it.

true af..

EUR or USD?

Yeah... otherwise, just etch your own boards for like a $2 in materials... lol

stay creative and see u next time hahahahahaha

rip 1/2 AAA game

They cannot discharge fast enough

Alberto cornejo Ave actually did that though he used high power 18650 cells to do that and he was successful

banano banana i use a turnigy nano-tech lipo battery and it works perfect 🤔, but i know that maybe other kind of lipo batteries can not support it.

Laharl Krichevskoy yes, i break a 8000mah turnigy nano-tech cell one month later 😫

Because, even though super capacitors have a "super" in their name, the amount of energy stored is big only relative to its not-super relatives. LiPo, or LiIon, or even any alkaline battery has far more energy stored than even super capacitors.

Place the Super Caps on the same board if you can. Please and Thank You.