Closing a POWER ARC Switch with a WEAK ARC (LATITY-012)
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- เผยแพร่เมื่อ 27 ก.พ. 2023
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By: Mehdi Sadaghdar - วิทยาศาสตร์และเทคโนโลยี
The "small arc switches big current" thing is used in TIG welders. When you first strike the arc, it pulses a high-voltage between the tungsten electrode and the object you're working on, which is grounded with a clamp to the welder. Once the arc strikes, the welder switches to pushing high-amp, low-voltage current through the ionized channel created by the high voltage arc, and the heat released by the now high-current-low-voltage arc melts the metal you're trying to weld.
well, i read it with Mehdi's voice
p.s. nice example
This is the first thing I thought of and then he said “I think thats used in the industry somewhere” and knew.
Nice write up and explanation 👍
can this principal somehow be modified to build a device that would make a continuous arc? i would like to modify my stick welding machine to have plasma cutting capability's without complex electronics... (old school)
@@ozb2006 Connect the positive to a tungsten tig welding electrode so it doesn't melt, then you want to supply compressed air to the arc so it blows the metal through as it cuts. Boom, you've got a plasma cutter from hell.
or you could just buy a Chinesium plasma cutter for less than what you'd pay for just one good tig setup probably :P
@@jimmio3727 lol amm i already modified my walmart ac stick to DC and then added flux core into the mix, i am planing to add gas to this monster so why not add a plasma dead and a high voltage source and turn it into a plasma cutter? right?
hehehe :-D I like how Mehdi beeped out "kurwa" from the polish clip, not realizing the rest of the clip also consists almost exclusively of swearing 😀
Bolzga GUROM
For those who don't know, the Australian guy at 08:57 is the character called Russell Coight. Well worth watching.
All Aussie Adventures, time to hit the road!
Let's get cracking on another All Aussie Adventure.
@@---------------------------.. How interesting! Looks like Tom Gleisner plays Wallaby Jack, and he was later involved in the production of Russell Coight so makes sense
time to hit the road
9:18
Three years ago in Keysight's giveaway, I won the same model DMM you use in this video.
At the time, I was in college for my EE degree and trying to support a family of five. My cheap multimeter had recently stopped working, and a new one wasn't really in our budget. Receiving a new one was such a blessing.
I'm so grateful to Keysight for their generosity, and to you, Mehdi, for promoting such an awesome event.
W
Regarding the USB-C charger: A proper USB-C implementation wont even give out 5V unless there are two 5.1k resistors connected to special pins (CC1 and CC2), meaning if you connect two USB-C chargers you get 0V on the cable.
Curious, would the same implementation be an issue with USB a charger and cable?
Assuming you got a male -> female adapter for one end. Why wouldn't it short due to high current?
Relatedly, Hackaday has been doing a series on USB-C for the past few weeks... I learned that male-A-to-female-C adapter plugs are _explicitly_ forbidden by the spec. Why? Because if you plug an A-to-C cable into the adapter, you essentially create a cable with two male-A ends with no control circuitry in between, that you can plug into two computers (or two ports on the same computer) and make !!Fun!! happen.
@@ProtoV33MK1 No, that's not the problem. The problem is that devices at both sides would be trying to provide 5V power to each other, and connecting different power supplies together is far from recommended. It can work, but you're opening yourself to a ton of potential problems, especially when the power supplies aren't well matched which results in back-feeding ("negative amps" for one power supply) which, unless the power supply has protection for it, can result in some fireworks.
@@ProtoV33MK1 male A to male A cables are explicitly forbidden by the USB spec. That is why B exists, simply to allow male-male cables without making loops possible.
@@TheToric meanwhile i have male A to male A cable just lying around, that was shipped with galvanic insulation module for the oscilloscope to power it. Yes, the unit has female A connector on it as power supply input.
11:00 i like how you censored one swear word but not the other 20...
I'm sure this principle is indeed used in industry, but it is also used in something anyone can cheaply purchase: a disposable camera. The xenon flash bulb is wired in parallel with the capacitor, but the voltage isn't high enough to jump through the bulb and create the flash until an even higher voltage trigger pulse is applied near the bulb. It's been a while since I've messed with these things in particular, so I might be rusty on the details, but it's definitely the same principle at work in a household product. Fun stuff!
All that said... Heed the warnings not to open cameras unless you want to get zapped with 330VDC. NOT a fun time!
Or, do open the camera, pay your tribute to the zap god, and then casually leave the (charged) capacitor somewhere in the lab for the next unsuspecting pokey-fingered person... ;)
If the label says 330V, that is what you charge it to before storing. It is the rule.
(No)
when i was 11 on holiday i found out about the flash capacitor the hard way after poking around inside a disposable camera lmao
I worked in a Microbee repair shop a very long time ago. A teacher brought in a system that somebody had managed to get 240VAC down the 5V power supply line. He wanted to know if it was repairable. There were craters in nearly every chip. Very impressive
8:34 Yea that actually Got me or should I say "IT SCARED THE $@*# OUT OF ME"
Me to, LOL😂
I am from Poland! And it is funny when you hear your language in Electroboom video :o
"Overthinking creates problems that don't exist." -Thats a really good lesson and coincidentally the title of a book. It applies to everything in life not just engineering!
A good quote someone once told me was : don’t point at high voltage because it can point back
The tires (and the entire machine) often catch on fire (the tires ignite), and after a while it will fall out of the sky. Riding it out is far more dangerous than you think. Often the engine quits running so you can't back out of the powerlines. Often, the operator gets shocked when he climbs down instead of jumping. Often he becomes desperate and tries to shimmy down.
VERY dangerous stuff.
I hope this gets mentioned in the next video. This was hugely informational to me. Thank you.
it even caught fire in the vid, dunno why Mehdi told what he did. The lift is certainly fried and starting to fail mechanically
Does no one in this thread understand sarcasm? I'm by no means keen to electricity in how it works, etc, but even i know that you would not want to just sit there. Pretty sure common sense says that
please post footage of lift tires spontaneously igniting from 10kv lines and ill eat my own butt
@@butstough wasn't there, didn't have a meter. But I've recovered several machines after the fact.
th-cam.com/video/H-d_EeKv_yg/w-d-xo.html
9:14 I don't see an issue here he just incorrectly connected the clamp on the battery, and it was loose, so it created a bad connection. There is a specific tool called a battery drop tester that draws a huge amount of current for a short amount of time to test the battery
0:50 Oh no.... I just ordered a Ford with heated seats....
The arc switching an arc is also called "triggered spark gap" and is used to ignite rockets.
Also used as the initiator for the explosives in a nuclear weapon... all the explosive compression panels must go off simultaneously, to uniformly compress the fuel past its critical mass. Any deviation in timing could result in a nuclear fizzle.
Oh, how wild it is to see how far our species has come in such a short period of time.
13:29 is from an anime titled "serial experiments lain" its good you should watch it
"and you don't seem to understand..."
4:38 I love the phone helping to make arc noises ringing in the background here :D
I designed and built high voltage / high current pulse switches based on that principle many years ago. The switch consisted of two large metal hemispheres, one of which had a surface-gap spark plug in it, threaded in from the back side. The switch hemispheres were held a fixed distance apart in a chamber that could be slightly pressurized (raising the pressure raises the self-breakdown voltage). The big capacitor bank, load, and switch hemispheres were connected in series with the load. Firing the spark plug would ionize the gas between the hemispheres, and an arc would form between them... which would dump a few hundred kiloamp pulse from the capacitor bank to the load. I'm very glad to have escaped that project with all my fingers, toes, and skin intact. :-p
13:37, as someone said that anime is Serial Experiments Lain, from 1998, she's working at a massive computer she got to replace her older one, iirc she was adding a processor upgrade and yes, the thing with the clothes & ESD is a real thing after all, never happened to me... yet
I still wouldn't suggest working with high voltage with your clothes off - that's how you directly go from Serial Experiments Lain to Haibane Renmei...
thx m8
lainpilled😩
Thanks Mehdi for making these videos, I love them!
For esd sensitive environments, there are lots of precautions that are taken place to reduce the risk of esd. I work as a pcb assembly specialist, and in the factory for example, we have a special kind of flooring that is always grounded, conductive work mats on the work benches, wrist straps, esd shoes or heel straps and a jacket that is anti static that you have to wear whenever you're working at your bench. We also have to test ourselves every morning to make sure we are grounded and are not allowed to work or sit at our benches until we have done that. That's only a small amount of the things we do to reduce esd risk!!!
It is so enjoyable, even satisfying, to watch some other guy go on as i did as a child with electricity and things that go BOOM.
When i was 15 i experimented with radio tubes. One of the simplest constructions i made - Was supposed to flash a 220V 60W bulb at 1 Hz.
It was a glimmer tube resonator operating from DC voltage made by a plate rectifier.
It worked well for about 10 seconds.
Then it did something else. Once a second the plate rectifier shot out a bright blueish plasma beam a metre out in the air in front of me.
Problem was the mains switch for my contraption was on the other side of the plasma bursts.
You learn something every day. 😋
Cheers from Sweden. 🍺😀🇸🇪
I was working on a construction site once. Basically, owner of the shop on the street we were working on disregarded safety standards and placed a power cable half a meter underground. So, when our excavator was digging some nice hole in a ground we got quite an explosion 😁
Sounds like y'all hit a vein of spicy dirt.
In the neighborhood there is a new transformer in the built and it was pretty unexpected to see the 20kV lines about 30cm underground in some places.
LOL oh shit! Everyone ok?
@@gorkskoal9315 he-he, yeah. Maybe excavator operator shitted himself a bit 👌
13:50 "don't peek into the factory thinking you'll see something interesting."
B-b-but what if I find the process of manufacturing computers interesting?
Editing on point as always. Great video!
I love your content, informative, educational, humor and just plain easy to be around in person, if ever given the chance. You make accidental shocks look accidental but knowing what you understand with Electrical conductivity.
im never gonna set foot in a ford again /s
I mean, that’s already good advice…
Man you don't gotta use tone indicators, it's youtube not twitter after all
@@recreationOfHampter yup
My dad has a ford torris 2010
@@Guestgamesbscon you mean Taurus?
My day is complete. Another awesome ElectroBoom video. ✔️
@6:20 +/-,. That is used in Tig welders, as a pilot Arc, for easy starting,
4:26; Remember this clip from Mehdi's Jacob Ladder test and details about his project. Thanks for the demonstration, Mehdi.
Just what I needed today! Love the content
10:46 tbh this whole video should be beeped out 😁
typical polish videos 😂
If you don't have a grounding wrist band your best choice is minimal clothing to minimize static charge and touching something grounded from time to time to discharge yourself, the wristband just prevents any buildup to be safer but it's still doable without it.
I used to resell old computer parts. Much of the SD-RAM was old and had dirty contacts, so I cleaned them using an eraser. Then I put them into my test bench PCs, and ran MemTest to ensure they were OK before putting them up for sale.
During summer, I got a lot more failures! I finally worked out that rubbing briskly with plastic onto the memory chips while wearing rubber throngs (flip-flops) made my body into a nice little static arc generator 😏😂
so get nude to minimise static, got it
@@NocturnalTyphlosion I assume you're talking about doing this in the privacy of your own home, when I did mine I was wearing some underwear at least.
Your videos always make my day 10 times better, thank you
Sounds like you could use a transformer.
10x0=0 🤣🤣🤣🤣🤣🤣
@David Davidsonn What's your problem? Life pathetic and sad? Nothing better to do?
@@boobtronic9000 LoL chill he's just joking
@@IRefuseToUseThisStupidFeature I really could
This explains so many edge case questions I had on electricity thanks Mehdi!
10:55 Welcome to the Polish community Mehdi, you are now an official Pole
POLSKA GÓRĄ 🇵🇱
Bobrr, kurwa😊
Man watching your videos is fun ngl thanks and keep doing it
I have learned a lot of things from you. So huge thanks 👍
5:41; The arc creates a bigger flash as a flashover which is a discharge from conduction to give off power from wires, transformers, or other electrical equipments.
Och piękny Polski akcent! Jak miło że ktoś docenia Polskie słownictwo narodowe.
tak, jeszcze jak
Nádherné to je slovo... :D
Polska górą
Any translation of the vocabulary of what was being said " even if it is swearing " Thanks it is good to learn , at all times
Szkoda tylko, że prezentowana jest patologia. Jeszcze ktoś jest gotów pomyśleć, że w naszym kraju to standard.
2:43 *cute Mehdi moment*
8:50 ^...^ this is one of the reasons why we love electroboom... he has his priorities right
1:41 - Easier said then done. Once those sparks start flying, fight or flight sets in and you're not winning that fight.
A high voltage starting arc is often used in TIG and Stick Welding equipment.
Ford's now have heating wires directly glued on top of the seat and run thousands of amps through it so you get comfortably warm real fast
@@LonFun_Official patreon
A comment typed 7 hours ago for a video uploaded 20 minutes ago
Did TH-cam start smoking weed or what?
@@X-boi3.0 That's because it's not actually the upload time
6:04 It is used in lightning arresters to prevent the thunder to go through sensitive equipments
10:51 "Pierdolone" is a swear word too, just a notice for the future
what does it mean?
@@tanker234.2it depends on the context, but in this context it means "fucking"
Thanks!
8:06 I saw another video on your subreddit that was similar. Someone connected a USB Mouse to the wall through a USB charger, then left clicked the mouse and it exploded.
Obviously FAF. The mouse won't even be polled. The data lines will be idle. And it definitely doesn't short anything.
9:47 Mehdi's custom USB Killer, now upgraded to USB-C and 240 volts
The small ionized channel starting a bigger one is used recently to use lasers to route lighting away from structures by sending it to a safe spot.
The nail in the cable is a common practice. It’s called spiking a cable. In the US it’s done remotely with a device that drives the nail on it now it’s not uncommon to use a remote cable cutter. They do it because so many times cables were though to be turned off.
E-Boom ... I almost spit out my coffee with your "living under a rock" comment. LOL. BTW, when I learned Electronics, we called a Full Bridge rectifier circuit a Full Wave Bridge rectifier circuit. When did the name change? Keep those hilarious videos coming!
No name change. Full wave bridge rectifier is still the official, technically correct term. It's just common to abbreviate it. :)
@@jlp1528 Thank You!
1:07 if only Ford would actually follow that advice...
I just went through the MOS school for Motor-T mechanic in the USMC and they played some of your videos for our electronics and electrical classes
At 10:45 in, the porch light in our horse does that! As well as a couple other lights and outlets. For what ever reason our front porch light won't work unless anything is plugged into an outlet on the other side of the wall. Even then we still have to smack the wall to get it to work sometimes. This house is built in 1980 in Florida, in the early 80's there were very questionable electrician practices, for example using aluminum wire instead of copper, which is actually illegal here now to use aluminum wiring.
8:15 USB-C also has two pins for bus power, so maybe it won't even matter?
-The power will be sent from pin SBU1 to SBU2 and the other way around or something, perhaps?-
Nope, seems like i'm wrong.
Hey Medhi , i am just reminding you that YOU HAVE TO MAKE A CAPACITOR ALARM CLOCK (kaboom)
Yeeeee
4:25 honestly your 1million sub video is very educational, pain is a great master after all
11:39 IDK why people confuse electronic/magnetic/heat radiation........ with nuclear radiation
.
like your cars radio, or phones 5G is radiation.... ELECTROMAGNETIC!!!! radiation
not nuclear radiation!!
.
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it doesnt change DNA like nuclear.....
but it might warm you up a bit.... (its a good thing 5g is like 0.00000001 watts.... while your microwave is focused into 1 spot and 1000+ watts)
13:45 you'll still see something interesting it just wont be naked people xD
0:43 Explains all the electrical faults I have in my Focus if that is their training material 😉
12:44 *And* the person working on the wires physically locks the breaker open using some sort of lock out/tag out system. Don't let someone else flipping a switch kill you. When igniters are inserted into solid rocket motors for space launches, the person that does all this wears *every* arming key around their neck so that no one can kill them by turning a key.
I also watched some of your videos, on my avionics apprenticeship! :D gotta say it was a lot more interesting than the ancient training videos they had that I think were from the 60s......
The thing you created with the transformer is kinda like how relays work. The current is loaded through the switch but it isn’t activated (two wires not touching) and then the coil is powered through a switch or a knob and the energy induced through the coil pulls the switch closed using electro magnet. Not necessarily what you made but similar
Thats pretty much how many different types of discharge lamps start. They use a high voltage high frequency igniter to get the arc lit then they ballast takes over to run the lamp. HPS (the orange lights common for street lamps) as well as Xenon bulbs used in projectors are just some examples.
The hammer clip brought back nightmares, just last week I plugged a wire in and was measuring it to length for an outside light, forgot it was plugged in and BANG.. thank god for fuse boxes here in the UK and thankyou me for using cutters with insulated handles.. the breaker popped and I didn’t at all get a shock!
i want to see medhi use a flame for rectification. then some iron pyrite. in fact i would love to see him make a crystal set using a cat's whisker arrangement.
Hahaha hilarious when you said people working in computer manufacturing are naked, i work in a semiconductor factory and we wear complete ESD overalls, shoes, gloves to conduct charges to the conductive carbon impregnated flooring, basically turning ourselves into a wire haha, also there are ionizers everywhere to neutralize any static to keep air at 0 volts. Love you vids ElectroBOOM ! hi from Malta :P
Ionizers to keep air neutral? How does that work
@@MrCh0o If air is ionized then it conducts static away to ground. Static can accumulate on isolators in normal air only because it conducts poorly.
I want the exact opposite of that environment to exist, where absolutely everything (and everyone) you touch results in static discharges. We can call it "artistic," and give it a name like "How it Feels to Have Social Anxiety," but it's actually just about lighting people up like painful Christmas trees in the dark if they so much as think about touching _anything_ in the room. Can this be done without a wrongful death lawsuit?
you ever bumped into a fat swedish man in malta that goes by anomaly?
8:33 Thanks for the jump scare. Haven't had one of those in a while.
nice to see you are still well & blowing things up.. 😁
0:37 "Ow. I just bit my tongue. Ow."
Starting from 6:00 it's quite funny to see how a plant on a background interacts with Medhi's hair))))))))))
90% of the technical content goes over my head, but I thoroughly enjoy your videos. Keep it up!
The way he looms in the background with his hand up while using the "magic wand" makes me wonder if it even is plugged in to any sort of a power source, or if it's just him casting a spell
6:14 it’s a high voltage transitor
@2:25 Yeah, what did happen? I was looking away and shielding my eyes because you were plugging something in, Mehdi😅😆
ESD protection is also about not mixing synthetic material and cotton/wool. Naked is not necessery though, but avoid things like nylon socks with sheepskin slippers.
That's exactly how caméra flashes work.
There is a large 330V cap that gets dumped across the xénon flashbulb, but it's not enough to flash over by itself.
It's either triggered by a third électrode hooked up over the glass tube that creates local ionisation, or by dumping another 25KV low power cap to strike it.
CFLs work in the same way too, they use the inductive kickback from the ballast (HV low power) to strike a high power mains voltage arc inside the bulb.
As an Aussie, it makes me unbelievably happy to see ElectroBOOM react to a scene from _All Aussie Adventures._
A bushie, by the way, is a person who lives in the bush and/or the outback - that is they live in rural and remote areas of the country.
Russell Coight is kind of the Aussie version of Electroboom. Well, he would be except that Australia doesn't really exist.
(I came here after watching SciManDan).
How many ElectroBoomers are needed to change a lightbulb?
i did not know about initial arc vs formed arc. that was cool. I was an electrician in the service for 8 years. no one told us that...
I’ve always loved you’re videos always funny !! I never knew you’re account name !! Just found and subscribed I wish it would’ve been sooner I’ve missed so much !!!
Great fun as always, thanks Mehdi!
But... SOME ANIME you say... Serial Experiments Lain is one of the best anime ever created. And technically very accurate! Which makes the whole thing even more traumatizing...
I have to go watch it now!
@Don't Read My Profile Picture ok.
@@ElectroBOOM The idea of Mehdi watching Serial Experiments is not something I thought my brain would incur today
Now I want to build an arc computer (use arcs in place of transistors). No clue if that'd work, and it'd certainly be very power inefficient, but it'd be very cool to watch if it did work.
You just discovered the working principle behind vacuum tubes. Seriously, that's how they work.
i hope it works better than arc video cards!
@@soranuareane like vacuum tubes without the vacuum
@@soranuareane Quite different. Vacuum tubes use vacuum, arcing happens in not-vacuum.
Arc logic gates like here, using current that can toggle more current (normally closed) would be an interesting project. Vacuum tubes impede current if voltage is applied on the grid (normally open).
Arch... computer...?so you want to run linux? :P
You know, if you put a series impedance, like a wirewound HV resistor, you can get some really nice arcs. I used to do this in a faraday cage for a 200 kV DC power supply. Using those resistors, a pneumatically operated relay and sharp points, I was able to create a DC Jacob's Ladder. With all the stuff we were doing, the building safety inspector was afraid to come in and inspect. It was all great fun.
Saw one of your videos years ago. I'm surprised you're still alive :D
I'm currently in the few days/weeks between exams and regular lecture time at Uni and so I started to relax by watching all of Latity yesterday, was done with all of them and literally thought: "I wish he would upload a new one"
Guess that wish came true! 😃
W końcu Polski akcent w filmie 🙂
Szkoda, że taki słaby
Niestety zeby to śmieszne chociaż było...
Kreosan gdy przytaczany to robił spektakl
9:38; Mehdi, thanks for proving on this clip as an electrical advice.
6:00 a great demonstration of "flash-over"
9:22 mechanic here..... that is CLEARLY staged......
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steel wool WILL!!! light (but it has to be the REALLY REALLY fine stuff... that you probably will not find in the grocery/auto parts store)
.
also... i just used a 9V "smoke alarm" type battery when i was a boy scout (im an eagle rank BOI!!!)
a bit lighter and more compact than a 12V car battery
.
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also.... my GO TO fire starter was dryer lint rubbed in vaseline
and i had a "profeshional" flint and steel
.
not the cheap stuff with like a 2mm fero rod.... and you have to use your knife (or this TINY POS striker that comes with it)
this one was like a HALF INCH! fero rod... and a nice sized striker
.
it would make a SHIT TON of sparks..... so much i could get normal "printer paper" to light with very little effort
but when it hit that dry (no vaseline) dryer lint.... instant flame
.
and then that flame would start to get the vaseline.... and it will almost act like a candle wick
the vaseline melts, wicks up the lint, and burns.....
.
then, once the baseline is all gone, you still have a few seconds of the lint to burn
.
.
.
a "cotton ball" soaked/rubbed in vaseline will burn for about 10 mins or more
and if you cant get a fire started from that..... you suck at survival skills, and are going to die (at least you tried.... GOLD STAR!!!.... but also a D-)
but ya.... steel wool WILL work (but its VERY VERY hard to get anything to catch on fire with it..... unless you have PERFECTLY DRY and VERY FINE POWERED wood)
.
dryer lint is free.... lighter..... more compact
the fero rod i used cost about 40 bucks..... but was worth every penny
.
ive started 100s of fires with it.... and it still has like 7/8s life left
also weighs about the same as a 9V battery
.
.
.
so ya.... lint covered in vaseline in a ziplock bag + fero rod is WAY WAY WAY WAY better, lighter, more compact, easier to start, burns hotter longer, ETC
.
IDK why steel wool is known by everyone nowadays....
and most buy the WRONG TYPE of steel wool (these videos NEVER tell you which "grain size" to get)
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hell, a bic lighter is smaller, lighter, and more compact that ALL of that
and also waterproof (might need to "spark" it a bunch to dry out the flint... but it will work after a while)
.
.
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you dont have to survive like 1880 when its 2023
no on is going to say you "cheated" if you DONT DIE from using a bic lighter....
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the only thing you cheated was death..... and thats 110% OK to do
@@kainhall I've done it before, and it wasn't too hard to get some paper caught with it.
8:24 I have tryed that with power bank
I have an old device that's an accessory for stick welders that generates a high (relatively) frequency to make it easier to strike an arc on old arc welding machines. I think it's like 2500hz or so. Makes it so easy to get an arc going on a lower powered machine or even combined with a tig torch with a valve on it for a poor person's tig machine.
My day is completely. I like you video . Another awesome Electroboom video👍
4:56 Something definitely arced here, but I don't think it was electricity...
lol
You're a teacher we engineers never had
Not so long ago, the pullchain switch on my bedroom light broke, so I would unscrew the bulb a bit when I went to sleep. One night, it flickered about every five minutes for the briefest time like a camera flash. At first, I thought it was lightning flashes coming through the window and then I thought I was tripping. It started flickering more often (like the vibration of the fan was screwing the bulb in) and finally my eyes were open when it happened.
1:35 some of those arcs were making it really close to the far end of the crane bucket
2:18 Mylar A, my man!