Why RELAYs go BOOM!!! And How to Use Them
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- čas přidán 17. 08. 2021
- You think you know how relays work until one blows in your face!!
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By: Mehdi Sadaghdar - Věda a technologie
"I receive a shock"
Casually smiles as if it's a good thing
It inspires the science in us😁
So, yep its goood
NO! NO! NO! Many people say I am sick in the head. NOOOO!!!! I don't believe them. But there are so many people commenting this stuff on my videos, that I have 1% doubt. So I have to ask you right now: Do you think I am sick in the head? Thanks for helping, my dear ajf
@@AxxLAfriku lol wut?
@@AxxLAfriku bruh
every shock is more views XD
"Lets make an educational video about relays..."
4 min into the video: "I can make a taser out of this!"
We can make religion out of this.
That brought me back to school, where that is exactly what we did. That special pitch of the relay still makes me worried today.
@@-na-nomad6247 Mehdiism?
Michael Reeves has joined the chat
Michael Reeves is his nephew.
This guy will never die. He’ll just shock himself back to life.
Electroboom: * touches keyboard *
Keyboard: * sends a shock *
He's a bit of a professional idiot. He knows what he's doing so he can do this dangerous shit safely.
@@ZeldagigafanMatthew smartn’t
@@ZeldagigafanMatthew Doesn't mean he hasn't deadened his nerves. I'm a professional too... I once stood next to a panel holding a 18 gauge signal wire that was shocking me, all the while pondering how it had enough current to go through my PPE. I wasn't touching anything but the wire by the insulation, the current wouldn't have been able to flow any way but through me, my electrical boots, the rubber insulated mat, cement floor and finally to the ground. Still have no clue how the current for that particular signal wire was so high.
@@jeremyreese54 high frequency RF signals do not require a direct path to earth. Any large body acts as its own earth, as the AC signal is constantly charging and discharging the capacitance the body represents. The are a number of ways an active load could superimpose an AC signal, even on its DC supply, but such a condition would-be the result of bad design or very high power.
13:33 this is the most ElectroBoom-like edit ever
I designed things with relays for decades. Far too much of what was in this video I had to learn the hard (smokey) way. Adding the zener diode was new to me though and is a brilliant simple solution when faster response is needed. Back in the day I used more costly solid state relays when I needed faster response. Could have saved buckets of $$$ using $0.10 zeners instead.
*For anyone confused by the above or just now hearing about "solid state relays" just know that is the really bad name the industry gives to large MOSFETs that are packaged like panel mount relays.
Hello colleagues electro engineers, me to as well.
@@Miata822 i got it
Why did you need such fast response times?
@@SirDella really fast blinkers
"Can you imagine being entertained by learning?"
Me watching ElectroBOOMs video: Yes, I can
Man I love this dude but now I fell asleep in the middle of the video xd
Yes. I now know a *LOT* of things that I will never, never, *NEVER* do. :grin:
LoL PRO
Electrobom, BigClive, lots of retro and modern computer tech channels, etc. I've learned more shit from youtube than actual science classes.
@@KeithOlson Shocking revelation, pal.
"Soot" even the closed captions read 'suit' which made me laugh. Thank you for entertaining, electrobooming and educating us.
I heard there is a house dedicated to soot.
@@Skullair313 God rest Soothouse
I am a technician and relays are very familiar to me, but listening you explain them was most entertaining. Pick up and release voltage I did not know of, to be honest, so I learned something today!
I like that at this point you are more scared by the breaker popping than messing with 2000V open circuits
For he is Mehdinvincible
2000V at no current... If it was at least 20mA, it would instantly kill him
@@aradmnk1269 Yes
@@themoonwolf7438 No current? It's a microwave transformer...
@@proxyhx2075 2000V applies no current man.. Otherwise this transformer would melt by a "current" as you speak
“And the breaker pop”
*proceeds to clap*
😂
Thanks for the class about Relays Mehdi.
mehdi
that clap made me smile
Thank you for watching the video Abraham
@@kolegapsasasiadaodstronysz3569 thanks!
Shi h😂
It's really scaring me how fast this "Relay-Day" turned into an "I'll build a Taser-Day".
Again.
Everytime he uploads, I’m happy to know that he still lives lol
Lmao
That's really true Bout styropyro
Even more so as styropyro only uploads like twice a year
steve1989 from MREinfo offers the same experience, every time a new video of him pops up, he survived severe food poisoning.
that's legit
"A switch goes in series with the power line, not parallel." I remember having to explain that to my dad once.
If not, it becomes a fuse that only works once
@@TheEdRiAx I mean.... that is how fuses work XD
That reminds me of 8th-grade science class long ago, where during the chapter on electricity the students were told to connect a battery, a switch, and a light bulb, so that the switch would turn the bulb on and off. Several people had theirs hooked up so that the bulb was on when the switch was open, and off when the switch was closed. They ran their batteries down pretty quickly.
@@bledlbledlbledl And that's how a NOT gate works!
@@andreyrumming6842
There are fuses that can be reset.
“Dad why does the spoon taste funny?”
Süt 😁
There is no spoon
@ata yüksel I put cvm on it
Non-conductive spoons taste like burning.
Because I cooked heroin in it
this man is the only man that i know who keeps (most of) his mistakes in the video and somehow manages to make it funny
Pssst here is a "secret"...he is an electrical engineer. He does it on purpose. That are jokes. He knows what he is doing and what would become to dangerous.
@@JoshTyrReece except for the jacobs ladder
I'm an electrical engineer who did his concentration in power and had a dedicated class about protective relays. But even I learned a lot from this video! Keep up the great work Mehdi. I just wish I had a college professor like you
9:02 " My man-made relay"
*me looking at my 100% natural relay*
They call it evolution
I came here to the comments to say this, but you beat me to it!
Did you get your relay hanging from its tree like an apple or it grew to its toots, you know, like a potato?
well most relays nowadays are probably made by machines
@@MrKakaofreak just backwoords
Brilliant. I know relays really well and have used them in lots of designs yet you still taught me something regarding the continuous arcing.
They're sponsoring you too?
@@Sparkette Why should relays sponsor him?
@@Power-Wiesel Brilliant
Same, I love relays from how unique they are, too bad I only have 1 in my home :(
One random thing I'll add is that they have a lower contact voltage rating for DC than AC,because there are no interruptions to the current that would let the arcing stop. A relay designed to switch 5A 120VAC might only be rated 30VDC, and might arc permanently and burn up when "switching" 80VDC 3A.
3:10 chinese boom
🤣
I came here again after electroboom said nobody watched this. I'm kind of a hero
Somehow, building a relay using a freaking spoon is actually quite Brilliant. Yes. I went there.
Well hi😂
I guess you could say his demonstration was *relay* good.
XD
You, you, you... Your videos are very good.
Oh fuck! 🤣
But ur comment is not brilliant!
I am a Physics teacher, When a student out-thinks me I find that experience to be both exhilarating and anxious at the same time. It is wonderful to know that you and your daughter can experience that as well. Love your channel!
@hoiy vinosa i jealous you.😒
A similar thing happens in software engineering: Sometimes I will run a program with a known set of conditions to verify that the output is correct. Occasionally I will get what I think is an incorrect output only to discover while tracing the logic that the program is correct - my expected answer was wrong.
Actually, his daughter out-thinks him with monotonous regularity. It must be kinda depressing.
12:06 "Hehehe Yeah Boy" 😂😂😂
Mehdi, you are an international treasure! I've been watching your videos for so long and these educational videos are so well made. Keep it up my dude! Love your work.
I like how, even after having 2000 volts dropped on him, he still casually connects live wires to a spoon and touches it with his finger.
Notice whenever this happens he's not touching anything else with his other hand. He's also isolated from the floor. Would only feel a tingle (I've tried it)...!
I keep waiting for him to push the back side of the spoon :P
@justan idiot I believe the 2000v thing he's talking about was a while ago when he built a "Jacob's Ladder" using a microwave transformer. The device appeared to fall onto him while powered on and shocked him badly. I know he fakes shocks and other accidents to show potential mistakes you can make, but if that really happened the way it looked he's lucky to be alive. Those transformers can put out .5 A or more, they have enough voltage to force that through a human body, they can easily kill or burn tissue from the inside and they've claimed a number of lives.
@justan idiot true.
@@deltab9768 From what I remember from that video, the Jacob's ladder ended up shorting milliseconds before he touched it, probably what saved him. Then the fuse at the power outlet popped (or GFCI forgot what)
I'm an electronic engineer, trust me I learned a lot from this video... amazing work Mehdi!!!
10:50 Many relays do have a coil with a solid metal core, which means that a high frequency PWM can create Eddy's current heating up the coil's magnetic core.
2:46 This sounds like Turn Indicators in car... So I think Turn Indicators uses the same mechanism...❤❤❤🔥🔥🔥😍😍😍
Rajdeep ?
@@unknown_0047_ Yeah Bro...
Mehdi: I received a shock! **smiles in happiness**
Can't remember how my teacher originally explained relays in introduction to DC nearly 20 years ago, but I cannot imagine it was this good. Well done 👏!
I would really like to see Mehdi’s setup for keeping himself alive at the bench, it can’t just all be down to repetitive exposure giving him better electricity resistance.
6:05 My laptop charger makes this sound when the laptop goes into sleep mode. This sound is loud enough to prevent me from easily going into sleep mode myself.
8:56 he blew the electrons away
8:39 i like this little arc in this transformer when he uses it, it's always there
I loved how you tied these different concepts together. I'm an electrical tech student who is taking classes on these concepts. a good chunk of this was covered in my motor control class last semester, and I think it's great that you're putting this on youtube. if you had more of a 'collection' I'd probably be able to get my professor's attention with them (I've tried, but to them it's another youtube thing with some educational content, something more for leisure than a classroom resource, so they might watch on their own and like it... or forget)
I have done many hobby projects with relays but I also learned a thing or two from this video - like release voltage and minimum operating voltage, etc. Thanks, Mehdi!
Minimum current thru a relay contact is also known as "wetting current".
This is why you cannot use a 200A relay to reliably switch a low current circuit.
THANK YOU FOR THIS CONVENIENT TIME I'm studying for my finals and I'm having a nervous breakdown I almost cried THANKS AGAIN
good luck
@@dukati_erli8659 thank you
@Tomathy 🅥 not the time for ice cream man
@@MoslimMahmood it's a bot
@@gopalkrishnan9732 oh that's ok
I already knew a good amount about using relays, flyback clamping etc, but this still taught me even more about... certain failure modes. Always good to be aware of the various failure modes of components.
To get rid of arcs in the contacts, you can put a capacitor over the contacts. I measured the voltage over my coil one day (it was a 5V relais) and when I disconnected my coil, the multimeter said 95V. Talk about a spike coming from such a tiny coil. And even when you're respecting the proper loads over the contacts, after several years, those contacts can literally burn away. Due to the current spikes, those contact points turn black after time, increasing the resistance while still switching the same current. This increases the power over the contacts making them even hotter when switching, turning them black even faster and faster until they burn away. I've seen many burned out relais and contactors over the years while troubleshooting our stacker cranes at work and the only things that are left, are the coil and the contact levers but no contact point anymore.
1:50 I love it how his first reaction to seeing a flash of light is to squint back as if an electric shock was coming 🤣
The happiness that he didn't get socked and the breaker worked at 9:18 is priceless
Just found this channel...
Absolutely hilarious at the same time as presenting the important concepts in a memorable way.
My daughter did some electronics at college... It was unbearably dull... Till i told her how to make electrolytics explode... Then she went on a blowing things up crusade... Which was highly educational!?!?
Pure genius !!!!
Nothing more educational than putting 10 watts through a 1/4 watt resistor. You could even say it's... illuminating!
Ohms law, power law, discussions on thermal management and datasheet spects. Lots to be learned. An hour of intrigued lecturing, all stemming from a 4 cent resistor. Can't beat it.
Thank you very much for explaining hysteresis phenomenom of relay! That was new for me and very interesting. I’m interested to see more relay videos.
When the world needed him the most he returned and also I have physics test tomorrow let's see how it goes
Edit:- the test went well I got 43/50
Best of luck man 👍
All the best bro!! My best wishes are with you!! Do well!! ❤❤❤❤❤
Good luck Luigi
Good luck.
Good Luck buddy!
HORAY! YOU'RE BACK! also, whats going on with the "mould" effect! did you win!?!?!?!?!?!
Couldn't say it better! Glad to have you back Mehdi :)
I learned so much and was thoroughly entertained. Thank you!
3:07 when mehdi finds a new pain, and he love it.....
Pain fetish 😳
It is mehdi
Mehedi be like - EAU
@@bourbonbournvita tbf, he may be excited the fact that his vibranium skin has something he can test
@@bourbonbournvitaThe virgin "pain fetish 😳" VS the chad "masochist 🙄"
What made Michael Jordan a legend was consistently being great game after game. The same is true for ELECTROBOOM. Consistently great content. A true legend.
I was 100% sure for so long that you wrote Jackson, not Jordan
I love how you demonstrate a great advantage of relays: to prevent the switcher from getting shocked. Nice little 5, 12v switch to turn on 220 AC, Stove, heater...
You're videos are both highly amusing and highly informative! Love it.
Was designing a relay-related(sounds weird) circuit to drive my shift gear simulator right now and saw this video. Great thanks about mentioning the flyback diode! Nearly forgot about that. The rest of this video helps a lot too!
relayted
I commented before the video was published.
MAGIC
Time traveller!
Yeah, there is always that person asking why the comment is a day old!! PATREON ARMY!!
hacker man
This is how to do education on CZcams! Bite sized, interesting, and actually useful. Thanks for all of the great content
Lots of interesting knowledge here. Many thanks ☺️
It's amazing how I already know he's gonna get hurt before he touches something, this man is literally hurting himself so we can learn through evidence what not to do while messing with electricity, what a mad lad
This man is to electricity what Steve Irwin (RIP) was to crocodiles and other dangerous creatures 😅
No. The the electricity needs a path to hurt. And there needs to be a reasonably low contact resistance.
So if he is wearing rubber-soled shoes and does not touch anything else, the electricity does not have any path. And people with very thick skin on their fingers can also manage quite well because they have a high resistance in the skin.
But the whole idea with these videos is to make it look like fat zaps. And the best part? The fools that thinks he's a fool and do not understand what he's doing. Soo funny comment threads that may result from it.
@@perwestermark8920 if he were a fool, he would've already been dead. Didn't know that he dosen't really get hurt tho, but still what he does is amazing educational material
i sometimes dont understand what he says but i still watch cause I love The way he explains and demonstrates what he explains....!!!😂🤘
soot
So that was the reason for my old problem thanks for sharing!!!
Great class, thank you professor.
8:03 Thats why slapping something fixes it
ᵒʳ ᵇʳᵉᵃᵏˢ ᶦᵗ ᵐᵒʳᵉ
11:52 Some trivia I learned: gold is used in electronic devices like computers and phones because it doesn't oxidize and those devices want to use as low a voltage as possible. (Voltages that wouldn't be able to break through the oxidized layer on, say, copper.)
Very entertaining! loved the sound effects! Learned lots too!
Thank you for the knowledged
4:08
a good ElectroBOOM video wouldn't be complete without some form of taser.
"It is *guaranteed* to break through the oxidized layer" - then is clearly surprised when it works
thanks for this great video, together with our 3d printer and my partners experience in metal working we can make some great things with your electrical lessons. you get shocked and burned so we don't have too. and you always show the less than ideal situations as well so we can see why some things are important to keep in my mind like oxidation of the metal.
Love these subjects, as today I'm learning digital electronics, and just today I had a class about logic, i'm looking foward to the next video, it's nice to be in sync with you mehidi!! Grettings from México!
"I just didn't expect her to solve them faster than me"
Man, you're the only one who thought that
#justdadthings
12:25 You should tell us what is that awesome relay! 😎
At 10:00 you mention release voltage. Can you do a video about peak-hold driver circuits, like ones used for fuel injectors?
wow this was a brilliant video, you pretty much explained the whole datasheet of a relay. really educational!
Mehdi I’m on my third masters course and have even used relays in my work. I learned a lot about relays in this video that I hadn’t learned in school or at work. I’m very excited for your next video. You are awesome and I love your videos!!
love this part 6:13
True
*6:14
I never knew relays had so much to learn about them! Thanks for this!
It's always nice to search for relay videos, only to realise that your favourite electronics youtuber has already done a video on it. Thanks Mehdi
Only things I would add to cover in future are resistive vs inductive loads, and how to deal with hysteresis/debounce strategies for circuits sensitive to rapid transients.
I love relays! But I love solid state relays more.
How is your comment from 13 hours ago if the video came out 7 minutes ago?
@@jokubasvanagas3174 Patreon members get videos early
@@ScottsSynthStuff Oh ok
Solid State Relays are amazing. I have two of them controlling my attic fans from an ESP8266 chip
Thank you for RELAYing this information in such a RELAYable fashion! I RELAY on you to impart this kind of knowledge, and I can now go and RELAYx!
😀
Yes Mr.Boom is very RELAYiable
I use a relay like the first black one you showed to make a ignition circuit for a ~1930’s 3hp engine on a railway inspection cart made to carry about 2 people. It was missing its ignition system except for the points, and a single spark wouldn’t ignite it, so it was set up like how it was set up in the video to buzz, except it operated a 6v car ignition coil to make high voltage.
Nice Vid, I was already pretty familiar with relays, but I actually learned some stuff. Thx!
I remember watching Mehdi when I was 16 and thinking I could never figured anything like this out now I'm 19 and he's one of the main people who inspired me to take an electrician class
That's pretty dope 👍
But to be fair, electrics aint all that hard.
Just remembered how I created a similar "shocker" from the relay and the additional coil from the electric lighter when I was 10. Now I understand why I immediately liked this channel... and also why my finger twitches a bit randomly sometimes...
I remember making a "zapper" using a relay when I was around 10 or 11 -- the inductive kick can be rather significant. 😮😲😮
Thank you for relaying this information to us!
Such a great presentation sir . 🌷
@тαρ мє αи∂ ѕєχ ωιтн мє Isabel 👌🤣
4:23 Damn! Took Me a while to wrap my head around that. Only when I looked at the relay terminals a few frames earlier, did I understand.
This was so cool!
Ye
I've discovered that relays give shock when powered off in the past by own experience. Same apply to solenoid valves and other similar stuff. Also, quite a crap of unreliable technology but still very widely used due to it's unique properties.
Relays are pretty reliable if used correctly.
Yes I got many times shicked
Never had one from a relay. Capacitors...
They can bite days after use, as i found out when i grabbed a used one from my compressor run/start capacitor spares parts box
I don't buy it. They can't stay charged like a capacitor can.
Thank you for relaying this information to us
Lovely learned a lot from it
i learn more from this man than my whole entire years at school
Feels like Dave got your attention with his Back EMF episode.
Short, yet deep explanations on the how's and why of relays. Nice overview.
Netflix: Are you still watching?
Meanwhile: 7:13
The sheer excitement of 'You see I can make a novelty zapper out of this.' had me rolling although I can't say much as I'm about the same way.
For real though, I really freaking like how he can be really fucking smart, and a chaotic dumbass in a flip of a switch, mix that with him forgetting some stuff that when he remembers looks obvious, an you have a amazing channel with crazy good videos
I love this guy’s videos. Always entertaining, fun, and full of knowledge
I've learned soo much all i ever needed Thanks ElectroBoom you are the best
You know that it's a great day when ElectroBoom uploads videos.
@1:00 You welded it LMAO... You could possibly use Electro magnets to activate or deactivate this sort of switch also :-D
Nikola Tesla used auto oscilating relais in his circuits. Instead of burning away the coil spike in a diode, he discharged into a second coil, which was his primary coil.
this coil was tuned series resonant to become low impedance (so the impulses could pass).
Instead of putting the diode parallel to the coil, you could also put it parallel to the switch.
this is where Nikola Tesla placed his series resonant primary coil.
When did the university project, I wrote not only the good results but also the failures and how it is fixed. This guy does not make these mistake as a mistake, he wants to show them so you remember better. Of course if you put that diode yourself in wrong polarity you will never forget.
11:24 SOOT 🤣
Subtitles: suit
What the f-