How to Make a Shunt Current Sense Resistor
ฝัง
- เผยแพร่เมื่อ 9 ม.ค. 2018
- I was going to buy some shunts and realized I had to pay money! So I decided to make my own…
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By: Mehdi Sadaghdar - วิทยาศาสตร์และเทคโนโลยี
Hello all! I drew the 10 winners for the MEEETAAAs between Patrons and viewers! Here is the list, which I have already contacted:
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- Yes Sir
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- MyDynamik1
- Mason Co.
Have fun everyone!
ElectroBOOM How does you contacted them by email or by PM?
Oh shunt. I just missed the Electroboom Meeeetaaaaaaa.
Hey doesn't the current lags in an inductive circuit? 10:11
gimme da meter
ElectroBOOM ur videos are so good
"The Dumber you are the more likely you are to invent a lightbulb" Best quote ever
Thank u for the like! I am currently binge watching your videos! I saw the 1 million subscriber video. You should sing a song in Persian sometime! Ya got a great singing voice
This explains why my house is full of lightbulbs.
floorpizza And here I thought I was the only one! Lol
I knew Edison was a moron.
Jimmy Johnson I couldn't agree more
0:38 - realizes that the resistor's too hot to touch
0:41 - touches again
0:43 - continues to touch
His brain: touch it
Him: why?
His brain: cause you have too
Him: ouch
His brain :do it again
Him : ouch
Also his brain: do it again
Him :ouch
@@partisancrown2674 *_cause you have to_* - the thought that runs through every one person's mind before doing anything stupid
I agree
.😂😂
6:10 melts fingers
It’s burning now
*proceeds to touch burning resistor*
*procceeds to touch it 3 times in a row*
Starts cooking human finger
Mmm... BBQ roasted Mehdi
🤣🤣🤣🤣🤣🤣🤣😆
@@timmyg8888 finger barbeque
Mehdi, I just recently graduated with my Bachelors degree in Electrical Engineering. Watching your videos makes me even more proud of being a Electrical Engineer. Please keep 'em coming lol.
I can almost never understand what's actually going on here because I have such a small grasp on electricity. But I can't stop watching them. I love watching these videos, I feel like I actually learn a little bit
I couldn't have said it better
Exactly what I was thinking right now.
Yep, exactly my thoughts as well :D
Subscribe Kurzgesagt for more such things, ignore if already done.
My old electrical engineering professor always say with transformers: "Once your transformer starts smoking; it's hard to put the smoke back in."
Yeah because it means the insulator has burned off, causing short circuits in various places. There's no good way to fix that.
John Michael Stock no shit. It’s a joke
Yeah. There's a little truth on that. Unfortunately, Transformers don't have any opening to refill that smoke ;)
you let out the factory smoke!! you cant fix that!
Every electronic component works with smoke, but once it's out it's broken. And they added no refill valves because the want you to buy new parts
6:15 that looks as if it did hurt... a lot
actually from experience not that much or not at all, the temperature will be very high but for short time like a flash and something will break the circuit so just the outer layer of the skin is burned up and you you just left up with shame and the bad smell.
@@mmawad100 It's a great smell. I think the heat kind of cauterises the nerve endings too which means less pain. Or I may have just made that up.
Because it did
I'm still impressed at this mans pain tolerance. Those burns from the wire are no joke.
Happened to me yeah it's not fun trust me lol.
This video gets even more interesting once you observe the clock in the background over time.
some 3-3 and half hours of footage for 11:16 mins of video
Anyone noticed half of it happened the next day?!
yes indeed xD it goes from like 4:30 pm to suddenly like 1:30pm towards the end of the video. Time traveling much? :D
Probably somewhere at the point where he put fuckin' sear lines into his goddamn fingers. Christ
that made me feel the pain just looking at it!!
Hey All! at 10:10 I said the current is leading in an inductor, where it is clear in the scope capture that it is lagging, which is correct! Not everything on the right side is leading... time starts at the left side of the screen and increments to the right, like any normal plot!
Gimmedahmeettaahhh for being the pedantic shunthole who caugh it! :D I am a poor, unemployed engineer who doesn't own a fancy LCR yet :'(
Hi Mehdi, can you just look into a product that says it can decrease current consumption and thus reduce the cost of paying utility bills? I don't have the equipment to test it at home...
This is the box it came in
photos.app.goo.gl/OWe8679034jHoOWg2
OK , got it.
ElectroBOOM I love you man you make me laugh every day and I tried the vacuum thing but I failed but I like your videos keep up the good work
ElectroBOOM do you know anything about cathodic protection? If so could you help me on my cp1 test?
You are the Best teacher i have witnessed In a lifetime of YT education! Doing things like wire in mouth. "Shock" a ignorant brain into retaining the important information you quickly inject. You knowingly burned yourself in the same video to remind those of potential dangers. Combining Entertainment and knowledge at a fast pace. This is the first video i have seen by you , And you have earned my first ever Comment as well as a lifetime Sub!
I hope you go Viral and NEVER stop Teaching!
0:05 *SHUNT!*
0:01
@@lonely_7891 I want to make a 💩
"The dumber you are the more likely you are to create a light bulb" - Mehdi Sadaghdar
lol yeah I love it, Mahdi do it on a T-shirt I'm buying
Is he talking about Thomas Edison? Haha
Bingo !
I have the same variac, I think I'm doing it wrong. i.imgur.com/0g7FugJ.jpg
2018 A.D.
I had to watch this twice because the first time around my attention was fixated on the clock in the background, no doubt put there on purpose.
if it makes you watch twice, that was a good decision!
Clouder I was just looking down here if I am the only one :D
Clouder should get the meeter. He is making people double watch the videos. :)
ElectroBOOM can you explain why vape are exploding?
Funny I had to watch it again to look at the clock LOL
I know you're very smart. And the seemingly dangerous things you do are done knowing the limits. But my ass was puckered tight none the less when you reached for that live wire, fully knowing you were going to get burned.
I love the “Shunt” with the Metal Gear solid logo font lol
I hope that one day I find someone like Mehdi. The man's a legend
Squid SQuiddly Same..wish i had a professor like him but instead my professors were paranoid beings who wont even let us work on high power labs like power system (advance) lab,etc and our role was only to note reading while lab attendants do all the interesting stuffs!
(Walks in room with transformer and burnt fingers)
So, let's (zap) SH*** OH F***!! SH**! I was supposed to turn that off before I spoke to you.
*Shawn Scientifica* I can already hear him speaking with his accent in my head
Squid SQuiddly icu everywhere
Your face is like a octopus
6:00 min in...I'm going to use my auto-transformer that can out put some High AC currents.....(sounded like a bad idea to me, then I hear)..I have some 22 gauge wire (Bare)....then F#&%!! Sh#%!!....I laughed so hard that I nearly pissed myself...... I hope his fingers healed well, you gotta love this guy ! Smart and funny^^
Thank you for clarifying assumptions. These videos have so much value. Thank you!
electricBOOM but every time he says Shunt it gets bass boosted
dankvader 214 I need that xD
Imagine dis: ElectroBOOM but everytime he says shunt he gets shocked or burned.
@@asianboi2867 or gets SHUNT!
@@J.Crystal1248 or he has to witness his Tesla coil getting destroyed?
@@asianboi2867 Nah, this'll be devastating in all aspects ;)
Almost scared the shunt outta me.
Perktube1 Shunt the flux up.
good one 😁
Oh shunt Up
you're such a shunt head
You're a DC-head!
I can’t believe how interesting learning is ..... I can’t stop watching and the sad thing is I’m learning so much from this guy 😭😭😭 wish he was my teacher in college lol
"unfortunately im in luck" :D
7:24
-unfortunately- *AND fortunately*
It would have been so much funnier if he said unfortunately. I'm going to start using that now lol
task failed successfuly
I’m 14 and my physics teacher uses your videos, but I knew this channel since I was 12. I love your channel, it’s a good example of infotainment!
Actually the current in MOT looks like that because iron core is too small and it begins to saturate near to the peaks of input voltage. Microwave oven manufacturers try to save money as much as possible, and transformer steel is not cheap. Hope this comment doesn't get lost in gimmie shit.
UPD: to not get you confused, of course I meant "near the voltage peaks considering the phase shift between voltage and current". Thanks for likes, guys!
No it hasnt, thanks for the info :-D
Also there is a simple way to show this: take small (5-10VA) 220-12V iron core step down transformer, and slowly raise the voltage on its 12v winding with your variac, starting at 0V, monitoring the current; if the transformer is good, at 12v you will see nearly a sine wave current, but as you will go higher, the current will become more and more like shown in the video, because beyond nominal voltage the core will start to saturate.
Thankyou, i have saved your text to file for later use :-D
Dude I love these videos. People on here may think your unknowledgeable but they have no clue. I work for Eaton as an electrical tester and I can tell you know your stuff. Keep up the videos man I get great enjoyment out of them and learn a little at the same time.
I always wondered how a Graphics card could read how much current it's drawing and this video helped me under stand unintentionally...
Awesome!
I know I missed the drawing, but you still deserve kudos for a funny, engaging, informative video for up and coming electrogeeks like me. They are of filled w knowledge and humor such that I can't wait to binge watch all your vids.
John
You went crazy with the edits this time! for a guy that doesn't like post processing this is amazing!
Haven't watched in a while, but as always you are so entertaining and explain with such enthusiasm.
6:14 be safe!!!
Dude you're awesome wish i had professors like you!
That LCR meter looks awesome! I've been looking for something just like this and the one you show also have temperature measurement which I'm also in need of!
Getting that meter would make me tremendously happy!
fantastic teacher I don't have ever seen such way like this keep going man.
7:45 can u see light bulb in auto-transformer?
its the winding overheating
Sh** + Cu** = *SHUNT*
nice explanation
Next time I want to call someone a s****c*** I can just call them a shunt :)
@@untrust2033 u better not do it to me I play league of legends I'm toxic so that's a warning
@@gigaacademia9313 be quiet, shunt
Fu
The clock behind was like watching time porn. So interesting comparing the real time with the video's time. Shows how much work each video takes. Great job Mr Boom!
da Costa had to rewatch to enjoy the Travel or time.
Love your passion. Thank you for sharing the knowledge
Made myself one, work perfect. Thanks for your inspiration and burned fingers! Cheers from Argentina!
It's really, really weird that Mehdi released this video now. For the first time in my life I have needed to measure some 12V loads at greater than 10Amps because of some LED bars I'm using. This was a week before the video was released. I knew I subscribed for a reason!
I used some 12ga wire, and a couple of spare banana plugs to make a shunt to install across my DMM's 10A current meter inputs. I used a power supply and 2-ohm power resistor to put 1.000A through the current meter, then adjusted the length of my shunt until the meter read about 0.1A, with 1.0A actually flowing through it (divide by 10). I had to trim and resolder the wire multiple times, but after about 5 tries, I got to 0.098A and called it good. This allows me to make current measurements beyond the range of the DMM with reasonable accuracy (5% maybe?).
This shunt only works with this one particular DMM, and only on the full DC-amp (not mA or uA) rotary switch setting.
I don't think I would use this to measure anything over about 40A for any extended period. The shunt would start to heat, and it's resistance will increase, causing error. I always plug the shunt into the DMM first, then the leads into the top of the banana plugs of the shunt. That way, I don't pop a fuse on the DMM if the shunt comes loose.
"...infact, the dumber you are, the more likely you are to invent the light bulb" - Mehdi Sadaghdar, 2018
We need a shirt with that phrase
Tesla > Edison
‘nough said.
Raoul I
Your videos are incredibly good. I learn so much. Thank you!
Subbed and this is the 3rd video I've watched of yours so far...
You are a very funny guy, and very informative whilst happy to continually electrocute yourself for our amusement lol!
That burn in this video looks a little hurtie, hurtie though 🤬 lol.
Cheers from down under. Melbourne, Australia.
GIMME DA MEETTA!
Also thanks for the information in that video about canceling inductance .
Holy SHUNT. Those finger burns are nothing to play around with...
I have a few workable meters, but getting a decent oscilloscope would be the SHUNT. I could put that to use in my audio endeavors, particular when I have a power amp acting up.
guitarstitch O
It's all fun and all that he gets electrocuted from time to time but he surely knew this was going to happen. I would advice him not to do these things or step down the voltage beforehand so he won't get burnt and it would still be equally funny. Mehdi, I like your videos even with less explosions, just want you to be safe.
In Australia we tend to use mm2 (surface area) for thin wires and AWG for thick wires
Can't get enough of your videos. Informative and funny
I'm so excited I shunt my pants!
Who watches his videos for both info and entertainment?
Me
I
Infotainment god
I do, he's my favourite you tuber!
Thanks for all the likes!
Watch the clock in the back great videos like this takes time see the difference from the beginning to end
Dont know why I never checked out this channel but I love it.
Me: *working on a project*
My mom: what are you working on?
Me: 0:05
Me : *doing some soldering on a relatively safe project*
Mom : YoU nEeD sUm SaFeTy bOi
Me : But it's fine, i know what I'm doing
Mom : U R 14 quit the balktalk i am the authority [even though I have no idea what electricity even is]
@@technicallydifficulties7094 bro same here I wanna build a human flight system for my hands and feet for example like iron man so basically a flying like iron man project but then she says you'll get hurt like i know what in doing I have all the mats hydrogen and oxygen energy transifmromers and servos
@@Marcus-pv9le *_e x c u s e m e_*
a *S H U N T*
I'm making a sh*t
_freely transfer the possession of an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value!_
Simas Pudziuvelis he deserves it
"I want to make a s****. I said SHUNT!"
~ElectroBOOM, 2018
Probably one of the funnier things electroboom said
Can I just say, 6 years later I'm finding your videos very helpful. Thankyou for making them and while I appreciate the humour I really needed the science in it too! thankyou
Loving these more educational videos
10:10 "You can clearly see the yellow current line leading the green voltage line, as should happen in an inductor"
I'm confused. I thought current lagged voltage in an inductor, as it seems to show on the scope. Am i missing something.
i was confused about this too. ELI’s ICE and all that. but the scope seems to be showing a leading current?
@@muluskuvuch I'm not alone after all. Would like to hear others too on this. I see the scope showing a leading voltage (green leading yellow)
I think it was just a bad choice of words. "Leading" as in "being further ahead on the time scale", which translates into being late, or lagging. That's my take on it
He said it the wrong way round.
What seems pictorially leading in graph is actually lagging vs time. Think about it!
Hey mehdi sir,I am in class 12th from India and by watching your videos I have suddenly gained more interest in electronics than before , inspiring me everyday to achive my goal for a mechatronics Engineer, you are great❤️❤️❤️❤️luv from India🙏🙏🙏
Thank you for Posting this video. I buy from the store a 0.015/5w resistor and measure the millivolts across it to measure currents.
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
gimme da meeeta .
Wow you really want his meat don't you?
0:38 He burnt himself THREE TIMES! I feel stupid if I do it the first time 😂
I love you Electroboom, even if this video is old as of me writing this
hilarious education with hilarious result.. but I should thanked you because it's really deepen my knowledge about current, voltage and resistance..
I absolutely love this madman
I learn more from his videos than I learn from teachers.
Also Gimme daa mettaa.
7:25 “Unfortunately, I’m in luck” lol
He said "and fortunately", not "unfortunately"
@@user-lg7cb6sr5z I know you're right but I don't want to believe you
Half a mether
Of all of the Electrical Shunt videos on TH-cam, I chose this gentleman's because along with the theory of operation, I knew from previous experience, that I would also be entertained by sparks, fire, and burns.
This video will be very useful for my power electronic laboratory.
Actually, the current is delayed in relation to the voltage. The scope waves seems like its the other way around, but the curve that comes "first" (when looking from left to right) is the actual leading wave.
I was about to say the same thing, eli the iceman, voltage leads current in an inductor
ik everyone wants to have da meeta... but did anyone notice that he actually BURNT THAT WIRE INTO HIS SKIN?? papa was an electrician, was a little worried there that you've genuinely hurt yourself.
next video, show how your fingers healed :D
I know, that looked horrible. Like his skin was plastic and the wire melted itself into it.
Yeah I always thought all the grabbing of burny bits was more sleight of hand, for our amusement... not so sure now I kinda feel bad for encouraging this kind of behavior.
But I’ll still gladly take a meeta:)
You know, some people really enjoy to feel pain.
In almost all of his videos you can see him getting electrocuted or burned so either he's very stupid, which I know he's not, or he's sadomasochist. I bet he's having a donjon room in his house... :P
I think it's more he sets MOST of those up, yes he usually gets bit, but he designs the skit with that in mind to mitigate most of the risks. I do not think he MEANT to do this one, though. This one is probably the worst, or second worst, him grabbing the falling MOT jacob's ladder was probably not planned, either
@Step Two And A Half
Yeah, I think you’re on to it, he showed the injury because it’s NOT the norm, he got bit and wasn’t really expecting it.
another advantage of the shunt is that you can pluck the voltage off and feed it into an A to D converter, Arduino, etc for monitoring and recording.
I SOOOO wish I could like your videos a million times each!!
Holy shunt, I need those tools.
Yeah Mehdi give me the metaah! I just began going to an electrotechnician school and i need one for practice PLEASE MY MAN.
you are very entertaining....i look for your videos to lough. good job . i hate to admit how many times i created smoke signals lol thank you
Iam watching all ur videos since 4 months..awsm
WE NEED THICCNES !
lol 😝
"The dumber you are, the more likely you are to invent a lightbulb." - Mehdi Sadaghdar, 2018
SO FUCKIN' TRUE! 😎
zztop3000 ElectroBOOM is actually called: Mehdi Sadaghdar. Got it?
The reasoning at the end was the best part for me... Use with an o-scope. Thanka.
I wish you were my electronics teacher ... It would've been so fun to learn from you
3:39 What?.. He said that he likes extreme Shunt.
0:04 😹😹 i laguhed, the voice entered my stomach
I'm homeless but I carry my little mobile electronics lab with me. I have a decent oscilloscope and tools, it's a work-in-progress.... But I would really really really love to have a nice multimeter! I never win these things and even if I don't win, I still love your videos! I watch every single one sometimes multiple times, you always cheer me up. Much love!
@ElectroBOOM I don't know if it might be the mirror effect of the camera but at 10:07 the current is not leading the voltage but lagging the (green) voltage sinusoid. The only reason why you would see a leading current would be if you have a capacitive load.
Shunt up and give me presents.
SHHHHUNT!!!
It's amazing how mehdi answers my questions without me even asking 3:13
Can't avoid seeing how time keeps changing on that clock in the background!
A very cunning shunt indeed!
Almost as cunning as providing free tools to a student!
Plz
you can tell there's a giveaway just by looking at the comments
I was watching the the video to start making my own "shunts". After he burnt his fingers I thought, "maybe I'm better off buying those shunts". Thank you anyway.
Good video you got a new subscriber.
The warm shunt in the mouth killed me. So many happy memories
My very low income friend just blew up my meter. He replaced it with a $10 harbor freight one. Also Mehdi, my friend who teaches electronics uses your videos in his class.
0:44 there's a beep without his mouth moving, maybe the resistor got offended and swore because a unibrowed iranian man touched it multiple times
3:14 that circle is *SMOOTH*
Two things: ever work with transimpedance amplifiers? Seems to be an incredibly sensitive and sometimes high bandwidth way to measure current higher range too.
Two: I would love the LCR meter! Or the component tester!
GIMME DA MEETTA so i don't have to use myself as a shunt to measure current
Rohini Kanekar Awwww, look at this cute little green troll ^^
Can someone explain 4:45 to me? If both terminals were in his mouth wouldn’t there still be a path for current to flow?
his body resistance, resists the voltage, therefore no current flows because voltage is required to push current thats why signs say "DANGER High VOLTAGE" not high current.
XxMine231xX yes, but
1. The resistance of his tongue is low
2. Current will take any and all paths between two potentials (both terminals are in his mouth)
3. To me it looks like a parallel circuit: low resistive path through shunt, slightly higher resistive path through tongue
That's why I'm confused
Shane yeah current will mainly take path of least resistance and in this case it is a parallel circuit and the wire has less resistance thus meaning that he wont be electrocuted
Forgot to add the wire is insulated so he may have not touched both probes
You're right in that it is a parallel circuit and our hero is simplifying: there is _negligible_ voltage across the 2 sides of his mount, leading to _negligible_ current through his tongue. There is _some_ current through his tongue, but it's tiny because the wire has far less resistance than his tongue, and most of the current goes through the lower resistance.
I did wonder if the wires were going to come loose at that point and put the full PSU voltage across his tongue. *cringe*
Kool Video,,and good clear information,for hobbyists and tinkerers! thanks Mehdi
Love you man, you are doing a wonderful job. Thank you