(9:38) this spoon potentiometer is one of the best physics demonstrations ever!! You can see the wire getting hotter when there's less resistance, and you can conclude that more current flows through
sure ohms law does work here but for a given temperature. A wire of a given length will have a specific resistance and this resistance is a function of temperature so a thermal runaway will result in resistance runaway till the wire breaks.
As an industrial electrician i love the way that im still entertained by your antics even though I can see whats about to happen. If these vids were around 25 years ago i would have been doing all this in my teens. Great content
I love the fact that when Medhi high fives his daughter, it makes the same sound as a fuse popping. Which in turn causes him to react with the same scream he would make if a fuse had blown. Either coincidence or an Easter egg, I love it.
saw this youtube short the other day: how to make a 300W inverter. Step 1: make a case out of plastic Step 2: add electrical socket Step 3: insert 300W inverter circuit board into case Step 4: wire to electrical socket
If you watch his videos from the perspective that everything that happens is intentional, (which I'm pretty sure is the case) you'll realize that Mehdi is a legitimate genius. Seriously.
A mild mannered engineer accidentally electrocutes himself one too many times? We are basically watching an extended supervillain origin story. I’m here for it.
A story that has been going on since, what, 2012? I forgot how long Electroboom has been making videos, nor I cant remember when was the ESD video was. Point is, it has been a long time (or short depending on yoir standards)
i think neodymium is much more resistive than copper it will heat up much more especially in the use case of this video with high current and hot stuff around rechargeable batteries or just batteries in general isnt a good idea
If you pass current through the casing of those magnets, be aware of the heat that this current would generate, and make sure that the magnets won't reach their Curie temperature, at which they'll lose their magnetic property. Best of luck to you.
@@ozonesama Oh neat, I didn't know about that! So how gradual is the degradation before that point? I guess what I'm asking is if magnets are mostly fine until a certain threshold and only tend to stop working above that point, or if long term low grade heat will decrease the effectiveness a lot too?
@@idontwantahandlethough It depends on the materials involved, I guess? I saw in that video ( ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rOgGJaO5C00.html ) that Nickel could rapidly switch back-and-forth between ferromagnetic and non-ferromagnetic, and if you know how MiniDiscs used to record data, it used a laser heat source, so it can be a very quick process, once that material's Curie temperature is reached. If you stay quite bellow that temperature, I don't think that, even by repeated prolonged exposure, you'd loose magnetism.
I hope you know you're the inspiration I needed to go back to school and learn to be an electrical engineer. Your work is awesome, and your affect on people is even greater. Thank you for the entertainment and education you continue to provide!
9:48 - Mehdi just invented a hair dryer. It's like that meme: Thinking quickly, Dave constructs a homemade megaphone using only some string, a squirrel, and a megaphone.
You forgot to list the mica paper among the interesting parts a broken hair dryer has. The mica can resist temperatures well over 200 °C and is electrically insulating. This combination makes special enough to make noteworthy. If you ever need a structural element in your heater design, mica is a good choice.
@@itzfuazz4198 This is an issue with all refractory materials, so it's a given. From silica based bricks you get silicosis. Famously, asbestos causes asbestosis. Refractory mortar is acidic and burns you lungs and eyes. Ceramic wool is carcinogenic. And so and and so forth. If you're engaged in this kind of hobby, it's good practice to inform yourself of material hazards. I, for one, think that it'd been safer for Mehdi to make his foam cutter with the mica. What kind of plastic is that clamp made of? Does it gas out formaldehyde when it's getting burned by the hot wire? You see, it's easy to overdo it with the safety cautions with just about any material. Even water can be toxic, if you drink like 3 gallons of it at once. And people have done it.
@@JoshuaNorton The wire will conduct heat slowly to its outer ends wrapped through the plastic holes but it isn't heated by current farther out than the leads are attached. But yeah, I'd get a hacksaw frame and come up with some kind of insulator to mount the wire onto it with.
Real talk im a grown adult and even I want to buy and put together a couple things from kiwico. They may be for kids but ngl it looks really fun and I love science stuff.
here i thought he would finally speak time travel and fringe like talking, since we know he watched it in 2000's era, but nope, once again no time travel talk from someone who could... lol
I fought wild fire for years.... I once heard a reporter asking another fire fighter a question about the state of the fire. The fire fighter replied: "Well, you see, the thing is... Trees are wood. And wood burns." Then he just turned around and walked away. The look on that ladies face was priceless... So good.
Hi Mehdi, the foam cutter you built is a very useful tool, yesterday I tried to build one at home using a car booster that outputs 4 amps of current and I ended up with a blown fuse ahah However I tried again with a diffent DC power supply and it worked!!! Keep making videos like these where we can learn a lot of things from broken tools
This man is a fantastic teacher. Both showing practical elements of electricity as well as demonstrating what can go WRONG in a relatively safe manner. He knows what he’s doing.
The "some fluid dynamic effect" may be the Venturi effect, increasing fluid flow speed drops the pressure , lower pressure in the tube lets atmospheric pressure outside the tube force the smoke into it...then again what do I know, I'm also an electrical engineer ;)
I'm not sure about the technical defintion of the venturi affect, or anything, but I can say for sure the root cause is the boundary conditions of the tubes. At the point where the inner tube discharges into the outer tube, you have fast moving inside flow, butting up against slow moving outside flow. The velocity of the flow can't change instantly, so you have a gradient across the edge, so they outside cannot be zero, it must have some greater-than-zero flow rate to satisfy the boundary conditions. Also, fast moving air has an inherently lower pressure, which can also work to 'pull' the air in through the outside tube. These 2 ways of looking at this could be mathematically identical, they are the same thing from 2 perspectives, or they may both share some portion of the force for the flow.
"Sucking" device based on a Venturi effect is called aspirator or vacuum ejector, or simply ejector. For example sandblasting machines suck sand just like that.
Hi, ElectroBoom, as a electronics student, videos like this really helps me to know what I can do with my electronic scraps here in my home. Great video btw
just remember to never go above 60V DC until you've learned to work safely with electronics. Over 60VDC and over 120VAC can kill you if you get stuck/touch them.
@@yutub561 ah, I always do projects (especially Arduino related) but sometimes software exhausted me a lot, videos like this helps me to not think too much about heavy electronics stuff. Just a light and slightly funny video.
@@Lbnxd as long as your fuseboard is up to date, you'd struggle to set your house on fire anyway, unless you grossly mismatched load/wire gauge/fuses. "Electronics student" implies you're, like... you know. novice. don't use more than 3 wagos per cable run or you'll cause a fire because contact resistance kthxbye
Would love to see a series of videos on CRTs. I'm interested in building a CRT from scratch. While I've researched the topic I would love to have more information on how to control the beam, how to determine the voltages needed for deflection, what temperatures are required for the heater, etc... You do such an excellent job of explaining things that a video or series of videos from you would be beneficial!
@crazysaturn0805 Or just remove the main power supply and stick straight 110v or 240v on the board. It'll protect your outlet from accidental activation and creates bonus forbidden fog too and fireworks just for fun. Lol
Mehdi, I love how you take things apart to see how they work. I feel like that kind of curiosity is something we all need to embrace and encourage, particularly among kids.
7:30 -The fluid dynamic effect is: if a Fluid gains kinetic energy, it must lose pressure...so the smoke is "pushed" by the air at atmospheric pressure into the tube, which is at a lower pressure due to the airflow inside.
That foam cutter looks extremely interesting as someone who builds RC foamies. The typical storebought foam cutters are usually a rod that makes it extremely hard to do anything but straight cuts cleanly.
In prison in the 1990s I once harvested nichrome wire from a wirewound resistor from a broken CRT television. Then used the nichrome wire to build a soldering iron. Then I could easily soldier televisions I was repairing. 99% of the time when the televisions broke it was an electrolytic capacitor in the vertical or horizontal deflection circuits. You could touch a working capacitor to the ones on the circuit board without removing the old ones and when you found the right one the picture would work properly. Then remove and replace the bad capacitor. This could be done without soldering, but then sometimes the picture would go out again and the owner would have to jiggle the television. After awhile jiggling would not fix the problem. Soldering the capacitors in place worked much better. I usually charged 3 bags of coffee, about $8 to fix another inmate's television. Another benefit was it provided me an extra unspoken level of protection. Since I was the only person who could repair electronics in my housing unit, mostly televisions, radios, and headphones, the other inmates didn't want anything to happen to me. Also I gained some trust and respect from other inmates since this was 100% illegal, but the guards never found any of my parts or tools. I had a bag of capacitors, a hex wrench to remove the bolts to take apart the televisions, and the previously mentioned soldering iron. It also helped that I weighed 235 pounds solid muscle from lifting weights 6 days a week.
You can make a foam cutter with a transformer from a old boom box, a dimmer switch to control temp. And I used kanthal wire for the cutter. I made a top out of some 2x4 and ply wood with and a brace to hold the wires with pvc. Used some other minor parts (screws and such). Works great for making foam forms to do aluminum casting
I just love how ElectroBOOM is not only an amazing electrician and content creator, he also seems like such a lovely father and has fun with his family while still entertaining millions around the world! big ups to the one and only!!!
I made a Silver melting forge out of a trashcan and a Hair Drier. strong enough to mix Brass, Melt Silver... Cant quite get gold and Copper to stay molten but made me lots of pretty aluminum sodacan bars and brass casts
Once you’ve tuned your power for your engraver, you can just make a battery pack with a switch! And if you know you can use different settings with different materials, you could use a pot or microcontroller for variable settings [the MCU option would be better for many variable options or if you wanted power monitoring too]
sometimes when the water heater bill not working, I use it as a water heater after I fill the bath and get in. Honestly great and cheap. You should definitely try it!
Years ago I repaired the fan speed control resistor in my 1985 Honda with some surplus nichrome wire I had salvaged from some appliance that died. The fan speed had two open wound resistors wired in series . one resistor measure .25 ohms and the other .50 ohms. I was able to make new resistors and replace the two broken ones. I wound the nichrome wire around a nail then slid it off and opened the coil so the wire didn't short out on itself. Worked like a charm. And this is why I salvage anything that could come in handy some day.
"Some fluid dynamic effect" is called "entrainment". It's demonstrated nicely with a Dyson fan. These things are ridiculously expensive though, and I'm not sure why, because they're also highly "planned obsolescent". I know this because I found one in the trash and fixed it. Basically it is made in such a way that a user couldn't clean out air filters when they got dirty. The air flow is eventually reduced to near zero and then it hits the trash can. In order for me to get to air filters I had to un-solder the 12 wires going to the control PCB and solder them back on after I removed the old filters. I didn't bother replacing them, - as they were made from foam (!) I mean you charge in excess of $400 for a fan with air filtration and you're too cheap to put a decent HEPA filter in it! Now it's just a compressor powered fan (and it was always just a fan, foam that mattresses are stuffed with is no air filter. So, if you're planning on wasting your hard earned $ on a Dyson fan, - now you know what kind of environmentally damaging SCAM you're paying for in order to dazzle your friends with a fan that supposedly has no blades (yeah right, that compressor inside is bellows-operated by little elves) . You're welcome. 😉
Dear mehdi .. I am writing to you from Italy 🇮🇹 I have been following you for years now and every time when I see your videos I laugh out loud .. In Italy with your facial expressions your mimicry you could have been a comedian and success was guaranteed .. Come to Italy to visit us ..
@@alessandroapicella6328 nooooooo credo siamo in tanti.. 😂 Cmq tu che sei italiano sai benissimo che mehdi in italia poteva essere il nuovo alvaro vitali è troppo troppo troppo divertente.. Ha proprio la mimica facciale del comico..
