YO! I'm still waiting to HEART a comment! in the meantime, ALUMAGNETIC FOREVER! Paramagnetic, diamagnetic or antimagnetic properties of non-ferromagnetic... sorry, ALUMAGNETIC metal are very week magnetic properties observable in DC fields, which I don't care about. They are overshadowed by MUCH greater Eddy Current magnetic forces in AC. ALUMAGNETIC focuses on great AC forces of whatever that is not ferromagnetic!

05:16: The core splits itself apart because the flux lines pass through each laminated layer. Since there is a gap between each layer, you end up having the said layers behave like like-oriented magnets, thus they repel each other

Does this count as one of electroboom’s hair-raising electrifying shocking adventures?

It’s crazy how smart Electroboom is but still keeps it funny with the fails and stuff.

I love how when I was a kid being fascinated by his knowledge in electronics and thinking he's a man of magic and now that I'm studying my bachelor's in electronics understanding everything he says and recognising circuits. When I look back I see I've grown a lot and will also be a magic man to future generations

The hobby shall heretofore be called _"metal detectoring"_ and I will be taking no questions at this time.

You sir deserve your own Netflix series. I have been entertained all day watching your videos. You are genuinely likeable.

I like your sense of humor, your integrity in owning when you make a mistake and your selflessness in promoting other KZfaq pages that also get it right. It shows you will always be about the facts

Mehdi, you did a fantastic job, covering 2 types of metal detectors (energy theft and BFO) in just 20 minutes, with no loss of fingers or eyesight. Well done, and thanks for the shout-out. As for the cross-coupled transmitter, I've used that in a metal detector design (White's TRX) and did not use any bias resistors on the transistors. You should not need them. On the transformer plates, they push apart because the eddy current generated in each plate (across the thin cross-section) interacts with the coil's magnetic field to produce a force which is the cross-product of the two, and is perpendicular to both. This means that at the surfaces of the plates, the forces oppose each other and try to push the plates apart. Hard to explain in words, easy to illustrate. Any decent EM book explains it. A dangerously impressive example of this force can be found in coin shrinkers, where a sufficiently strong EM field creates enough radial force to literally shrink a coin. If you were to do a video on coin shrinkers, I would not dare to wager that you have 10 fingers at the end. Edit: I couldn't remember the name of the force so I had to look it up: Lorentz force, where F = J x B (cross product).

Sometimes, the explosions make you forget how intelligent this man is 🤓

Finally some awesome proper electric design content we needed this Everybody love to understand how things works and how to make them using basic electrical knowledge

Comedic and electrical genius. A rare combination of talent.

For 4:56, due to the core having multiple individual pieces, each producing its own magnetic field in the same direction, it makes them repel each other. Maybe that's why core pieces are tightly stuck together to avoid vibration due to repelling.

2:55 yum, high voltage

It's actually crazy how much this kind of field of work relates to music/sound design with basic waveforms. Even the terms used are the same. Math really does connect everything.

though I had some problem with sea water It also kzfaq.infoUgkxa-FNYUOM93a388gi9a4brtSCEVmrHgJH land for finding any things very easily. (thought it would work as normal due to it being water proof within certain parts of the detector), on dry land and sand worked well. My first one, so still have lots to learn

Mehdi, this was one of your best videos in a long time!!!! Is so amazing to see the electronic circuit forming before our eyes and see all the logic behind it and the reason for each component!!!! Do more content like this one

0:57 lamp catapult

This has to be ElectroBoom's most challenging and satisfying project yet.

9:44 you can use a cheap half bridge gate driver (such as IRS2153D) with the bootstrap pin tied to ground. i've used it in this arrangement for induction heating. this way you get quick transitions & dead time without wasting power. great video!

I love all of your videos, but for some reason this one really stood out. Watching you develop different circuits, showing them and then improving on them taught me a lot on the development process. Thanks!

WOW! This video was incredible. It started out with your usual style, but going more into it, you demonstrated how educated you are and became on the topic and in the field of electronics. I love how you were able to walk through every step in the process of designing this circuit: Research, testing, refining, etc. To make something resembling what you see in stores all around the world. And still made it digestible enough for me and a lot of other people understand. You show all the complex stuff, yet explain it simply, catering to both audiences. I absolutely love your content Mehdi! ❤️🇮🇷❤️🇪🇬❤️

Hello ElectroBOOM, I love your platform. I’ve been laughing and learning from you for a couple of years now. Please keep it up! Is there any chance of getting a schematic and materials list for this tutorial?

6:24 The grumpy indian man with a bucket water heater got me😂

15:49 Mehdi you made a Geiger counter 😂😂😂

4:57 the magnetic flux is concentrated in the iron core. The separate plates are aligned with the field axis, and so adjacent plates will always have the same polarity and repel. Like lining up a set of bar magnets next to each other in the same orientation

@2:20 if you count fiber optic, we've been using infrared lasers for networking for a while now. I don't think coax cable can carry anything other than radio though.

In general I did well in school, and in school I found physics to be quite easy. Chemistry took some effort to follow. Electricity just seems like a totally foreign language comprised of multiple languages at the same time lol. I always disregarded it as something I could live without. Cut to me in my 30s now really invested in computer tech and watching LTT videos and broadening my interest in tech and I find myself needing to understand electricity more and more. Not to mention it seems to be a useful thing to know when it comes to other things like cars and homes. So I'm glad you're as entertaining as you are. I've decided I'm just going to watch a few videos of yours every day and hope I just start picking things up over time lol. Because otherwise I have no real idea where to start that won't either bore me to death or be overwhelming... tbf this one got close to overwhelming in the last 3rd as you were talking about converting all of those signals in order to make the data presentable to the human ear lol.

1:28 Detector showed us that Mehdi is made out of metal.

6:55 hertz😂

@ElectroBOOM my deepest gratitude to you, bro. I've been trying to get my 9yo son to watch more educational videos but nothing got his attention until I show him your 'electric guitar' video. I was surprised coz not only he watched the whole video, he even watched a few more of your videos! Though he was mostly laughing his ass off at your 'accidents', he did ask a few technical questions & I hope his scientific curiosity will grow. Thank you again & keep up what you're doing - the way you're doing it! 👍👏

I honestly wish Mehdi was one of my college professors for EE. Even though I graduated with a BSc in EE I still struggle with circuit design and control systems. I learned more from Mehdi videos than the entire last 2 years in college :)

I love how you've shown the process here. A complicated electrical circuit is, fundamentally, a bunch of sub-circuits stuck together. It sort of reminds me of a project I did in undergrad, and I solved each step in the signal chain by reading The Art of Electronics to get the signal processing right!

This feels like the classic electroboom type of content which I love. It's chaotic enough, it's got simple educational parts for us non-EEs, it's got some damn massive schematics that give me flashbacks for those that understand them and there's a complete working project at the end, love it

You are actually the ONLY guy that i can really trust not just making up crappy stuff to steal our time just for their sick amusement 🙂😂 because you actually really know what you are doing when making stuff. Very good and informative as always.🙂😗

Never fail to get a chuckle from me multiple times every video. And I occasionally retain information i learn lol. Thanks Mehdi!

Man, I had zero idea that metal detectors are this complicated

I’d like to see him make a voltage controlled oscillator kinda like the Original Moog Synth. Heck maybe he can make a synthesizer

Man, I saw this guys videos when he started.. What a huge improvement and he now has sponsors!!; I love it

Too bad this video didn't come out half a year ago when I started learning to design and make videos on my own DIY metal detector to originally find lost keys in the snow. I eventually decided to build a more serious project designed around pulse induction PI detector type after trying other designs and schematics but this video gives a great introduction to the principals that are used in beat frequency oscillator BFO detectors which are the simplest to wrap ones head around how it works. VLF dual coil types can detect a bit better at depth and discriminate metal types while PI mono coil types have no discrimination but detect the deepest of all three types because of a different and more complex detection method used. Professional units are always VLF or PI types, but the BFO types like shown in this video were widely used in the early days because of their simplicity and low cost of design.

16:14 Why does it sound like Geiger Counter

Fascinating, i never knew how those clicks and tones were generated, being a computer guy i just figured it was just a digital tone generator mapped to some signal and not the actual signal (if that makes sense)

@1:04 Even though I've been watching & enjoying Electroboom for years and I know what to expect, I still jump out of my seat once in a while! Bravo. 👏👏👏

I love this video. Refresh my knowledge on designing RC filter.

This is actually quite impressive. I don't know how well this will hold up to long-term use, but as a proof of concept it's remarkable. Thank you :)

The joy I gain watching you demonstrate how not to do things is the gift that keeps on giving. Seriously, I worked as an electrician for a decade and it never fails to make me laugh when shit pops. Thank you 😀

Very interesting and informative. Keep them coming!!

It’s really cool to see all of this stuff actually work

One suggestion boss, use switch , not teeth 3:00

Really loved this video. Nice to see the analog logic and math. Would love a series on this…

Exceptional and very effective way of teaching. Keep it up!

Aluminum is paramagnetic, but the funny part is that now there's a term on urban dictionary alumagnetic

Okay, I thought I understood how metal detectors worked - to the point of being confident when I sell them at work. But now... Man, you just opened up a lot to me. There are people who just want to know how the thing works, and there are people who want to "KNOW" how it works. Now I can explain so much better.

Now this is what I call quality content! Really love the in depth design process. It gave me the "why use this and not that" and the "if that is unavailable, this can also work" insight, which I find very rarely explained on other channels. THANK YOU, MEHDI!!!

I just discovered your channel. Your videos are amazing ! Keep going. Your videos are so funny. It made my day.

In one word: Amazing! The explanation and performance of metal detection made things very clear. People have learned how they work, me too!

Mehdi is no longer just an electrical engineer, he is also a sound design master!

You were going crazy with your engineering skills on this one! It's so cool to hear the technical stuff 😊 thanks for another great and highly entertaining video!

A smart Iranian. We love you, compatriot🇮🇷😎✌

This man has something hug to share.❤

This came at the best time, lol I've been struggling to build a metal detector for a land mine detecting robot, its honestly looking like ground penetrating radar would be easier to build 16:17 Wow, that's actually impressive its clicking at that distance with such a small coil. 17:35 Yeah, that's one of the problems we had, and if you're actually using it in the real world, you gotta deal with changes in soil (i.e. mineral deposits) which can throw off the coil's dynamics. What I found works good is using a microcontroller. You can use the PWM for a fairly stable signal. That's how I'm running mine, just a simple on/off circuit powered by an IGBT used to run a car ignition coil, then we just probe a leg of the coil with an analog pin. I'm still using low voltage, though. 28v, you might want to throw a capacitor in line and add a clamping diode after it or something The cool thing with using a microcontroller is that you can do the filtering with the controller and have it run a decay function that slowly increases or decreases coil sensitivity to account for changes in the environment. The big problem we're having is trying to figure out what is a piece of metal and what is just environmental noise, also the fact a lot of landmines have very little metal in them at all. I do think we are going to go with GPR though, it's just better able to detect objects underground, but before we go that far I want to try one more time with the pulse inductance and maybe a VLF

I love the practical explanation of the circuit and how it generated sound along with the oscilloscope display. I know there was product placement involved but it was also very educational and instructive. Thanks for the video Mehdi!

Man, thanks for the frequency lecture. Needed to refresh it anyway 😊

This feels like oldschool classic electroboom. I would never request you to shock yourself- but showing mistakes in a comical way is genius.

15:30 doing redstone i guess

That's the old Mehdi in first 2 minutes 😂😂 Always love your informative sessions❤

Its been literally years and his content is exactly the same I love it

One of your best videos, which is saying a lot!

Having built metal detectors with my dad as a kid, the only thing I would change is do a flat coil like an antenna instead of a regular coil. But that is more difficult to wind up. Another thing you can do to make it extremely sensitive is to have two coils, one above the other running half off phase signals and sum them in the end to essentially make an EM interferometer.

I absolutely love watching your videos, it is fun, educational and makes me realize how happy I am now that I made it into my final year of studying electrical engineering and only have 1 semester left.

I haven't seen your videos in so long that I had to check to see if you were still kicking. Glad you are and haven't fallen prey to any electricity or wayward gadgets!

So educational, and fun to watch.

Now this is a very cool and informative video. The Core is repelling because of laminations between the slits of core material. two slits have the same direction of eddy current causing the magnetic field to be generated to repel each other. Its the same as one piece of mage is solid but when it breaks the two pieces repel each other.

a good portion of my mining geophysics course dealt with metal detection at various scales/depths. it is nice to see this stuff discussed at a more accessible level.

love ur work thank u

ElectroBOOM always makes my day !

Hi Mehdi. The 24 amp maximum current of the IRFZ24N Seems massive especially if you're planning on a PP9 type, battery powered portable metal detector. I'm therefore taking my clue from this as I'm unfamiliar with the MOSFET and Schottky type of astable multivibrator you've used in this example. So I'm hoping for a Mehdi induced heartfelt like with my idea of what you're hoping for. I Do go on to mention how I learned because the learning curve was such a massive moment especially after being at college and coming no where. I hopefully explain why I'd be employing such an experimentalist approach and, if I'm wrong I was wrong but not for the want of having an estimated guess. Anyway. A two transistor BJT astable multivibrator is possibly the answer. TIP41 or TIP42 transistors should supply enough current through the 100uh + the series of the 115uh search coils. I hindsight the resistor supplying the emmiter follower regulator seems to verge around the 1 amp current region so I'm more inclined to believe this. Ditch the Schottky diodes and I'd replace them with an experimental value of around 220nf then the 150 ohms might be used in series with the search coils (in case of over load) and in their original place I'd insert something like a 2.2k ohm resistor to be used for the Resistor in the CR timing network. OR leave the 150 ohm resistors where they are to act as a voltage limit stop resistors and cut the connection between the 100uf switch spike surprising capacitors positive terminal to the 150 ohm resistors shared common connection and insert a 10k pot to change the voltage and therefore speed the 220nf capacitors charge up times. Therefore giving experimental frequency change. I'd choose this experimental method because I'm not to good with theory especially with frequencies. I have been a self taught electronics enthusiast since the age of 13 finally teaching myself digital fundamentals whilst I designed and constructed a Radio Controlled up / down step encoder into a Resistor divider DAC utilizing a toy car Remote control and receiver chip. 1 "Nudge Turn" of the remote would notch 1 up / down control on the encoder and therefore Digitally control the amount of resistors in the resistor adder and give Analogue control for the timing function of the mains cycle for the 240 volt ac bulb to dim or brighten up. Obviously timed to coincide with the correct part of the phase during the 50hz cycle. Cheers and TTFN. ;)

I was studying a metal detector to modify mine last night. Good thing you posted it and really helpful. thank you professor boom. i'd like to see its final form for next video 😅

YOU all make US laugh and learn. Im Happy that your still here..... .....you made my day😊 🎉CONGRATULATIONS🎉 🎉ELETROBOOM!!!!!!!🎉

16:19 it's like the radiation detecto sound

Amazing. Its really motivating mehdi put together this very complex circuits and concepts and show that its not that complicated. Makes me feel like i can too build and learn these awesome things.

I am by no means new to this channel. But I can barely watch these videos with him so bravely handling... Everything that he does, lol. When I saw that lightbulb I already knew. My heartrate was already skyrocketing, haha!

At 4:58, the presence of numerous distinct components within the core generates magnetic fields aligned in a singular direction, resulting in mutual repulsion. This likely explains the snug arrangement of core pieces, preventing vibrations caused by this repulsive force.

I am glad to see your videos still reach 1 M views.

9:08 just right click and click add to dictionary

As a metal detecting enthusiast, this is my favorite video, Mehdi!

bro your the best, every time i watch a video of yours i just crack up, keep up the good work!!!!

the magnetic flux is concentrated in the iron core. The separate plates are aligned with the field axis, and so adjacent plates will always have the same polarity and repel. Like lining up a set of bar magnets next to each other in the same orientation

wow, thank you medhi, this might be one of my favourite videos of yours, i love lerning about the desing proces of anything in general, and circuit design always has buffled me, but seeing you go through it made me understand how it can be done, thank you :D

It is not even two minutes in and you almost lost a finger there 1:06

after 2 years i came back to this channel and now I am amazed about myself to finally understand the technical stuff🤧

I like your videos, keep making more please❤

i rlly love how he teaches science whilst putting alot of entertainment into his vidoes.

Well that was illuminating. Especially when the light bulb blasted out of the holder! But seriously, this was a great illustration of how metal detector oscillators can be tuned and filtered. I think I finally understand how the "discriminator" on my ancient Radio Shack Micronta metal detector works. Since the circuitry is no longer a mysterious "black box" to me, I think I can use it more effectively.

You could also get a program in a smart device to interpret the signals so you don't rely on hearing and can that way increase the sensitivity of the system

Great video. Informative and highly entertaining. Keep up the good work. You have a fan in me.

9:28 I suggest you put a free-wheeling diode in parallel to the 100uF capacitor. This is just to avoid the Collector terminal of KSB596Y from going too negative by the inductors when the current through the PNP is throttled by the 2N2904 (when trying to limit the current).

This one is one of those videos of him that showed his engineering knowledge and design abilities. He make them look too easy. Thanks. Please do videos like these once a while.

9:46 Perhaps an exhaust and interior cooling fan may work? It’ll use more power, but keep it cool. Another idea is that you can just use a pump and tubes full of coolant and have it flowing around the system. And the final idea is that you can just replace those parts with your preferred WORKING parts that will stay cool and do the same thing with more efficiency. Plz heart

I wished you ve made this before cause i had a similar project "car mine detector" this year would have helped alot , btw it a great vid anyway.