New King of Magnetic Power? | Electromagnet vs. Neodymium Magnet

After playing and experimenting with permanent neodymium magnets for over a decade, it is time to take the first steps into the world of electromagnets!
In this initial video, I will run some basic tests and compare it to a neodymium magnet of similar size. Will I like the electrical version of magnets?
The F71 Teslameter donated earlier by Lake Shore Cryotronics:
www.lakeshore....
Neodymium magnet donated earlier by supermagnete.com:
www.supermagne...
My Patreon-page: / brainiac75
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#Electromagnet #PermanentMagnet #Brainiac75

[@CodeParade]

You should give superconducting magnets a try. You won't have to worry about heat or any power loss, just need a good source of liquid nitrogen. Would love to see your detailed analysis of one!

[@azgan123]

How much money would it cost me to generate 2-4 tesla on my desk?

[@DougSalad]

Yo, codeparade! Love your game, and happy to see you here

[@Speeder84XL]

I think even that "ordinary" electro magnet (without the need to build one out of exotic superconducting materials) would probably be able to get as strong as the neodymium magnets without generating too much heat, if cooled down by liquid nitrogen. Copper never really get super conducting, but it lower it's resistance really much (about 8,8 times compared to 25°C) at liquid nitrogen temperatures.

[@CoolAsFreya]

Even just submerging these commercial electromagnets in liquid nitrogen would allow you to significantly over-power them without them heating up and loosing efficiency

[@tf_d]

Hi CodeParade! Loving your new game :)

[@Purple431]

The King of Magnetism is Back!

[@milespeterson5049]

I love making those little homemade bolt electromagnets in fact, If you give the electromagnet more current it will get hotter. More Voltage = More Strength | More Current = More Heat. I even tried to make an electromagnet oven by giving it around 5v DC 2 amps. this gave the magnets a fair amount of strength. but they got very hot. I was almost able to make toast with my oven! They even have induction cookers that are just a giant electromagnets with lots of current. It's fun to experiment with this kind of stuff! keep it up Brainiac75!!

[@stevelacher8092]

Great video. This gave me inspiration to prepare some electromagnets for use around the shop. My son wanted to make a solenoid engine for a class of his. Running the math to look for more power we found a honey comb array of smaller core and coils had a lot of advantages. We never built it though. His teacher was happy just with the math Thanks again for the video

[@prachayaputtapanasub1113]

Some permanent magnets can also turn on/off by bend their flux in the same direction or opposite direction.(you need at least 2 of them with electromagnet material to make the magnetic force go in loop when turn opposite direction for turning off.)

[@sdjhgfkshfswdfhskljh3360]

It is interesting what is the process of DIY making of permanent magnet with electricity. Or fixing of existing one, which lost its properties.

[@theschwag]

A quality experiment to entertain before bed. Goodnight, Brainiac75.

[@SpaceStickwithSpaceTick]

Reminds me of Codys Lab crazy electromagnetic that used a whole bunch of car batteries in series. If you want scary amounts of magnetic strength you need scary amounts of voltage and heat generation.

[@m.j.r.technologyreveiws1075]

Use the Neodymium magnet for lifting, and the electromagnet to disable the magnetic field for releasing the object.

[@cyfralcoot65]

There is a rare type of magnets, that are switchable on/off like an electromagnet, but dont need power and act like constant magnets. I built one this year and I very like it. Would be nice if you made a video about this

[@jimbailey8515]

Could you use an electromagnet to open a Sentry safe? Multiple videos using neodymium magnets.

[@FellaMegaOld]

The shape of the magnet matters, try a cone shape without the point, 40mm dia base with 10mm tip, enjoy the power of a focused magnetic field :)

[@razerh0]

Could you please create a coil of wire and pass it over your largest magnet and measure the current/voltage? Perhaps some magnets at the blade tips of a fan, turn it on and see then if speed matters?

[@sextoyrepairman1621]

You should try lower voltage like around 1 to 3 volts at 75 amps

[@olivier2553]

I am nitpicking, but can you really over *clock* something running with DC? I enjoy your videos, thank you.

[@S115T3CH]

Theoretically if I made an electromagnetic sole for a shoe would I be able to walk on metal things at a upside down or vertical angle? If not why? Also loved your video G

[@freedomer342]

Can you do levation with the electromagnet? like make different object levitate and how big of an object can you levitate?

[@felixb.1756]

Try a microwave oven transfomer cut in half just 5A dc on the primary make a really strong magnet

[@Robothut]

I had fun with the same style electro magnets, building bi ped walking robots based on a patent from 1891. I can share the youtube links if you want or you can just search for , Robothut electromagnet robot.

[@nommy8599]

How does this compare with the electromagnets currently being installed in the ITER experimental fusion reactor? There's a lot of info for ITER - I'd be interested if you would check it out and do a comparison with it like you did with the Earth's field.

[@oglebydidit4555]

Are there any small magnets that could attract through 40mm thick wood? I'm guessing not, but thought someone on here might know.

[@nyinkercom]

If I had two of these, can I make them attract and repel themselves by playing with power polarities?

[@MrRinghoe]

Prøv med en dør-holder elektromagnet. Den bruger ikke strøm længere, når jernpladen på døren er oppe mod spolen på væggen. Men holder stadig magnet feltet, til det frigøres med en lille knap. Tak for mange gode videoer. . . . Mvh Petter

[@chupamishuevos303]

can you put the electromagnet in dry ice and see the performance??? or liquid nitrogen

[@kathiacoronado1312]

how much did the dumbell weigh?

[@LabCoatz_Science]

Could we all just take a moment to appreciate the quality put into these videos? Truly amazing, keep it up man!

[@brainiac75]

Thank you very much! I was under an unusual time pressure for this video since I basically got carried away with the number of experiments testing an electromagnet for the first time. Truly exciting and enlightening for me. But I always aim for quality over quantity ;) Much more to come!

[@LabCoatz_Science]

@@brainiac75 I can resonate with quality over quantity: something I've tried taking to heart on my own channel. Can't wait to see more, keep it up good sir!

[@seionne85]

@@brainiac75 I can't wait to see what it can do with a cooling system!

[@Bluecat-xf8ic]

@@brainiac75 hi

[@mariastanford5701]

@@brainiac75 Can you build electromagnet using different core materials?

[@DrakkarCalethiel]

Overclocking an electromagnet and colling it with an AIO. Are we now at LTT? 😆 Biggest gains on that magnet would come from cooling it down with LN2. Would be a great vid, temperature vs magnetic strength vs power draw. With that tesla meter of yours, it would be very interesting to see that curve!

[@prohunter717]

Wonder what the differences are in cinebench before and after overclocking.

[@eklhaft4531]

The black stuff on top may crack in liquid nitrogen.

[@jeffslade1892]

Laboratory LN2 has largely been replaced by Peltier pump. With a Peltier we do not need to go down to -196° but merely remove the heat the power in the magnet is dissipating. The electrical resistance will always produce heat and the magnetic field will add to the impedance because it counters the potential voltage (delta V). The electro-magnet needs to dissipate heat at the same rate it creates it to remain at equilibrium. Unit of heat is Joule, rate of heat is J/s = Watts. We need a Peltier pump that cools equal to the heating. Another power supply and a suitable Peltier.

[@islandfireballkill]

Cody's lab has done a video of cooling an electromagnet with LN2. It works great: kzbin.info/www/bejne/j53IlaWDrtSkndU

[@bubba99009]

A lot of times when stuff is advertised as "12V" they actually mean something more like 14V because that is the kind of voltage it would actually see in an automotive application and most 12V applications are automotive. Could explain some of the wattage discrepency.

[@primus711]

Most are not automotive at all not even close and 14.4v-14.6v is more accurate in automotive when using a alternator with no load and that can drop fast depending on load and alternator etc

[@ryanroberts1104]

@@primus711 13.8v is considered "standard" alternator voltage, the way 120/240v is standard in the house. Yes it can vary up and down a bit but that is a good average to use for ratings. There is however much usage of 12v outside of automotive applications. In those applications they really do mean TWELVE volts! Things like massive servers have a PS that outputs about 12.2v @ 100+ amps, voltage always adjusting to meet demand and stay at 12v. 12v is also heavily used for all kinds of control circuits - I think one of the uses of these magnets is to lock doors remotely, such a system would likely use a 12v power supply. If it was made in china, I don't care what it is or how much it cost, the specs are not reality.

[@lunam7249]

watts = {(volts)^2 }/ohm

[@jetseverschuren]

The magnetic strength doubling with a 4 fold increase of wattage is logical. The field strength is linear with the current, and the current is linear with the voltage. Since P=I*U and I and U both increase linearly with the field strength, the power (wattage) increases quadraticly (or the magnetic field with the root of the power). To combat the heating issue, set your power supply to "unlimited" voltage, and limit the current, then the field strength will stay constant (even though it still heats up a lot)

[@brianperreault6652]

I'm an engineer that designs linear motors with permanent magnets. Your testing of the open air magnetic field does not represent the lifting power of the electromagnet. If you put the electromagnet against a flat piece of steel with a gauss meter in between, you would measure a much higher field. Note that the steel plate should be thick to get the highest measurements (10 mm thick is probably enough). With the electromagnet in the open air (no steel plate), the magnetomotive force must be distributed across the air gap between the center circular pole and the outside ring pole. If you put those poles against against a flat steel plate (steel has high permeability), the air gap is much smaller, and you will end up with a much larger field (probably around or over 10000 Gauss, approaching the saturation point of the steel pole in the center). When you use the neodymium magnet against a steel plate, it's large magnetomotive force is mostly spent creating a magnetic field across its own (low permeability) interior -- its own material acts much like an air gap. It's magnetomotive force is so high, however, that it can create high forces. I would suggest that you perform a lifting test with the two magnets, and see how much weight you can lift with each one. Hang your magnet from a strong support with the poles facing down on the electromagnet (it looks like the electromagnet may have threaded holes for this purpose). Stick a thick (1 cm or more), flat piece of steel to the bottom of the magnet. Add weight to the steel until it falls off. That will give you a much better idea of the lifting capability. Repeat with the Neodymium magnet (You will likely have to use a clamp to hang the Neodymium magnet, or you can just stick it to the bottom of a thick steel beam or plate). The electromagnet will have high attractive forces with a small gaps, but the force will fall off quickly with increasing gaps. The Neodymium magnet's forces will fall off more slowly with increasing gap. When performing the same test with a thin sheet of steel, the sheet of steel will saturate (it has high permeability for only about the first 20000 gauss, and then saturates), and you will get much lower attractive forces. Good luck!

[@gabiold]

One of the measures of a good quality holding magnet is how smooth and flat it's surface is. The better quality ones are ground better. The same applies to the steel plate, so a machined/ground one is WAY better than a rusty cold rolled steel bar.

[@kennybruce2597]

How crucial would the remaining air gap be? Because you could even go a step further and use something like heat sink grease to eliminate the air. The only drawback is if you even look at the stuff it gets everywhere.

[@gabiold]

@@kennybruce2597 Not the presence of air specifically makes it weaker but the distance between the steel plates, the lack of ferromagnetic material.

[@GQuack]

Electromagnets are interesting in their own right, though happy to hear that passive neodymium magnets beat them out in some cases! Great video as always.

[@izzieb]

The truly strongest form of magnetism is produced by your enthusiasm for magnets. It's what keeps attracting people back to your channel.

[@someone8944]

100/10 nice

[@TigTex]

Please don't say "overclock" when you are only changing voltages and currents to values out of spec. The correct term is "overvolt" Having said that, I've enjoyed the video! Let's see what the future brings for that little magnet-on-demand! Cheers

[@protocol6]

The electromagnet has the advantage of metal cup to close (concentrate) the magnetic circuit. If you gave the neo magnet a similar cup it would increase its holding force, further increasing its advantage. A lot of fridge magnets do this so they can use cheaper ceramic magnets that wouldn't hold without the cup. flexible sheet magnets do something similar by alternating polarity in stripes. You should also look at switchable permanent magnets as they have feature parity with electromagnets.

[@brainiac75]

Yep, didn't have time for it for this video, but I will try to source a 50x30 mm neo magnet (preferable grade N52) and a potted 50x30 mm neo magnet. Would make for a much better one to one comparison. No doubt that the neo magnets will still win though. Thanks for watching!

[@TheExileFox]

@@brainiac75 Could you run some experiments on hybrid magnets? (Electro-Permanent Magnet)

[@Bob_Adkins]

I have some pretty thin 30mm neo magnets that are in steel cups, and it does make a huge difference. The manufacturer didn't have to bother with gluing them, it's almost impossible to get them out.

[@bitonic589]

​@@brainiac75Also, electromagnets can be much more compact. An electromagnet can be much stronger for it's size than a neodymium.

[@sophiophile]

You can get "switchable" permanent magnets as well, where you turn something on top to change the positioning of two magnets to cancel eachother out in the off position. (I'm sure you know this, but since you mentioned the ability to turn off as the main advantage I thought I'd add this comment)

[@brainiac75]

Thanks for the reminder! I do need to make a video about the magnetic lifters - and even build my own using permanent magnets to demonstrate how they work. So many videos to make - so little time for it :D

[@sophiophile]

@@brainiac75 Well considering your upload cadence, you are doing very well when it comes to views/subs- so no rush.

[@lenselinkberinge]

Like the way a magchuck for a mill works

[@sophiophile]

@@lenselinkberinge yeah, the ones for welders and millers are usually top notch, since they have to be for safety reasons.

[@TwinShards]

@@brainiac75 Make the first, and biggest neodinium switch. I'm sure turning the lever would be hard 😂

[@BlackHoleForge]

That was such a good safety tip. I would have never thought about needing a UPS for your lab bench power supply.

[@flappingflight8537]

There is a trick with electromagnets , which allows you to reach higher pulling force than any permanent magnet is able on , without overheating of the coil . You need to grind (as fine as possible ) electromagnet’s poles and the metal surface on which you want to lock them . Than use capacitors battery ( you may need ultracapacitors ( also known as supercapacitors or ionistors ) ). Charge the capacitors battery to few times higher voltage than the electromagnet is rated for . Than discharge the capacitors battery via the electromagnet’s coil . The enormous current pulse will create enormous magnetic field . The interesting part is that this field doesn’t disappear or weaken in the magnetic guide after the the coil current is disrupted so there is no any reason for heating and the magnetic guide loop can stay closed infinitely. You can open it by applying the same amount of current but with opposite polarity of the voltage on coil terminals . You can see such experiments in the following video kzbin.info/www/bejne/qV6Yd4B8r7iDj7c unfortunately on Russian language . By the way the strongest magnetic fields are archived by electromagnets !

[@michietn5391]

What about heating in the electro when holding a load (poles connected with Fe object)? What about advantages of electros vs Neos in generator or motor applications (control vs economy)?

[@johnwright8814]

You didn't reach the magnetic saturation of the core. You could plot that, to the point that increase in current no longer increases the magnetic flux. That point would be good to know.

[@dinitroacetylen]

It seems peculiar that you focus so much on wattage of an electromagnet. The magnetic flux you get is proportional to current times number of turns in the coil (at least until you reach magnetic saturation of the core). If you rebuild the graph at 4:35 with current as the x value, you'd get a pretty much linear plot. So, if you want power efficiency, you need to minimise the coil resistance. Use thicker wire gauge, and/or employ some radical cooling (dry ice or even liquid nitrogen).

[@SuperBrainAK]

because amperage is directly related to magnetix flux. how else can your clamp meter measure current accurately? 😉 good comment, cheers!

[@InssiAjaton]

Your electromagnets brought some memories. When I first got to deal with the math of electromagnets, I decided to try some optimization of my own. To my frustration, the math "converged" always to the lowest number of wire turns, using heavier and heavier gauge wires. In fact, my end result was that a single turn of wire that filled the whole available volume always produced the highest magnetic flux with least resistive heat. Of course, the flux density is determined by the air gap, as long as the core does not saturate. Your probing showed well below my usual assumption of 1.2 T (tesla = 10 000 gauss) to 1.5 T field density saturation for ordinary magnetic core materials. So you would be able to push beyond the neodymium field density with a single turn winding and maybe 0.1 V / 200 A supply without excessive heating, if you can provide such a supply. (0.1 V x 100 A = just 10 W).

[@sarahconner9433]

My post pH.D E.E. says..... Your right!

[@NEW-WATER-ATTRIBUTES-2023]

Hey there , I need to pick your brain as to me you have my answer somehow I am searching for...what do you say? Can u help me

[@NEW-WATER-ATTRIBUTES-2023]

Can u help me

[@InssiAjaton]

@@NEW-WATER-ATTRIBUTES-2023 I am not at all sure what exact help you would expect. I just have one idea that may be easier to implement than, say some superconducting suggestion. It is to make your coil of copper tube, such as the one used in air conditioner heat exchangers. You could find that kind in most any big hardware store. Then you would need to insulate the tube, with for example heat shrink tubing before winding it to a coil. An alternative would be some insulating spacers mounted between coil turns after winding, I assume you would already have insulation around the iron core. With appropriate fitting(s) and a pump, or just tap water, you could reduce the temperature rise to negligible level, meaning you could use much more current. This kind of arrangement is used in flameless - Eddy current - annealing heaters. In them, they don't need insulation, because they have the coil stiff, just air core magnet, maybe 2 or 3 inches inside diameter, 3 to 6 inches long. I assume you would want DC use, and a more compact structure, with a U- or maybe E- shaped iron core. However, keep in mind that any iron core eventually saturates, and after that any increase in magnetizing current causes only field increase at the same rate that results in open air. All that means, initially the iron core effect is good and strong, but after saturation level, FURTHER INCREASE tapers off. I hope this at least gives you some idea what to consider, or try next. As to the source of current, somebody already suggested using car batteries. Just pick some with a high cranking current rating (like 600 amperes or more). The cranking current rating is for relatively short times, so you still might need two or more in parallel, if you want more than about 10 or 20 seconds duration. And of course, the cables from the batteries to your coil must be thick and short. I would suggest 0 or 00 size welding cables. 0000 size could handle over 600 A long term, but I don't think any practical batteries would. Finally, you would need a really big switch to turn your current on and off!

[@NEW-WATER-ATTRIBUTES-2023]

@@InssiAjaton pass me an email I send you something ,pls be quick

[@Quickened1]

Magnets happen to be one of my favorite subjects. I believe if the core were taken out and shaved to half its diameter, and then rewound with more windings, you could potentially double the gauss output with the same volume. Can't wait to see you build some of your own! Imagine the ones they use in wrecking yards to lift entire cars, the possibilities are endless. Speaking of turning on and off, I have seen some permanent magnet gadgets that turn on and off the magnetic field by flipping a lever. What's that all about? Great video!

[@geometrydash-krokoo-6503]

In these gadgets there are 2 permanent magnets. If you flip a lever polarity of one of them flips cancelling each other out.

[@Quickened1]

@@geometrydash-krokoo-6503 cool!

[@PauloDutra]

Would be nice to see it cooled down with LN2!

[@w8lvradio]

Could you Please do an MHD experiment with one of your neodymium magnets, which is beyond my financial means. See my MHD video, channel is same as my name. All the Best!

[@deevnn]

You just need to buy a larger electromagnet...Ebay has one that is 12-24V (6X2 inch diameter x height) 1200-1500 lb lift for $350.

[@MrFmiller]

Would be interesting to see how using various power supply wave forms affects the strength of the magnet. Is the relationship linear if say pulsed square or sawtooth wave DC is supplied or is there a relative gain or loss in the resultant magnetic field?

[@martinshoosterman]

wouldn't you just end up making a speaker at that point.

[@MrFmiller]

@@martinshoosterman Perhaps but other effects might be observed as well, such as linearity of attenuation, affect on input current to magnetic strength at different amplitudes and frequency, or any unexpected effects. It might answer the question you ask.

[@lasersbee]

Good informative video and tests. OverClock ??? OverVolt, OverCurrent or OverWatt sounds a lot more accurate... No clocks or Oscillators are involved... ;-)

[@wormalism]

Has the term "overclocking" become an accepted idiom for everything now regardless of whether there are any quartz crystals sending any clock pulses or not?

[@jedimasterted4712]

I thought for a while how i could compare different magnets strengths with something carried everyday. Soooo i use a standard bic lighter standing up with the magnet flat on the same table. From how far away will the magnet pull over the lighter.

[@shrikedecil]

Try using the electromagnet as an **AC** electromagnet. Can your power supply vary the frequency? Opening magnetic effects to non-ferromagnetic things = interesting.

[@alexanderthomas2660]

The problem with AC is that it will heat up the magnet even faster due to eddy currents. I once made a similar hand-made electromagnet as in this video, and hooked it up to an amplifier. It didn't take long before the bolt started to melt the insulation of the wires, it was hot enough to boil water.

[@brainiac75]

The shown lab power supply is DC only, but I do have a 12V AC power source. Could be fun to test how an electromagnet designed for DC would work with AC... Thanks for the tip and watching!

[@mernok2001]

@@alexanderthomas2660 Use transformer sheets for the core.

[@TheVexCortex]

You probably don't want to use an all-in-one cooler, as the pump motor is in the cold-plate, and the electromagnet would probably interfere with its operation.

[@nigeljohnson9820]

The most powerful magnetic fields are generated by compound coils, admittedly using super conductors. If electric vehicle development is not to be limited by the availability of rare earth elements, then motors must use electromagnet field generation, rather than permanent neodymium magnetics.

[@roycezaro1998]

I love the inclusion of "sketchy" and "seems legit" memes. You only couldve made it better by calling it SUS

[@james10739]

You should try liquid nitrogen and a lot more power I remember Cody's lab testing some wire in liquid nitrogen and the resistance dropped to almost nothing

[@Gubby-Man]

After you try to overclock with a PC AIO cooler you should go all out and overclock with liquid nitrogen.

[@crazyoreo9454]

Guys in the future our electromagnets will be water-cooled, braniac is making a breakthrough 😂

[@cosmefulanito5933]

You can't overclock it because there is no clock.

[@dr.hankins4682]

Please put the electro magnet in liquid nitrogen

[@LukeDeGraff1]

I second this

[@fangthewarrior]

I made my own electromagnet recently out of an old microwave transformer. Using a couple old car batteries it got hot fast but it was so strong with that much current, the shovel would instantly stick and not come off until the power was disconnected haha It was fun trying out different ways of powering and messing with different sizes of transformers

[@GlenHunt]

I sense a monster neodymium versus monster electromagnet battle coming up, maybe like King Kong versus Godzilla??

[@filenotfound__3871]

just came across my mind: what happens if you put a magnet on an induction cooker?

[@primus711]

Overclocking is definitely the wrong term used here over powering is correct term

[@SuperBrainAK]

YES! more electromagnets!! That is pretty cool. I think you should give a microwave transformer a try, easy to get and you can cut out the secondary and put 2 primaries into it for more coils!

[@Zenodilodon]

If you have a chance look up " Professor Eric Laithwaite: Magnetic River 1975 " I think that will fuel your creativity a bit!

[@victoryfirst2878]

What is the deal with electromagnets. They need to go into modern age and make more magnetic attraction. PERIOD.

[@Alley00Cat]

What? 😂

[@TwitchFast]

If you want to try cooling the electromagnet with a PC AIO cooler, look for something with a pump that's not in the waterblock, I can't imagine it will pump very well if at all with an electromagnet stuck to it.

[@PiratCarribean]

Next test some of those magnets with an on/off switch. Made for fixing and lifting stuff.

[@brainiac75]

Yes, I do need to test (and make my own) magnetic lifters that can be turned 'off' using permanent magnets. Interesting subject and gives the permanent magnets one of the advantages of electromagnets ;) Thanks for watching!

[@JustPyroYT]

Great Video👍 You never disappoint us with your content! :D

[@Stat5]

Neodymium fan vs electromagnetic enjoyer

[@RalphShephard]

You might like to read ‘Magnetic Venture” by Audrey Wood. All about Oxford Instruments and the development of big magnets for NMR and later super cooled magnets for MRI scanners.

[@headClock]

Would enjoy electromagnetic stuff!

[@phantomdeluxe9680]

I think it consume more power when use on metal 😂😂

[@EgonSorensen]

It would be interesting to see how high the field strength can go if you can supply a pulsed DC power to the electromagnet. - the 8W magnet is average power, and just as with lasers and LED's - pulsing with a low duty cycle should give a high(er) peak-output power... Playing with Power - Pulsed Power Push/Pull'er (or perhaps not, the iron core has a B-H curve, so it's possibly not reacting fast enough) 2*12V car batteries and a beefy relay (w. rev diode protection) controlled by a variable oscillator might be safer for your power-supply ;ø) Looking forward to future videos on these pucks - btw, where did you buy them (and the Radiocode meter, etc. - links/info would be appreciated)

[@brainiac75]

Interesting. May give it a thought, though back EMF and basically running a DC magnet as an AC magnet may get me in trouble :) But I will try running it on AC in a future video. Just to see what happens with heating, field strength etc. I am a total noob when it comes to electromagnets... The electromagnet was bought from Conrad Electronic.

[@EgonSorensen]

@@brainiac75 AC is alternating current ;ø) - so the magnet will also be alternating its poles. Magnetic Hysteresis then becomes an issue (problem), as energy is spent turning the magnetic domains inside the iron/magnet. Less emitted field pr unit energy spent. Pulsing the magnet with DC - ought to strengthen it, as the h-field moves up-down without having to rotate. Wikipedia has good illustrations of this. This should (I think - not 100% sure) strengthen the field when powered on, and still remain magnetic when power is off. I could build you an electronic switching device for pulsed DC + tell you a bit more (I'm an electrical engineer + radio 'everything'). I live quite close to your favorite sweets-store, if you're interested :ø) - and I have some time on my hands, electrical components + equipment, and I'm curious what your Lake Shore Teslameter reports. (er også bidt af en magnet og deres mysterier)

[@lotychannel6126]

maybe cool it with liquid nitrogen? and try to overclock it a LOT

[@Basement-Science]

It wouldn't be as impressive as you probably expect. Magnetic Saturation will severely limit what you can get out of a magnet like this.

[@BRUXXUS]

Oooh! This is fun! I'm particularly interested in how active cooling could affect it. I've been wanting to try building a little Gauss/coil gun for a while, and have been curious if cooling the coils could improve performance, but haven't been sure how much, if any difference it could make. (been thinking of using a Peltier cooler to get them quite cold)

[@vincernio]

Funny my first thought with the electromagnet when I saw its performance was - what if it was cooled and you over-volted it? And of course the next thought was - what if you cooled it with LN2? Also I think it would be neat if you could get your hands on a bitter electromagnet or maybe collab with a bitter magnet manufacturer. I think the current record for man made magnetic fields is a bitter magnet rated at 45.5 Tesla (455,000 gauss). Would be super cool to see you experiment with one.

[@exenavena6614]

0:37 "Becareful near strong magnets, dont let them near you fingers" next shot is him holding the electro-magnet

[@bastienx8]

Wouldn't it be possible to weaken the force of a neodymium magnet by placing an electromagnet behind it with the reverse polarity ? This way you would have the full holding force without any power and have the ability to detach the object by temporarily powering the electromagnet

[@BlackHoleForge]

If you're using an all-in-one to help cool off the electromagnet, won't the magnetic field of the magnet interfere with the pump's ability to switch one and off.

[@martinshoosterman]

I'd really like to see you make your own electromagnet, that is as strong as you can possibly (and safely) make it.

[@zibbazabba905]

0:52 How much difference does it make how nicely the wire is wrapped?

[@Basement-Science]

Not much. Wire length that is not going around it just doesn't add any strength, but adds a little bit of resistance and heating.

[@simonruszczak5563]

Making a a hybrid of the two would have novel properties, like being able to turn a permanent magnet's field temporarily off, or able to steer its direction. Hybrids are used in load speakers and bidirectional solenoids.

[@EquaTechnologies]

=== Electromagnet === Pros: -can be turned off Cons: -needs electricity, which some of it is wasted into heat === Neodymium Magnet === Pros: -doesn't need any energy Cons: -cannot be turned off

[@ProfessorV.]

OK, sorry to be critical, but "over-clocking" is when you run microprocessors above their rated base frequency for faster computing but at the risk of reduced processor life from overheating (unless you can manage the extra heat through cooling strategies). What you should be saying is "over-currenting" since you're increasing amps and therefore power dissipation. Amps are what contributes to your MMF (Magnetomotive Force in units of Amp x Turns). As your coil heats up, the wire resistance will also rise, causing your electromagnet to operate less efficiently. Additionally, as your iron core begins to saturate, more and more current will only generate excess heat with no appreciable increase in flux so there's a point where more current proves counterproductive.

[@w8lvradio]

CHALLENGE I'd like to see you use your super magnet in an Magnetohyrodynamic (MHD) experiment. All the Best! 73 DE W8LV BILL

[@tek4]

Alot of people underetimate the power of electricity and magnetism even tho examples of each are all around us every day. The same with lights and lasers. But we at least can have fun with this stuff safely.

[@brandonlu4068]

I love how we are both thinking about water cooling the electromagnet. But do watch out for the magnetic impeller inside many all-in-one cooling solutions. It might be better to get a custom water cooling loop.

[@TechGorilla1987]

@1:37 - "...with my first lab power supply." I know this wasn't a joke, but considering the stuff you show off, this made me laugh out loud.

[@pitersoft54]

From my experience low wattage high pull force electromagnets have a wierd tendency to start pulling objects only from VERY close distances. I am not sure why.

[@mernok2001]

Try cooling it in liquid nitrogen.You could overload the wires,probably more than 30 Amps/square millimeter for copper.

[@ShadowzGSD]

wondered when electromagnets would appear, now i can't help but wonder how bad it would be if electro meets neodymium

[@_2isnotavailable]

Can you make a video about magnets slowly falling down when put near a copper or aluminium sheet? I have a small HDD magnet and experiment with this, but now I want to see what will happen with your more powerful and substantial magnet. will it fall slower?

[@tarehjernetarehjerne4082]

I would like to see you try to use AC magnets, just doing a few experiments you have done before but with an AC magnet, at varying frequency.

[@russchadwell]

My problem is that a homemade coil electromagnet having an iron core turns the iron core into a "permanent magnet" in only a few uses. This defeats it being able to let go of things as needed. Is the magnet you show truly on and then OFF regarding magnetism!?

[@anthonyshiels9273]

If you have 2 x 1000 pound pull-force magnets in the same building you have to plan your route VERY CAREFULLY if you are going to move them.

[@hammockcamping2500]

@Brainiac. Have you seen the high-tech paints and reflective materials that radiate heat out to space and can be cooler than the ambient temperature even in the sunshine? Would you do a science investigation of this phenomenon? Could you make a shed that gets its cooling from a radiative cooling system? Perhaps radiative panels could be on the north roof and photovoltaic on the south. The shed could have an insulated 55 gallon drum of water to store chilled water. Alternatively... Would you do a science investigation or review of magnetic water treatment systems? A side-by side-test of a control vs treatment test for calcium deposits would be awesome. Also could you discuss the science or pseudo science of the claims made by advocates of magnetic treatment systems? My family bought a magnet for $400 in the mid 90s to treat the incoming water. It was being promoted by a multi-level marketing scheme. I've been skeptical, and would love to see a critical investigation. Could you do a collaboration with one or more of the following?: (Project Farm, Cody's Lab, Practical Engineering, Smarter Every Day, Mark Rober, Nate From the Internet, TheBackyardScientist, SmarterEveryDay, NighthawklinLight). Project Farm is really good about testing products' claims. Cody is brilliant and creative in a science and hands-on way. Actually any of you could do a great collaboration. Also, if the claims made by the water treatment folks are false, please humiliate them publicly.

[@trusoljia87mrjcazz76]

Braniac75 Can you re run this test using say a 220lb or even a 400 lb electro magnet vs the same neodymium magnets?? I have an N52 cube that's 1 1/2 inch x 1 inch 1/2 all around deminsions, it has 234lb force I like using lb force, as it's a direct relation between pressure, and easier scale to measure I wish they would use lb force instead of Tesla or guass Lb force is much more universal and easier to understand, and while both can be formulated to find the conversions, lb force is just much more easier to understand view mentally in the 🧠 brain Or do all three for comparison!! Cool video, please do more videos

[@TheChemicalWorkshop]

if we talking PEAK power, you can probably use a capacitor bank and pulse it... ask photonicinduction...

[@rogerrabbit7469]

Even though those lab supplies are rated for 300watts be careful...max power I heard a small explosion in mine...it was fairly cheap so I opened it up to salvage what I could and saw that one of the CAPACITORs had exploded inside leaving strange hair like fibers on everything inside...but how do you bridge the electromagnet??

[@vincentrobinette1507]

connecting a diode anti-parallel to the electromagnet will absorb that flyback surge, (back-EMF) which protects the inside coils from possible flash over, and protects you from a potentially nasty shock! Watch for core saturation, if over-clocking. You will reach a point, where the core reaches its absolute maximum strength, and will not become stronger by continuing to increase current.