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Magnets are one of the most fun things to experiment with. With a few materials you can easily make your own electromagnet.

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Step 1: Materials

List of materials:

  • Insulated Copper wire - thin insulation is best, I used crocodile clips and enamelled wired, which is also called magnet wire
  • A Battery
  • An Iron Nail - as used in my 'How To Copper Coat An Iron Nail' video see that here.

(Optional Materials)

  • Iron filings
  • Paper clips
<p>where can i buy the magnet wire?</p>
<p>I work at a school where cell phones are not aloud, however students sneak them past the metal detectors and safety team regularly. Is it possible to create an electromagnet that safety could wave in front on students' pockets/shoes/bra/wherever they are hiding cell phones and iPods, that would be strong enough to ruin them? Since it is against school policy to have them and signs are everywhere saying that they are not allowed to bring them in the superintendent is not concerned about any liability issues for damages goes. If this is possible, how large do you believe I must make this electromagnet. It must be able to be moved up/down students bodies outside their clothes and be strong enough to penetrate through cloths and whatnot. I have enough room by the front doors to create it so large they would have to walk through it like the metal detector, but the smaller wand like one would be preferable. I'm assuming that folks with pacemakers should steer clear of a device like this as well correct...?</p><p>Any input would be awesome, and help out my district tremendously!!!! Thanks!</p>
Whoops it did it multiple times
I already know how to do that I did it in science class
I already know how to do that I did it in science class
I already know how to do that I did it in science class
I already know how to do that I did it in science class
I already know how to do that I did it in science class
I already know how to do that I did it in science class
<p>Is there a reason why they always use copper for coils? I mean is there somthing special about it or is Aluminum just as good?</p>
<p>Because conductivity (it is how much electricity the material allow to pass), altough aluminium is not-so-bad electricity conductor, copper is cheaper and better conductor.</p>
<p>Wouldn't this short circuit and make the battery really hot or even explode?</p>
<p>i have constraints to create electromagnet...as in image.....what are the factors need to design it</p>
<p>is there any risks during making this</p>
I love this! I wonder if putting a regular magnet inside the center, instead of the iron would make it better, worse or no noticeable difference? <br>Maybe a Neodymium magnet? Those have a very strong pull but very short range. <br>I can recall trying to make one of these as a kid and attaching a battery to a horseshoe magnet. Of course, it just got hot and killed the battery. :-) <br>Anyway, thank you for posting! <br>
the whole point of an electromagnet is that you can turn it off. it would be much more efficient to increase one or more aspects of your electromagnet (size of the core, number of turns, or current). keep in mind that there is a limit where more current will add no noticeable increase. in that case, your only option is to increase the size of the core before increasing the other two. <br> <br>but to answer your question, no, it would not make it noticeably stronger to add an electromagnetic element to a regular magnet. the electrons inside the regular magnet are already aligned, so attempting to align them with the electromagnetic field from a wire coil will do nothing. also, manufactured magnets don't have a regular north/south polarization, and would actually be demagnetized if you were to put a strong magnetic field near it.
Not all of that is true. You wouldn't be able to demagnetize it by running current through it. Usually you have to heat it up to denagnetize it.
<p>i don't know what you mean, but if you're talking about my comment on manufactured magnets, i didn't say anything about running current through one. </p>
All I am saying is that you can't really demagnetize a magnet using an electromagnetic.
<p>you should read more carefully. i was talking about a manufactured magnet (the flexible kind). they can be demagnetized very easily. this was really just something i found interesting; not relevant to the discussion, since i doubt anyone would use one of those weak magnets on anything other than a fridge.</p><p>also, other types of magnets can be demagnetized; just not as easily. the wikipedia page talks about it.</p><p><a href="http://en.wikipedia.org/wiki/Magnet" rel="nofollow">http://en.wikipedia.org/wiki/Magnet</a></p>
You should read more carefully. The original question was about neodymium magnets.
Well, that makes perfect sense, thanks. <br>For turning it off, I suppose my hope was that something like this would work and it could go from strong, but I could pull the item off the magnet by hand, to very strong and hopefully more useful, such as an increase in strength or range. <br> <br>
I would suggest a trip to a hobby shop that carried toy trains, even the small cheap sets Run off of the AC in the wall plug, this runs into an AC to DC converter, goes through a resistance rotary switch, which controls the speed of the train by regulating the DC voltage, theoretically this would allow you to vary the strength of the electro magnet. <br> <br>I have been toying with this idea lately, I do alot of metal work, and it would be nice to have something like this in the shop, you can make a right angle magnet to hold metal for making tack welds, mount it on a stick and clean up shavings. I have an old train set from when I was a kid, I will have to test it out.
Or, you can use a potentiometer or rheostat to vary the voltage. Remember the handheld trigger from a race car track? Rheostat. <br><br>Also, to clarify and expand on my previous reply:<br>If you added coils to a regular magnet, it wouldn't increase the power of the magnet, but the field from the coils would be added to the field from the magnet. But keep in mind that the coils alone (ie, without a core) will produce a very weak field. The idea of modulating the strength of an electromagnet with a variable resistor is a much better idea and very easy to pull off. Radio shack sells rotary potentiometers.
That's something I've never tried. I've got some neodymium magnets that I'm going to use in future projects, maybe I'll look into it. I'm glad you liked this and thanks for leaving a comment.
43386362i know this might be a stupied question but sench i don't know could you plesase help me i want to make permarent magentic's in differnt shapes and sizes . first can you make a permarent magnetic using a induction coil by turning the field on and off very fast many time's . if not please tell me how to do it. any information could give me that would help
If you run enough current through it long enough, the poles will be set permanently. To do this, connect a phone charger to the coil around the iron nail by cutting off the end of the charger and connecting the wires to the coil ends. Plug it in, 30 second should do but it depends on your current. Be safe and use a charger with a transformer. I'm not responsible for you hurting yourself.
<p>did anyone else have an issue with overheating the battery? I made this yesterday with 24ga lacquer coated wire and the battery got very hot and distorted.</p>
Use a resistor or a light bulb or something to give the circuit resistance so it doesn't short out. A speaker or bulb will do just fine.
<p>works great thanks</p>
<p>:D really helpful thanks :)</p>
<p>This set fire to my house -_-</p>
<p>then you obviously messed up somewheres </p>
I just was looking for this. I am bust to make a stick catching game. I need eight magnets in a row at a strip of plywood each magnet hold a stick. By of the power of a magnet the stickwill fall down and the person who play the game has to catch the stick. <br> ===o=====o=====o=====o=====o=====o====o=== <br> I I I I I I I <br> <br>The O is the magnet and the I are the sticks. If the magnet is on the stick dnt fall. If I off the electric of a magmet the stick fall and the person under the sticks have to catch the stick. <br>Hope you can understand.
Make one strong enough to pick up a dumbell lol.
~( :-))={
Thanks for posting
There will be plenty more in the future. Thanks for dropping by.
-.-

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