If an electro magnet is suspending something in an vacuum environment, will it act as a medium? (Will sound waves be able to pass through the magnetic field?) Thanks
Topic by Weissensteinburg 11 years ago | last reply 11 years ago
I'm planning on setting up a kind of utility rack in the kitchen, and the top of the microwave is the most convenient location. I was planning on using neo magnets to hold it all in place, but does anyone have any idea if they'll affect the magnetron?
Topic by yontally 10 years ago | last reply 10 years ago
Ok, i'll be frank. i need to find out how to build an electro magnet with and effective ranger of about twenty or so feet i find it very interesting. and have always wanted to snatch up a small object/scramble a crowd of cellphones. former more than the latter. any help would be very appreciated. THANKS
Topic by blingity 11 years ago | last reply 11 years ago
Couldn't, with well position magnets, create an orbit around a central magnet? Almost like perpetual motion? I've been playing around with magnets lately, and I've gotten magnets to do 2 full revolutions around other magnets before coliding. Is it possible?
Topic by guyfrom7up 11 years ago | last reply 8 years ago
I have a motor out of an waxer/buffer and I was wondering what improvements neodymium magnets would be. I have a couple plans for this motor, the first being for a temporary ball mill, and the second for a generator. I am pretty sure the neodymium would be good for a generator, but what about a motor. I am also wondering what magnets to get. Should the north pole be the outside, south pole be the outside, should it be magnetized thru circumference, magnetized through thickness, or south on one side and north on the other.
Question by jj.inc 6 years ago | last reply 6 years ago
Hi y'all! I am wondering if it is possible to focus magnetism? Like if you have a powerful electromagnet with a less powerful electromagnet wrapped around it. Then if both are turned on, the small one will focus the larger one creating a straight electromagnetic field and making like a "electromagnetic laser". Thanks, joespicnictables
Question by joespicnictables 7 years ago | last reply 7 years ago
http://youtu.be/zqG-TL0WnjE How does this device work? Has it ever been on instructables or anything like it? How would I go about mounting the magnets on the rotor? What sort of spring would I need for the magnet mounted to the vertical shaft that slides up and down? In short I want to know every little detail about building it before I begin so I don't go buying a lot of unecessary stuff and waste money.
Topic by merlin280 6 years ago | last reply 5 years ago
Cutting open transformers (you might call it an adapter, or charger) yields a good quantity of re-usable magnet wire. Motors don't seem to be a very good source, since the windings on those seem to be saturated in varnish to glue em together. Apparently, vibration is more of an issue in the motors, so they make the windings solid. This might be different in little hobby motors. Dunno.
Topic by Toga_Dan 4 years ago
Dear Instructables, I need to design magnetic coils for a mattress that would emit a uniform magnetic field. Does anyone know of a basic program that would plot flux density over the coils? Preferably free! Thanks! Mike
Topic by Cburg1 6 years ago | last reply 6 years ago
Hi, I've never seen a community so welcoming and intuitive than the instructables community, so I decided this website is the best place to ask my question. I'm sure there is someone hidden deep within the fathoms of instructables that is versed in the matter of magnetic field redirection. I'm working on a project that I will post an 'ible of, (truly wireless speakers ;)) but I need some method of redirecting a magnetic field so it doesn't interfere with the speakers. I have heard of some methods, i.e. Mu metals, MagnetShield, but these are not easy to come by, especially in the UK. I have considered ordering from the manufacturer, but I am not willing to pay the exorbitant shipping costs. I would firstly like to know if such a material exists, or if alternative/better/cheaper methods are available, secondly, whether or not it can be procured in the UK, and if so, where, and thirdly, proper application of such a material. I have done lots of research into the matter, but have been left fruitless. I'm sure someone can help. Merry Christmas, icyseptember
Question by icyseptember 8 years ago | last reply 8 years ago
So, we've seen magnetic gloves..but we don't always want the magnets. So, instead of taking off the glove, why not make an electro magnetic glove? Do you guys like the idea? Should I pursue it? Make an instructable on it?
Topic by Weissensteinburg 11 years ago | last reply 3 years ago
Can an electro magnet have more gauss than a neodymium of the same size? I was just thinking about robots and advanced prosthetics. One issue with them is they require rather bulky motors to get the lifting and holding capacity we often require. So if power wasn't an issue and you could make a small elecro magnet that has more gauss/a stronger magnetic field than a neodymium magnet. Than we could make strong and smaller motors. Just a thought. Discuss!
Topic by mpilchfamily 4 years ago | last reply 4 years ago
I am trying to find a practical way to build a device to convert magnetic energy into electrical energy, some kind of generator or other device, there are several ways in which this might work in theory but actually building the device would be more difficult to figure out.
Question by thedriftcore 7 years ago | last reply 2 years ago
The votes are in! Congratulations to the winners of the Magnet Challenge!Magnet Challenge winnersShake it like a Tic-Tac! by MrMunkiMagnetic Stirrer by g0pherMagnetic Fingertip Gloves by vatosupremeMagno-Sniffer (Magnetic Sniffer Probe Whistler Thing Using A Hall Effect Sensor) by pronteonVersatile and Low Cost Digital Counter by trebuchet03MAGNETIC SCALES by puffin_juiceOK, I said there would be only five winners, but there was a tie and I hadn't specified how I would break ties, so I'll just get another ATC 1000 Helmet cam!Also, I found another Digital Spy Camera under my desk, so I'm making a special category to win this prize: To the user with the most judges' votes among all his magnet projects. This goes to FrenchCrawler for The "Improved" Ferrous Gatherer :), Coversational Magnet "Toy", "Mine" your own ferromagnetic metal (slivers)..., and Portable, Pocket Sized ROMP. While closely related, I can't quite make a case for them all being part of a single, multi-part Instructable. The entries to the Magnet Challenge were so good that we're going to send Instructables patches to everyone who entered! Thanks to everyone to who entered and to the people who helped judge the challenge: arwen, canida, fungus amungus, intoon, lebowski, and rachel.Original Magnet Challenge instructions here, Magnet Challenge Group, information about the SpyCam here, and an Instructable using the ATC Helmet Cam here.
Topic by ewilhelm 12 years ago | last reply 12 years ago
Ever since i observed the attractive/repelling invisible force of the magnet i was interested in this mysterious action at a distance what compels the movement of metal the laws, the principles, wow electromagnetism cool stuff
Topic by eoosen 12 years ago | last reply 10 years ago
I learned a couple of years ago about a motor developed by Nikolai Tesla that operates using neodymium magnets. If anyone has any information about this or other similar motors, please post information and help to save the earth from the evils of oil!
Topic by HazzardFan75 11 years ago | last reply 2 years ago
Http://www.nylonmag.com/?section=article&parid;=410 Lancome used to make a nail polish with a magnet on the bottle. You'd paint your nails and then put them near the magnet, which would create a starburst pattern by attracting and repelling charged pigments. Is it just me or could this be done with a pinch of iron oxide powder in any nail polish?
Topic by lotusduck 9 years ago | last reply 9 years ago
GY-273 HMC5883L Compass A. I'm waiting for my chip to arrive and will attach it to a RasPi. B. My question is: if I align my chip to "N" then rotate a magnet round the chip - i.e. a weathervane - thoughts on how that might work? C. Can my magnet, if too strong/close, damage my chip? Thanks
Topic by liderbug 3 years ago | last reply 3 years ago
I know I'm probably going to sound like an idiot for asking, but can magnet wire release any toxic fumes when heated? I made a speaker using a magnet-wire coil and a neo-magnet, and when I plug it into the amp, I realized the coil gets very hot. I was expecting this, for I've used a number of coils in other projects. There is an odor, no doubt, that comes from every coil I've used when making an electromagnet. Sure, the smell may come from the iron nail being heated, but I always associate the smell with the coil. I'm not willing to smell this speaker, however. So, is there any risks that come from the heating of magnet wire? The coil gets hot after about a minute of run-time, but I'd like to be able to run through an entire album of music (an hour?) if possible. Thanks!
Topic by freethetech 7 years ago | last reply 7 years ago
Hey guys!I just bought myself a Ikea PS laptop workstation. I thought it was heavy enough to stand on its own, turns out it isn't. I don't want to drill holes on the wall, I thought about using magnets to give balance to it.Questions are:- can I do that? I mean, magnets to hold a metal structure plus using that to hold electronics such as laptop, DS, camera, mobile etc.- in case I can, which sort of magnets should I buy? The open lid on the Ikea PS supports up to 25kg/55lb, plus 15kg/32lb from the PS itself. There will be support underneath to hold the weight (thought about using glass jars, grouping three on each side, totaling six), so the magnets will mostly add balance to the structure, and not hold its entire weight.Thanks a bunch for taking the time to read this! A good day to all.Cheers,Diogo Slov
Topic by slov 10 years ago | last reply 10 years ago
I was playing around with some of my 1/8in. NeFeBr (or is it NeBrFe?) magnets leftover from the challenge. Was using them to find screws on my flip phone. I noticed that when I put it at the "joint" of the two halves, the screen went dark. Turns out it thought I shut my phone. This was just a little odd tidbit that I wanted to share, that has potental. But, it isn't an instructable, so I just posted it.
Topic by zachninme 12 years ago | last reply 12 years ago
Hi, 1st post hope you can help! I'm trying to find a way of getting analog data (from an exercise bike) and store it onto a computer in a text file so I can manipulate it and work out averages etc. I thought of having a magnetic switch on the pedal so that everytime the pedal rotates I can store the time thus giving me the speed. Does anyone know if such a cable already exists or if not how to go about creating one? Also if anyone has a better way of getting the data I'd love to hear from you. Many thanks Adam
Topic by adamt_069 10 years ago | last reply 10 years ago
Hello there instuctables, I need your help with a project i am attempting, i am in the process of making a maglev tram and i have a couple questions i need help with? 1. I have a simple circuit for a linear motor that i understand to the most part but i need help with finding an electromagnet to use / make, it needs to run on batteries and obviously the main concern here is weight and stability so the smaller the better but still needs to be strong enough to propel the tram along the track so i suppose my real question is what ammount of winding, resistance and core material would be suitable for whatever voltage i could provide! 2. Next i suppose what way round should i place the magnets, should i place many electromagnets on the rail with sensorsand permanent magnets on the tram, or should i have a powered electromagnet on the tram and permanent magnets on the track? 3. Also what hall sensor should i use to detect the magnetic fields, unipolar switches or ratiometric sensors? 4. And finally control, how would i control the motion of the tram i.e. speed and direction? Id like to thank you all in advance for any help you could provide and i hope my description is accurate enough!! many regards, Scott Photo of simple linear motor circuit (img.1) When the hall sensor (switch) senses a pole of a magnet, it activates the transistor, in turn magnetising the relay and causing the current in the electromagnet (motor) to run one direction, then as the opposite pole is detected the relay de-magnetises and reverses the current thus reversing the pole on the electromagnet! This is designed so that with permanent magnets on the track in an alternating fashion of poles (nsnsns) the tram is either pushed or pulled along the track!
Question by Xmortx114145 6 years ago | last reply 6 years ago
I was told that I should make a forum topic out of this. So here it is:Here is a link to my upublished instructable:Magnetically Propelled BicycleI came up with this two weeks ago while I was day dreaming about levitation and magnets.The idea is that one stationary magnet set up on the middle of a bicycle negative facing front, can push two magnets bolted together, each facing negative, with an axle running through them and wheels on opposite sides. So when the stationary magnet'ss power is increased, the two magnets in front will be pushed, thus rotating the axle where the wheels are attached, adn obviously the wheels are turned.I say "when the power is increased" because hopefully an electro magnet can be used. I am not sure, but I think an electromagnet can be hooked up to a car battery, and then with some control device, more electricity can be sent to the magnet, possibly increasing the power ( I don't know much about this stuff so help me out here.Look at the schematics for all of the anatomy.I have not figured the turning system out completely, in the intro picture you may see that the turning wheel is connected to the rear by a bar ( In the way I believe it may work there will be two bars side by side, I can't really explain it yet). That is how I plan the turning to the controlled.If you have any ideas for this project, add a comment. I have not made this yet and am still creating it.Please, do not steal my idea, I am only 14 and just started inventing. I have no idea how the patenting system works and I do not have the money for it.I would also like to know more about electromagnets, how they work and where to buy them. I saw one site where the best electromagnet can "pull" like 1300 pounds, so this thing should go pretty fast if it is built properly. I reallly want to know if it is possible for electromagnets to push, that is the whole Idea for this. But if they can't, I've already drawn a simple schematic for pulling the wheels which is on the next page.I also want to add that the stationary magnet cannot be level with the rotating magnets, it will have to be a little above, and if you add a mechanism where the stationary magnet can move up and down, you can control the bike forwards and backwards.Hopefully, no one has a patent on this ( I've searched and haven't found one). And hopefully this will replace fossil fuel vehicles, although I doubt the government will allow that. THE WHEELS/ROTATING MAGNET IS NOT ATTACHED TO THE BICYCLE. IT IS ONLY CONNECTED BY AN AXLE RUNNING THROUGH IT. JUST LIKE A BICYCLE OR A CAR. Here is a link to what I was sorta thinking:Here Just turn it horizontally and add wheels to the ends. The gyro- thingy is like the rotating magnet and the base is like the stationary magnet.
Topic by Alphaviking 12 years ago | last reply 11 years ago
Hi! I am setting up a levitation system and need to estimate the amount of voltage and current that is needed for a 2" dia. coil to produce 4800 Gauss. I don't have any restrictions/requirements on the core, number of turns, etc as long as it would produce 4800 Gauss with a 2" diameter. How can this be calculated? (I have spent a lot of time googling for such information, but I am pretty confused and didn't find how to calculate this) Thanks!
Topic by J50Nunlimited 9 years ago | last reply 9 years ago
Im going to try to keep this short. So a friend and I are both sophomores at our highschool and we are both in chemistry (which is a higher level science) and i built a coilgun for last years project and attempted to build a PWM driven one this year. My friend and I want to build a rather large coilgun using either 10 microwave oven caps or close to 40 or 50 caps from computer power supplies. What i need help on is whether we should use the microwave caps which are high voltage but low capacitance or the power supply caps which are 200 volts and around 500 micro farads. I also need help on what wire to use for my coil and how many turns for the coil. i would like help with a coil for each cap size. We are planning on using either a 3millimeter by 5 centimeter long steel rod or a quarter inch bolt. our goal is to at least shoot it through the wall of the physics classroom and maybe through the door of a car. anything helps. Thank you
Question by budhaztm 7 years ago | last reply 7 years ago
Original Question (Hi does anyone know of a material that will block the magnet field from a permenant magnet without the material being to thick.) Thanks for your replies, to go into more detail, the material must not be attracted to the magnet as would mild steel The magnet force/pull is about 1LB and I need a material less than 5mm thick that will reduce its pull by at least 10 percent but the higher the better. Also it must not cost a fortune, (How much does Mumetal cost and is it attracted to a magnetic force), I have searched high and low and I am now begining to think that my search is futile and maybe no such material has yet been discovered. Your my last hope people. Thank you.
Question by needtoknowmore 7 years ago | last reply 7 years ago
I have an earth magnet/ neodymium magnet that is pretty strong as far as pulling power is concerned but would an electro magnet have more pulling force or power. Its a small enough earth magnet that fits in my pocket. Thanks. AL.
Question by alsports2000 7 years ago | last reply 3 years ago
I would like to know the equation for the repulsing of magnets I have a science project due and can't find the equation the internet kind of goes around the bush. If you can answer this as soon as possible please I really hate to turn it in late. So if you have ANY helping ideas search tittle above -caleb griffin-mose
Question by awe80me_k1ng 3 years ago | last reply 3 years ago
Can magnet attract over longer distances like 1 meter if yes then how much powerful means in width , length , type of magnet do i need to attract 2kg of iron ball over a distance of 1 meter ?
Question by MuhammadK19 2 years ago | last reply 2 years ago
After learning about cintripital force and the earth's gravity keeping the moon in orbit of the earth. I was wondering if it was possible to make a smaller skale thing that prove the concept using magets(magnetic force representing gravity)
Question by varneyrobert 8 years ago | last reply 8 years ago
I will be doing an experiment how powerful the magnetic field of an electromagnet, and my guess is the more you twist the wire the more power it generate. But i don't know how to measure the magnetic field by using the unit Tesla.
Question by defineSCIENCE 3 years ago | last reply 3 months ago
During a recent stay I showed my granddaughter (8) how to display magnetic lines of force with iron filings. She asked me a question I couldn't really answer so I will ask the combined wisdom (mainly because I can't find an answer on the internet in general) Her question: The iron filings line up along the lines of magnetic force - Why are there gaps between the lines? My answer: My initial response is that the iron filings become magnetic and so repel each other so they form up in the lines we see because they are quite big but the magnetic lines of force are either much closer together or one continuous "beam" Any insight?
Question by rickharris 5 years ago | last reply 5 years ago
I know magnets can lose its magnetic properties if exposed to heat, but is there a way to make the magnets permanently lose its magnetic fields?
Question by Plasmana 10 years ago | last reply 4 years ago