Magnets and Microwaves

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   |  last reply


Electro Magnets

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   |  last reply


Magnetic spec

I was wondering how big a cylinderical grade N42 NIB magnet i would need to pull a copper weight of 20 grams from 3inches? I dont know how to calculate so... If you could, that'd be great

Topic by lifelong-newbie   |  last reply


magnet motor or not ?

Is an angle grinder motor a permanent magnet motor or not ?,

Question by nicobotha12345   |  last reply


Neodymium Magnets? Answered

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   |  last reply


Focusing Magnetism? Answered

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   |  last reply


Feel a magnetic force?

I was just wondering is it possible to fell a magnetic force on your skin and if so how?

Question by Dominator57   |  last reply


Does a magnet get attracted... Answered

Does a magnet get attracted to another magnet outside of the glass of acid while the first magnet is inside the acid?

Question by Mr.Science Projects   |  last reply


Earth Magnets vs Electromagnets?? Answered

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   |  last reply


need equation to repulsing magnets

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   |  last reply


I want to make a big magnet to pick up nails?

I need to pick up nails in my field and I want to use my side by side hanging about 12 inches off the ground is there a way I can make a magnet that strong to pick up nails and screws that far away

Question by cjhynum   |  last reply


Is it possible to make a small skale model of the moon orbiting the Earth using magnets? Answered

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   |  last reply


Magnetic field redirection? Answered

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   |  last reply


How to measure electromagnet by Tesla?

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   |  last reply


what is the specification of a magnet?

What should I ask in a shop to buy a magnet(not electromagnet )?

Question by piku2323   |  last reply


Will a magnet work in space? Answered

Will a magnet work in space, if so, will its strength be affected making it seem stronger or weaker?

Question by Kaptain Kool   |  last reply


Questions about Magnets

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   |  last reply


Convert magnetic to electrical? Answered

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   |  last reply


Linear Magnetic Field

I am stuck in my research,please tell me a way to make a linear electromagnetic field,other than making an outer core for it please help me

Topic by ajose4   |  last reply


HMC5883L with external magnet

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   |  last reply


Magnetic Levitation Tram? Answered

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   |  last reply


Magnetic accelerator coil Answered

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   |  last reply


Is it possible to make the magnets lose it magnetic field permanently? Answered

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   |  last reply


Shocks w/ electro magnetics

Hello Every one this is my first post, and since I am a full time student, full time para legal and full time parent, I'm just going to throw this idea out there and let others build on it. Its just an idea that I have had for years. Concerning electro magnets and shock absorber for your average car. Let me know your thoughts. My main thought is that the magnets would be working with reverse polarity add in electricity and you have a pretty good repelling force for going over those bad Jersey roads. Let me know your thoughts.

Topic by arkburn   |  last reply


Magnets in the Microwave, can you do it?

So does anyone know if you can put a magnet in the microwave? Will it cause some nuclear explosion, or rocket me back into time? Or will it just stay on my mug and witness the warming of my beverage?

Topic by Punkergal   |  last reply


For the shake-it-like a tick tac project, will a 3/16" magnet work instead of a 1/8" magnet?

I am having a load of trouble trying to find a 1/8 magnet and im on a dead-line

Question by Capsfan09   |  last reply


How to make a magnetically powered/propelled vehicle ?

I'm a freshman in high school doing a Year End Project (YEP) for STEM. My project is a vehicle that is propelled by electromagnetism. I have three main idea's already. Option 1: Completely replace wheels with large magnets with either a North or South charge. Then replace normal roads with railings charged with magnetism of the same polar to the cars. The bumpers could be magnetically charged as well. With all car bumpers being the same polar, it would decrease the chances of accidents. Take into account that this idea has only started growing for the past 2 years so my ideas for the mechanics are not close to completion so I'm leaving those thoughts out. Option 2: keep the wheels but modify them to have 2-3 smaller magnets on the inside of the wheel. By turning and switching on different a polar changing direction between forwards and backwards. Then add the same idea with the bumpers for the same reason. This cuts the cost exponentially. Option 3: Keep the wheels and everything else of a normal automobile except the engine. Replace it with on large magnet that's stationary and a smaller magnet that can rotate or switch between North and South polar's. Possibly instead of only one pair of magnets increase to an unknown number to allow for more speed, braking and acceleration power. Still keep with the bumper idea. I can't seem to find a reason other than cost to get rid of it. Of course the magnets would interfere with electronics. I haven't thought of a solution for that problem as of yet.

Question by 085070   |  last reply



What in the world is a Rare Earth Magnet? Answered

I have seen a number of instructables that use "rare earth magnets".  What makes them so special?

Question by Saturn V   |  last reply


A question about electro magnets and solenoids?

This question was longer but this is the third time I'm trying to post it internet problems XD SO i guess if you need more info I can provide more. Any way I was wondering if anyone had any tips for making stronger electro magnets and solenoids. I want to make some that can lift and move like 5 pounds, I have no idea if this is a lot or not so if it's unrealistic... woops. Any way for the magnet I've been using nails I could find around the house, C batteries and magnet wire I got from radio shack,  and the solenoid I use the same power and wires but I took apart some random free pen form a gym and use a random long screw that only had threads around the tip and sorta wiggled around inside the pen case. In both cases they only could hold up or move about 8 ounces. any ideas on making them stronger? or am I just being unrealistic?

Question by justomeguy   |  last reply


Is it ok to use magnets to hold button cell batteries together?

I am trying to put something together, but realized I'll probably need 3 button cell batteries.  Is it safe to hold them together with magnets?  Also, will the magnets harm an LED? Thanks

Question by pennsteve   |  last reply


Can you fill an entire room with a strong magnetic field using current technology? Answered

I had an idea, but it will only work if an entire room is filled with a magnetic field. I plan on doing this idea within 30 or so years, so you can take you time answering.

Question by The Mollusk   |  last reply


Grade 3 science project. How to build a magnetic powered toy car.

This project needs to run solely on magnets. It has to move forward and backwards, as well as turn left and right.Move a two different speeds ( fast and slow ). I know the magnets can be used to repel and attract but  i can't put the idea to paper let  alone help her build it .

Question by weirdmoss   |  last reply


Magnetic Levetation? A Magnet Levitating between two Bismuth plates?

I am trying to make a magnet levitate between two bismuth plates that i made (picture 3,4,5 and 6). As you can see they are round discs about 7mm (millimeters) thick and 110 mm or 11cm (centimeters) in diameter. I bought two magnets; -the one I am trying to make levitate is 30mm (millimeters) in diameter, 10mm thick, and 22kg (kilograms) strong... -the other that is on top, the one that is pulling the magnet up is 30mm in diameter, 15mm thick and 23kg strong I put my two plates of bismuth so that there is about 25mm of space between them... Than I put in the 30mm x 10mm magnet that I want to levitate inside. The other magnet is located above the setup. I very slowly, ever so carefully start to lower the magnet. The magnet between the two bismuth plates starts to shake and at one point hits the top bismuth plate. I can't make it to levitate, either it is on the bottom plate or on the top. I tried to make the space between two bismuth plates smaller and larger, to lower the magnet by a very small amount...it didn't help... PROBLEM: I can't make it levitate, either it is on the bottom bismuth plate or on the top... WHY IS THIS? HOW CAN I FIX IT AND MAKE IT LEVITATE? Thank you for your help! -Stanislav A.K.A. Comodore

Question by comodore   |  last reply


Windmill vehicle? connecting magnets to a wheel and recharging the battery while using? What problems might I run into? Answered

I'm starting a project. and wanted to know the best way to tackle it. The wheel is the size of a cd not including the tire. I wanted the four wheels to generate power to make the battery's last longer. Any ideas would be helpful.

Question by SYMMETRY   |  last reply


I have a science project. my partner and i want to make a mini stove out of magnets. how do we get it hot without fire?

I have a science project. my partner and i want to make a mini stove out of magnets. We have a bunch of magnets and we put electrical tape on them. how do we get it to heat up without using fire?  Can we use a battary and wire to heat it up? We want to heat food. Is there any Safty tips. Would we be able to eat the food we make?  The magnets taped together a 3 by 2 inches, and is about a cm thick. plz help soon!!!

Question by Skulls0721   |  last reply


Distance sensor for Arduino?

I want to make a sort of self-educating machine as a programming project: there is an electromagnet and a magnetic thing and if the distance between  the magnets has increased between two measurements the Arduino lowers the current through the magnet, and if had fallen (the distance, not the object) it ircreases... In some time it should be able to reduce the aplitude of the object's oscillations. Is there a good and easy way to make a non-contact distance sensor? AND Is it possible at all????

Question by gruffalo child   |  last reply


how do you disassemble a motor?

A large motor from a printer wont work and i want to open it up to get the magnets, but i cant get it open.

Question by coleyy   |  last reply


Prewound Electromagnets

I want to make a wind turbine but I suck at coil winding. Where can I get prewound coils?

Topic by gimmelotsarobots   |  last reply


How do I build a faraday /kinetic battery with 2 coil wraps in series for added voltage?

I have seen a few projects on building a faraday battery for powering projects, but there is nothing on how to build one from scratch. There is no info how to determine output, choose the proper magnet, etc. I have also heard that you can build one with multiple coil sectors in series for a higher max output.

Question by    |  last reply



Layers V.S. Length; Electromagnets ? Answered

Ok, so I am going to be working on a project that involves electromagnets and the on thing I have never gotten straight is this: To make the most effective magnetic field possible do I make the (hypothetically) 100' of wire a long coil with only a couple of layers or 100' of wire a short coil with many layers? I have always come across conflicting views on if length improve the fields or weaken them. Any insight would be helpful and if you could also provide a good reference site for these types of questions that would also be appreciated. 

Question by Jayccob   |  last reply


Electromagnet using permanent magnets

Hi All, I'm attempting to make a very small strong electromagnet using permanent rare earth magnets. I want to boost the magnetic field and increase the magnetic force. The magnets are 10mm in length by 5mm in radius. I have 0.4mm2 enamelled solenoid wire for the winding. My questions are, Is it possible to increase the force of a permenent  magnet? Will the induced flux into the magnet compile the force or will the EMF have to be greater to see an effect? Will paralleling two windings make the EMF stronger? As the magnets are small I have limited room to wrap windings so is there a more effective method? Any help would be great!

Topic by JimmyM5   |  last reply


How to make magnetic ink?

Question by Dustc53   |  last reply


Easiest method for magnetic levitation? Answered

I have a ring magnet of about 4 cm diameter and additional magnet pieces. for my science project, i want to suspend one magnet in the air WITH OUT ANY SUPPORT. how can i do it? what are the factors affecting the stability? can anyone tell me the simplest way to perform that? what other shapes of magnet will i need to do that?

Question by allsparkunleashed   |  last reply


Earth magnets vs Electromagnets ? Answered

If I have an earth magnet in my pocket but I want a more powerful magnet would an electromagnet be more stronger?? Thanks. AL.

Question by alsports2000   |  last reply


Drilling rare earth magnets? Answered

Is it safe to drill holes in rare earth magnets? Is the dust toxic or anything like that? I have an idea for a project but it would require drilling holes in old hard drive magnets, but if it is going to make me ill or kill me I'll find another way to do it.

Question by RadBear   |  last reply


Long range magnetic field?

Hi,right now i am stuck with my research.I want to make a long range magnetic field 14 m (approx) please help me 

Question by ajose4 


Is this the best NdFeB magnet deal?

 I'm doing a little informal research to find the best deal in neodymium magnets. The price per cubic inch seems to be extremely variable- some on the order of $10 and others in the hundreds of dollars. Can you find a better deal than I did? Conditions on the order of NdFeB magnets: * Total price, including shipping to the US,  under $30 * Contains at least four magnets with intact coating * Contains a total of at least 6 cubic inches (98322mm^3) of magnet  The best I could come up with is $4.93 per cubic inch. Can you find a better unit price?

Question by NobodyInParticular   |  last reply


Super Magnetic Senses, Achievable?

If I combined Prank's tutorial on magnetic senses with an electromagnetic coil, could a more acute sense be achieved? Also, how would one go about making it look less conspicuous than a battery and a nail duct taped to your hand? And, would one be able to sense a Ferro fluid with this sensory upgrade, or no? Thanks in advance for the answers, and I apologize if my magnetic ineptitude put a damper on your day.

Question by geckits