I want a powerfull electromagnet?

Dear friends, For my thesis, I need a strong electromagnet. How can I made it? It must be as strong as possible. Thank you so much. Best Regards. Reza

Asked by mbc711 9 years ago


How to power an electromagnet? Answered

Is it better run an electromagnet of a bigger voltage(12V) with a smaller current(150mA) or with a smaller voltage 5V and a bigger current? Which will heat it up less? Does it even matter? The electromagnet will have to work for several hours so heat is my main problem. Also should I use thicker or thiner wire? I'm trying to build a electromagnet for a ferrofluid project.

Asked by odvratno.zgodan 6 years ago


electromagnets to push objects without touching it

Hi, i want to make an electromagnetic coil which can push another metal plate without touching it from destance of approx. 50cm . max voltage allowed is 24 v.please suggest me way of getting electromagnet strong enough to push weight of approx 7kg without touching it.can you also suggest me material that can easily repel electromagnet?please help asap.

Asked by KiranS13 2 years ago


Help with making an electromagnet Answered

It’s not as simple as it sounds I need to make it pick up things ( screws maybe screwdriver)and I need to be able to hide it somehow under my sleeve so I can trick people in to thinking I have magical powers.

Asked by zack.008 8 years ago


Building an electromagnet. Help anyone?

Hi all. I'm looking to mess with ferro fluid but I'm wondering exactly what kind of magnet I'm going to want.  From what I've looked up anything under 3000 gauss and I might as well get a rare earth magnet.  So obviously we move to electromagnets.  Basically what I'm looking for is help to create an electro magnet with these three criteria maximum gauss, minimum effort, and moderate safety.  I'd rather not have it get hot and burn myself.?

Asked by djvbb12 8 years ago


I need to make an electromagnet that continues to turn on and off (on 20 seconds off 45 seconds)

Hello, I am trying to make an electromagnet that turns on and off on an interval. On for 20 seconds off for 45 second. It would continue to turn on and off until the power is turned off. Any and all suggestions as to how to make (or buy) this would be great! I am making this for an art piece.. I am a glass artist so I am not well versed in any of this electrical engineering Thanks! Maia

Posted by MaiaS5 3 months ago


HELP!! i am building an using the magnet on the back of a car speaker.

I am also going to try to channel the electromagnetic waves. where should i start? How much energy would i need? How can i contain the magnetic field? at what point does the energy become harmful to the human body?

Asked by tprusak 6 years ago


what will be the wire size ?if i would like to make a eletro magnet ?which length could be 1200 mm and core width 40mm?

Dear friends, I want to make a drum with magnetic bars, to capture max matal particals from amixture, size of magnet should be 1200mm*---- ,suggest me what would be the Diameter of wire Regards Nadeem

Asked by nadeem Ashraf 5 years ago


Optical Image Stabilization

Hi everyone, I have a little awkward question here but I am sure someone who knows a little bit more about electronics can give me good advice. I took apart the lens from a consumer video camera and took out the Optical Image Stabilization module in an effort to figure out how it works and possibly hijack the signal so I can control the movement. In the camera this module is getting the signal from the accelerometer so it knows how to engage the two electromagnets and counteract the movement (shaking). What I have done is take the leads that go into it and try to fake what gyro sends to this element. So far I have noticed that when I short 1 and 2 or 3 and 4 the element goes to one side or up. So I put a potentiometer on it (2K ohm) and it gives me some control by turning the dial, but not good enough. Has anyone any idea how can I achieve a gradual movement of this lens element vertically and sideways with a slider or dial of some sort? Your help would be greatly appreciated!

Posted by Sudija 10 years ago


What can i do with non working electromagnet ceiling fans?

I've got a lot electromagnetic ceiling fans that don't work any more of which i don't what's the difference, if anybody can teach me of how will convert it to anything instead of throewing it

Asked by jovenhatsjr 9 years ago


How can i make a (strong) electromagnetic wheel, so that when i give voltage it rotates? (in a bicycle)?

Plz refer me to some kind of web site that gives me this info.......

Asked by The Mak3rs 8 years ago



how to put into use some damage electromagnetic fan? Answered

I have a lot of ceiling fans that doesn't work anymore and i would like to convert it into something useful rather than giving it to recycle depots can anyone show what i can do about it.

Asked by jovenhatsjr 9 years ago


What is the relationship between the range of an electromagnet and its shape/size?

I'm thinking of building a floating globe sort of thing. How do I determine what size of electromagnet I should build? The globe itself would be fairly light, so the strength at range would not be much of an issue.

Asked by MaximY 1 year ago


How to power a strong Electromagnet?

I want to make a fairly strong electromagnet for general use but I also have a task in mind. I live in an apartment building near some students and someone egged my window. The egg dried in and now I can't reach it to clean it. I've see magnetic window cleaners before but they are cheap, weak and not up to task so I'd like to make an electromagnet to help with the scrubbing action. The windows are double glazed and the neodymium magnets I have are not strong enough. The only electromagnets I've ever made were the basic science experiment type, coiled copper around bolt with a battery to power. For this I assume I'll need a large battery or would it be mains powered? Any suggestions?

Asked by nodnodwinkwink 4 years ago


Wireless circuit diagram needed for an Electromagnet.

Hey guys, i urgently need to build a wireless circuit using a simple on/off electromagnetic circuit that would drop a metal object when the circuit is switched off. i have a 12V dc powered electromagnet as well as RF receiver and transmitter pair. the receiver needs to be fitted with the electromagnet and i would be using 4.5v dc power supply for the receiver using 3x1.5V button cells. Kindly help me with circuit diagrams and/or a list of other components such as generic IC/ timer 555/ resistors, capacitors, etc. which would be needed for me to build the circuit. Thanks a lot.

Asked by him1703 6 years ago


Electromagnet Trouble

I'm in the development stages for my entry into the Launch It contest. Right now I'm just experimenting (or trying to) with scale electromagnets. I'm using solid core insulated copper wire from RadioShack, and a nearly fresh 9v battery. I tightly wound the wire around a finishing nail, which happened to already be magnetic, but am not getting any improvement in the magnetic field. It seems to be the same, weak size. Am I doing something wrong, or do I just need to step the size up? Thanks!

Posted by Bran 10 years ago


Magnetic Field for hollow core?

I am working on a project in which I have to control a small setup at the end of a motor shaft using an electromagnet. The electromagnet needs to be around the shaft inbetween the setup and the motor. So I have used a metallic ferromagnetic spool(image attached) and wound 32 gauge wire on it to make it an electromagnet and put the shaft through it. Since this core made out of spool is hollow, I'm not sure how the magnetic field will behave. I tried powering up the one I made and it' seems to be both attracting and repelling a magnet's pole (edges attract while centre somewhat repels). Anyone got any idea about this?

Posted by Antzy Carmasaic 5 years ago


Strange Electromagnet Observation

Hey everyone. I'm fairly new to the hobby electronics world, and today I decided I'd build an electromagnet. I wound my coil around a steel bolt, and I used 3 Duracell AA (1.5V) batteries for a power supply. When I turned on the switch, I found that my beautifully wound coil took a little bit of prying to get it off of the metal base I was working on. I thought "Let's try 9 volts!" So I grabbed a Rayovac 9V battery that I had around and hooked that up in place of the 4.4V (measured) bank. The Rayovac measured to be ~9V. The electromagnet was noticeably weaker. When I tested my magnet with just one of my 1.5V batteries, it felt like it had similar strength to the 9V battery.  Can anyone explain what might be going on? Short of that, could someone tell me how to measure the current coming off of each power source?

Posted by TheMike25 5 years ago


Any suggestions on a good power source for an AC electromagnet?

I am building an AC electromagnet as a part of a science project. I'm unsure of what to use for a power source that will safe and function properly. The end result of the project should cause a metal ring to "jump" off of a pole and into the air.. To do this, I need to be able to charge the coil (it only needs to charge for a second, literally). So, if anyone knows of a source with some type of on/off switch or button, that would be great, but I am open to any and all suggestions!

Asked by Becky197181 6 years ago


Hi, I need to make a 2" x 2" strong electromagnet, enough to pull a 0.5 kg body placed about a meter away from it?

I want to know the core and the wire to be used?. And the minimum battery rating, I can use upto 12 v or 2 batteries of 12 v. Please help me.

Asked by usamasiraj 8 years ago


Can someone help me? My electromagnet wont work ):<

Hello! i'm kinda new to instructables, so plz don't get mad if i post something wrong... Anyway, my magnet is misbehaving. It just doesn't wanna move anything at all. That first image up there is my electromagnet :D (sry for the low resolution, my camera is more than capable of HD, I don't know why its blurry) How i have it powered is i'm running it off of a 5 volt AC charger. I know, I know. AC wont work for electromagnets. Well, that second picture that i got up there is a set of 4 diodes that makes the AC power turn to DC. I've got both ends of the DC power going to both ends of my magnets. Then I turn it on, and was disappointed to see that my magnet didn't like the way i made it and decided not to work. I've also got the wire insulated and an iron core, and am also trying to pick up iron nails, but to no success. not even a budge! Sry if i'm making this long... i'm just trying to give you all the information I can ;D (The current is also running through)

Asked by Dominolan 1 year ago


Would it be possible to generate at least 9V with a small ElectroMagnet Generator?Please help!?

Im thinking of powering a 9V computer Fan with a little motor I pulled out of a old RC car. How much voltage do you think would it be possible to pull from that motor if say the motor uses a 12V battery to run at full speed?What do I have to do to pull max potential out of the motor. Its a science project that im doing for myself and maybe later on will become a fixture in my home. Thanks!

Asked by Cartman007 8 years ago


creating movement- pulsed coil magnet? other ideas? and how to accomplish?

I'm wanting to swing a small pendulum around (randomly would be nice).  I'm figuring something like is inside this candle would be the best method: https://www.youtube.com/watch?v=XM1c9Ny3X8E However, I don't know where to buy or how to make this (I can make a wire coil, but not program a chip to turn power to it on and off).  The candles are too expensive to buy to take apart.  Does anywhere happen to sell just that piece?  It would be great if I could just buy it, hook it to my 3v power, and I'm all done. Or does anyone have other ideas? Thanks.

Posted by aliasjanedoe 3 years ago


Schematics to the Electromagnetic Floater?

Could anyone please send me the circuit schematics to the electromagnetic floater?(https://www.instructables.com/id/Electromagnetic-Floater/)

Asked by .Unknown. 8 years ago


Maglev Train using Electromagnets

I have made a simple maglev train, using Electromagnets. It uses repulsion. and everything is working....except Propulsion. How can I propel it? I can remake the project if required.

Posted by NHarmonia 5 years ago


Electromagnetic field generator

An electromagnetic field generator strong enough that can disturb the tv signal of your neighbour next door

Posted by SalemSnaKe 8 years ago


How long will a 9v battery hold electromagnet lock closed Answered

I want to make a hidden cabinet, locked by a 5w electromagnet, but only powered by a single 9v battery, my question is well it work and how long will it last.

Asked by krayzeesmoke 3 years ago


How do you make an electromagnetic crane?

I need to make it with the help of 2 motors of DC 9V each and batteries which can range from 3V - 9V which can move about its axis and pick up a small amount of weight. Need it fast!!!

Asked by Ananthu007 6 years ago


can you make two electromagnets attract?

Just wondering. because they are like permanent magnets when used right? and can you make them repel? cause that would be a cool point maglev system

Asked by bufalloo 9 years ago


Can I make a portable electromagnet that will support my body weight? Answered

I would like to make a couple of electromagnets that will support my body weight, I'm about 75kg, the idea is climbing along underneath bridges ;) Is it possible? What sort of batteries would I need? I hope you can get what I mean. Thanks Jamie

Asked by frazzlemydrive 9 years ago


Can pulse width modulation pins on arduino noticeably affect the strength of an electromagnet? Answered

I am currently designing a project in which two electromagnets cause a small metal object to levitate between them, and am trying to create an interactive interface in which gestures on a multi-touch trackpad cause the object to levitate higher or lower. My question is, is it possible to use an arduino's pulse width modulation to significantly alter the strength of an electromagnet in order to move an object at a noticeably varying distance from the electromagnet?

Asked by ALogan97 5 years ago


Electromagnets, I'm wanting to make a magnet powered by a 1000W computer psu? Answered

How can I make a electromagnet that is powered by the 12v line on a 1000W psu from a PC? It needs to be as small as possible, it also needs to be as strong as possible it needs to carry around 200gr of weight, and I'd like to have it on for arround 2-3 hours without any possible dangers. Please explain me as much as possible?!

Asked by trucker her 8 years ago


Can you use standard choke inductors as electromagnets?

I am making a project where I need very small electromagnets to attract and hold a small metal flap closed when the circuit is turned on. Flap is about 1cm from the magnet and returns to this position via a spring when the circuit is off. In theory is it possible to use inductors used in electronic circuits (for interference suppression etc.) as an electromagnet? Thanks.

Asked by laquermonkey 8 years ago


how far can an electromagnetic field reach?

For my project I need to know how far electromagnetic fields can reach. I am guessing its related to power and materials, but perhaps there is some kind of rough formula for calculating potential reach? By reach, I mean, how far can the magnetic field reach and attract (move) something, like metal fillings. Also, is there anyway to know how quickly a magnetic field can move something. In other words what speed will metal fillings move at when the electromagnet is switched on? Thanks all, Joel (the snow athlete)

Posted by snow athlete 8 years ago


Electronic catapult?

Okay. I'm going to make an electromagnet to hold the spring in place while it's compressed, and then as the power turns off, the spring will release and shoot the catapult. However, I'm not an engineer-- I'm making this for tech class. How should I design the catapult so that this will work as a triggering mechanism? In what way should I set up the spring and electromagnet relative to each other? Thanks in advance.

Posted by camiheall 3 years ago


Help with electromagnet

I have made an attempt to make an electromagnet.I got a 10 inch iron rod with insulated copper wire wrapped around (see image)I didnt have enough wire for the whole rod, so the wire is in two seperate sectionsI tried a AA 1.5v battery, two AA 1.5v, a 9v, two 9v and a big 6v plugged in both ways (negative, positive).None seem to work.I thought it may be the two sections connected together, so i tried all the above batteries again on only one section, and it still didnt work.Can anyone help me out here ?

Posted by oxidase 9 years ago


How do I properly power my electromagnet?

I just purchased an electromagnet from Amazon for a small prop for an upcoming play I am directing. Now my problem is... I do not have a clue as to how to supply the power to it. It needs to be able to run steady for roughly 3 hours.  What size batteries would I need -the smaller the better in terms of size since the prop itself is not that large,  ut will do whatever is necessary to function properly. Here is the only information the electromagnet had attached to it: 'Feature: Electric lifting magnet Powerful and compact Smooth and flat surface Low consumption and reliable Applications: assembly line, sorting machine, mechanical arm, experimental facility, etc Specification:Material: Metal Input Voltage: 12V DC Lifting Force :20N Overall Size : 15 x 15 mm /0.6 x 0.6 inch(Dia. *T) Thread DIA : 3mm Lead Length : 24cm/9. 5 inch" Any help would be greatly appreciated. Thank you in advanced!

Asked by DeanB77 1 year ago


Selectively magnetized (hemi)sphere

Hi everybody! I'm looking for a way to construct a hemisphere, - maybe 1.5" to 2" in diameter - ideally with no moving parts - where any of a number of areas on the surface could be magnetized at will I thought of having an array of tiny electromagnets starting from middle and radiating to under the surface, but frankly, that would take a long time, and I figure there would be insulation issues. Any suggestions?

Posted by drmab 3 years ago


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! 

Asked by Xmortx114145 5 years ago


Coil/Electromagnet

Is there any difference between a coil and electromagnet? So, is saying that a dynamic speaker has coil as correct as saying that it has an electromagnet?

Asked by .Unknown. 8 years ago


Electromagnetic pulse generator plans?

Does anybody know where I can find plans for an electromagnetic pulse generator?

Posted by abun1991 11 years ago


Gauss Rifle with electromagnets? any ideas on how to wire up a series of small e.m.s?

My thought is this; if you had a series of electro magnets lined up to make a gauss rifle who could you A) make electromagnets small/strong enough and B) either wire it or program it so that they turn off/on in a specific pattern. For those who don't know, what I'm looking to build will look roughly like this but using electromagnets instead

Asked by Jakyl 6 years ago


Electromegnetic Levatation Glove?

I've seen some devices which use electromagnets controlled by microchips (like this https://www.instructables.com/id/Electromagnetic-Floater/) to levitate small objects. I'm wondering if that same technology could be put into a sort of glove, allowing the user to levitate small metallic or magnetic objects, and maybe even pull or shoot* them? It would have a small electromagnet in each fingertip, as well as a larger one on the palm. All electromagnets could pull upwards on the object if the palm is facing down, and the object was below them. Only the fingertips would pull if it's facing up, and the object is above the palm, (but slightly below the level of the fingertips) The problem would be sensing where the object is, and adjusting the power of each magnet based on that position, and the the position of the electromagnets. *using actual magnetic repulsion would be tricky, but you could, say, have the object sit in the palm of the hand, with fingers outstretched,  then have it attracted to the electromagnets in the fingers, which turn off just as it passes by them. It retains its momentum and shoots out. So, if anyone want to confirm if this is feasible or not (or even want to make it), please post!

Posted by Vick Jr 8 years ago


Magnetic Levitation (without electromagnet above, or spinning top)? Answered

Hey, so I was watching some of these videos about magnetic levitation, and I notices that some levitating globes don't have an electromagnet above the globe. Nor is the globe spinning very fast. This is one of the devices that I have seen, and I would like to know how it works so that I can build it....and maybe make an instructable along the way. Also, SimerLab has the levitation down pretty well. Anyone have any ideas? Thanks! Sam P.S. Found another good website here that has one taken apart (it was a Levitron AG). And this website has a kinda breakdown on how one might work, but it definitly isn't specific enought o build one.

Asked by samr37l 6 years ago


50k RPM with DIY Motor?

Has anyone built an electric motor that can reach 30-50k RPM? Would you think it is possible to build one?

Posted by Tyoon 5 years ago


Help with trying to make an Arduino-powered MIDI keyboard-controlled ferrofluid pattern-making exhibit!

Hi guys, apologies for the long title. As it says, I'm trying to create a science exhibit that best explains a scientific phenomenon, while being fun and user-friendly. In this case, electromagnetism. Essentially, I want to hook a MIDI keyboard to a USB host shield on a Duemilanove I have lying around. The arduino reads those inputs, and outputs a designated pattern or single pin current to some electromagnets strapped under a tank of ferrofluid. When someone comes by and plonks on the keyboard, pretty patterns SHOULD HOPEFULLY rise and fall in the tank. Attached is a diagram for easier explanation. I have a couple of issues, though. 1. The arduino coding, which I haven't started with. A quick google search returned a post from Circuits@Home, where Colin from MAKE uses a modified PS3 script to recognise USB MIDI inputs. http://www.circuitsathome.com/mcu/interfacing-midi-devices-with-arduino-using-usb-host-shield This is my first real Arduino project. I've only tinkered with the I/O before this, nothing major. 2. A Duemilanove can only output 0.2 watts from a single pin (correct me if I'm wrong). Is this enough to drive a reasonably strong electromagnet? Are there some conditions I need to fulfil? Number of coils, materials for the core, etc. 3. I plan to make the ferrofluid with vegetable oil and toner. Will any old oil and toner do? Most websites come up with a specific variety, but that model usually isn't available in my area. I don't understand toner nomenclature at all lol. 4. Is it possible to wire/program the Arduino to allow a small speaker/synth to output sound, while having the current to power a set of electromagnets? I expect there to be about 12. That's all for now. I'll update if I make any discoveries/progress! Thanks so much!

Posted by cwong14 6 years ago



Prewound Electromagnets

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

Posted by gimmelotsarobots 10 years ago


ElectroMagnetic Pulse Generator

Does anyone know how to make an electromagnetic pulse generator and im not talking about an EMP

Posted by cvm726 10 years ago