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

Austrailian Electro!

An Australian site detailing almost 200 high voltage projects, and a few others.Some excellent photos, and lots of cool projects that could be put on here!!LINK

Topic by bumpus   |  last reply

why there is change in polarity in a bar magnet when it breaks?

A bar magnet when breaks does not attracts but repels from where it has broken ...   like [N-------S]   is a bar magnet on breaking it should be like  [ N---S} {N---S ] but it happens to be  [N----S} {S---N] ..  means there is "repulsion" between them WHY SO ?? (Pratically seen)

Question by aporak   |  last reply

Electro-former- Need plans for building an electro-former. Had 1 in tackle box / plastic garbage can for vat years ago.

I need plans to build a new electro-former. Built 1 years ago as a BFA student at N.I.U. It was so cool. The main unit and rheostat  were in a plastic tackle box and a plastic garbage can was the vat. This was used for heavy plating over sculpted wax. Unfourtanly, it had corroded while in storage. and I had to throw it out. I will be using it to add to me jewelry line. I can also provide step - by - step tutorial to post on this sight. Oh, this is used outside under a covered building.. no need to worry about a scavenger for fumes.                                                            Thanks for your help and ideas!      

Question by bhaworth1   |  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

Can it be made? electro-stim

I am wanting to make a special gift for my man this valentines day.Is it possible to make one of these with things lying around the house, or maybe a local store?This is a device that I can put on my mans "man-hood" and it will send electric waves through it.You can see it here:a ---FRIENDLY--- link here:http://www.therimbastore.com/Novelties05/ElectroPowerbox880.pdf-“Electro sex is a method of sexual stimulation involving the use of low voltage electronic signals to stimulate the nerves in the sexual organs into triggering pleasure and orgasmic response. Utilizing electronic signals to duplicate and increase normal sexual stimulation can have quite a profound effect on the sexual arousal of an individual or individuals. The nerves can be triggered in a way that never occurs, even in the best "normal" sex, or with friction or mechanical vibrators. Nerves are electrical triggers, and by applying electronic signals to activate them, the feelings are incredible.” When you realize that ALL impulses in the human body are electric impulses... it's obvious that you can stimulate an orgasm using the right equipment and tools.

Topic by heleena712   |  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

How to build one of these electro magnets?

Ive seen plans to build electro magnets where a metallic object is dangled upside down. this company inverts it so the metallic object is propelled upwards. from some of the pictures ive found it looks to be four magnets working together. any one have any info on building one from scratch? the first site below have videos of it in action. http://www.floating-lamps.com/floating-technology/ www.crealev.com

Question by autoflow 

how to build a strong electro magnet?

For my project, i would like to build a strong round electro magnet. i would like to know how i can build one.. i mean number of turns, current, diameter of wire. can we connect the coil to main power supply directly? i need a very strong magnetic field, one of my purpos is to levitate another magnet with out any support of strings (freely suspending in air). thanx in advance.

Question by allsparkunleashed   |  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 there a problem if my copper coils for an electromagnet are heating up? Answered

 I have built a few little nail style electromagnets and they all heat up.  If there is less power its slower but it still does.  I have experimented by using this heat but on smaller coils it will start to smoke because it is to hot.  This made me wonder if this is a short or actually an apply-able heat source.  On a very large coil heat is generated but not enough to make smoke so is guess that it is actually losing power so it can't be a short. SO CAN I USE THIS METHOD TO MAKE A MUG WARMER OR IS SHORTING OUT THE BATTERY

Question by jj.inc   |  last reply

Powering electro luminescence wire (EL wire)

I was planning on doing some work with EL wire, but I didn't want to use a battery powered system.  I wanted to be able to plug the whole thing into a wall outlet for power, because I thought that would be nice and convenient and all that, but I had some questions: 1)     Would I need to reduce the voltage of the outlet first?  It's a standard 120 volt outlet. 2)     What components would I need between the outlet and the wire itself to make it work? 3)     What length would of wire could I expect to light with this setup?  What is the limiting factor? I'd appreciate it if anyone could help me.  I haven't ever tried this before, and haven't really explored EL wire before.  Thanks!

Topic by Avren5   |  last reply

Whats Better Volts or Amps? Answered

I know the two are completely different, just so you guys don't leave any I'm an idiot comments.  I was wondering if anyone knew what makes a better electromagnet for my coil gun.  Should I look for higher amps or just as many volts as I can find

Question by jj.inc   |  last reply

question about an emp and a electro thermal plasma expansion arc chamber.?

If i took the basic idea of using an emp that uses a flash camera and attached an electro thermal plasma expansion arc chamber mentioned here at instructables around the coil (of the emp replacing the epeac's coil)and instead used all the wires to connect to the capacitor and the other ends (not the coils ends) to the switch, with the coil seperated from the epac with insulation, with the nail in the middle of the coil what would happen? scientifically? anything?

Question by ilovewinter   |  last reply

how do you make an EMP? Answered

How can you make a little EMP, only strong enough to disrupt (not destroy) electronics? i would be nice if re-usable, or pocket size.

Question by necropolian   |  last reply

electronic magnet that produces enough force to lift weight

you have an unlimited power source. now is it possible to create enough force at the right "degree" that would be repelled by the earth instead of attracted.. so like a floating magnet. but its strong enough to lift large objects..... like maybe a human?

Question by fireball9919   |  last reply

How do you make an Electro Magnetic Pulse Device? Answered

I would like to make and EMP device to blow an RFID. I understand that it is a capacitor and a coil.  And that you charge the capacitor up and then discharge it through the coil.  But what size and voltage should the capacitor be, and at what what voltage do you charge it and how thick does the wire need to be? Is it all about the voltage of the cap (12 volt or 400 volt)  or is it more about the size of the cap? Thanks

Question by Aussie14   |  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

2 Tesla Electromagnet? Answered

I need ideas for a 2 tesla electromagnet. I am trying to make the strongest magnet possible without additional cooling from a fan.. I don't know whether or not I can use high voltage, and low amps, or High amps, and low voltage. Or even inbetween.. Also, throw me that calculation for the electromagnetic strength. And if you could be awesome, explain to me how to use that formula, as I am not mathematically inclined. Thank you.

Question by Justdoofus   |  last reply

How do I make an Electromagnet? And a few questions about them and regular magnets?

   I’m looking to learn about electromagnets and magnets. I looked up all those common videos on YouTube of course but It’s not the same as asking people who can tell me directly how to go about making one and things I can do with them.    Here is what I know about electromagnets so far. I know that you wrap wire around a piece of iron neatly (the more times you wrap the stronger it is). Then you attach a battery to the ends of the two wires that are left and then you have a electromagnet. I also know that to much power is bad because it can heat up. I want to make some cool things with electromagnets. So here are my Questions: Center Of The Electromagnets Questions - What is the best thing to put in the center of a electromagnet? - Is Iron the best and if so what is the best type of iron to use? - If different materials will have different effects could you please list them? Wire For The Electromagnets Questions -What kind of wire works best? -Will thinner or thicker wire wrapped more times around make it stronger? -What is a good wire to iron ratio? Power For the Electromagnet Questions -Could I use a DC wall Plug instead of a battery? -If I use a wall plug could I make a separate Positive and Negative electromagnet? Few Random Questions -What materials will that block electromagnets? Which works the best? -What can you tell me about electromagnets that I didn’t ask? Thanks for reading guys hope you guys can help. I check this constantly so feel  free to pour Info in here.

Topic by Rich The Poor   |  last reply

how can i make a laser induced plasma channel for an electro laser?

To shock something far away without direct contact.

Question by mikmkt93   |  last reply

Trying to build an EMP generator for school demonstration, anyone know how?

I have high voltage capacitors, as much wire as needed, switches, LED's, giant iron core, batteries, and slightly above basic knowlege of electronics, electromagnetism, ect.

Question by baldou16   |  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

how to build a coil gun

Good day , I would like to build a coil gun but I don't want to use the disposable camera method I want to build my circuit from scratch  , I'm asking for some guidance , can you help me please 

Question by franzakeem   |  last reply

How to make a virtual drum kit with a pc keyboard or a simple music keyboard?

Please anyone instruct me how to make a virtual drum kit using any of these above mentioned methods. I've seen some instructables,but I'm not an electro-savant so I could'nt understand much. Any help with a VIDEO tutorial (or not) will be appriciated. Thanks.

Question by joeyjerry   |  last reply

Electromagnet projects? I need some good ones. Answered

I have a whole lot of copper I have been collecting over the months. Some of many gauges. I even collect the field coils in universal and 3 phase motors. Anyway, if any of you guys have any ideas about anything to make, or even anything INVOLVING electromagnetic's, give me a holler. Also, I don't want anything non-electrical related. Such as making pretty ponies out of copper wire. ----- And perhaps you can throw me some other hints, and tips. I considered myself a professional back when I was like 12-13 just because I knew how everything worked. Well, I was a retarded 12 year old. I thought I knew everything and that people were wrong about certain things until I learned about Ohm's law and many other laws regarding electricity. I know a good deal now, but I need some help and tips.  If you have any formulas that I need to study in order to fully know how everything works, and works together, please, I am more than interested to learn about it. I can only do Ohm's Law, as that is basically the only one that I know. I know how to convert amps to watts, and whatnot. But basically, just need a heads up on how to learn this. As I will probably be studying Electrical Engineering as I continue my journey through high school. I don't know if I am the only person on here that awkwardly likes messing around with stuff, and don't know how to build it.. I just basically like to hook things up to electricity and watch it do it's magic. Basically that's what my whole life was doing, applying electricity and freaking out about how amazing it is. Basically that's my life story.. In a question that I asked, and now am off topic. Thank's for reading my entirely boring passage. 

Question by Justdoofus   |  last reply

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.?

Question by djvbb12   |  last reply

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

Question by Jakyl 

Fun uses for Reed Switches?

Reed switches are electro-mechanical devices that opens or closes a circuit when a megnetic field is present. They come in normally open and normally closed designs and range from the size of a grain of rice all the way up to several inches long. A relay, another electro-mechanical device, is comprised of a reed switch and an electromagnet trigger built into one housing. Common uses for reed switches (not counting relays which are used in virtually all electronic devices) include the 'pick ups' on bicycle computers and the sensors on window and door alarms. I just ordered a bunch of reed switches and I need your help in coming up with ideas for what to do with them. Post up your ideas for some things that could be made or modified to be triggered by a magnet coming in close proximity to a reed switch. Remember- the magnet does not have to touch the switch, just get close enough that the magnetic force trips the switch. The stranger and sillier your ideas are the better. Note: this is not a contest and there are no prizes. by posting an idea you are giving your consent for anyone who reads it to use your idea. Posts about integrating reed switches into knex firearms will be ignored (no offence, it's just not my cup of tea).

Topic by Handsome-Ryan   |  last reply

human chipping?

I know think I am considered to be crazey, but I know what was done to me....I need something that will detect a chip in my body, and something to block it I know that that there are detectors...but I dont know which one is good and I dont have alot of money to spend. I was told to block it with metal..or copper...I used copper roofing sheidling( I dont think that worked...there are companies selling pants for rfid but you dont know if your getting the right info....or is there a fraud

Question by thefrightendone   |  last reply

any starter projects?

I am really new to electroic hacking but i love the thought of making stuff out of crap electronics, i have an old portable b/w tv , a old flatbed scanner, a pistol grip laser temp gun. is there any ideas on what i can build out of these and some other stuff? this will be my first project. i do have some knowlage about electricity and i am a do it yourselfer so i know tools. any help would be great, Thank you

Topic by wiccanman82 

Where can I find strong ring magnets?

I want to make a magnetic levitated suspension. I am not sure it will work as I expected. But I need em' ...... Somebody please tell me where I can find em' I don't wanna spend so much for those mags neither do I want to damage costly things to take those mags outta them.... I thought of using electro magnetism....but i am still learning more about it and that procedure is damn expensive Please help

Question by SravanamE   |  last reply

Best ElectroStatic Influence Machine?

What's the best electro-static influence machine?  Like which one can output the best sparks for the spinning input, ie which one is the most efficient? Wimshurst Sectorless Wimshurst (Bonnetti) Van De Graff Voss Holtz Lebiez Leyser Bohnenberger Wehrsen Wilson Or some friction (not influence) based electrostatic machine? All of the influence machines are pretty similar, but I need to make a fairly small one (think disk diameters of only 3 or 4 inches), and i'm trying to make it hand held, so efficiency is a must!

Topic by guyfrom7up   |  last reply

Australian "Throw Out Week" FREE Electronics a plenty!! Some suggestions please.

Here in Sydney Australia we are having our 6 monthly "throw out week". This is a kerbside pickup of hard rubbish. They often include electronics and the like. Tonight I plan on going out to "collect" some useful items. Just picked this little item up on a walk home, in case with a new set of batteries inside. Last clean up I found a brand new digital camera working in box with all accessories... Can anyone think of something to make with it? I plan on posting more objects tonight.

Topic by Lftndbt   |  last reply

How to install an LED on/off Indicator to Monitor 24v AC line?

I want an LED indicator that will lite when an AC circuit is on. The line/output is 24vAC at .5A. This is an irrigation controller, which sends 24vAC to activate a water/sprinkler controller valve.   I need a basic cicuit design and/or instructions. Googling led me to the 3 pages below, but I am not sure what to do. Any advice appreciated.  Thank you. http://www.boat-project.com/electro/panellight.htm http://www.discovercircuits.com/DJ-Circuits/aclinepilotled1.htm http://www.electro-tech-online.com/datasheets-manuals-parts/41821-1n4004.html

Topic by 222fbj   |  last reply

how can i tune a received ightwave like a guitar's strings and what is the energy required per kHz?

                                                                     Is a light wave like a guitar string?  Can i take a received electro magnetic wave and tune it? For instance, can I take white light into a device and change the waves properties so that it comes out as red light, or microwave radiation? The applications could be staggerring. If, for instance, I could take incoming sunlight and tune the wave so that the output was alternating current electricity. This would seem to me to be a far better way to harness the enormous energy contained in a lightwave.

Question by tswartwood   |  last reply

How to make a model slot car drag strip timer? Answered

I want to build a slot car model drag strip in HO scale with all the bells and whistles.  I wan the electronics to run a Christmas tree starting light, catch red light disqualifications, determine who wins, measures and reports on a 'billboard' the reaction time, elapsed time and top speed.  I can do all the other stuff like making and wiring power tot he track, make competitor starting buttons, adjust track voltage to power the various classes of car but I can't do the electronic stuff.  Can anyone help?

Question by Willys36   |  last reply

How do I control multiple servos with the Boe-Bot?? Answered

How do I control multiple servos with my Boe-Bot? I am currently making a robotic arm and I have 5 servos. So I decided to use my Board of education     rev d boe bot circuit to control them because I want to be able to program it. Would any one know a way to do it? I do know code for controlling the wheels on my boe bot which are servos but I dont know how to do that on the breadboard. I will continue to experiment but any answers would be appreciated. Thanks, Electro Nerd 

Question by Mudbud   |  last reply

Best magnet size to coil size ratio for an electromagnetic generator?

What is the best magnet (neodymium - disk shape) size to copper coil size ratio for optimal electron production per one break/pass of flux lines across coil at a 1/2" distance? For instance, if magnet is 2" diameter what is best inner diameter for copper coil? Best number of windings? Best gauge wire? what are the best specs for optimal electron production before you reach "over kill". I know some things are variable like core material and magnet grade. I'm looking for an all things being equal kind of scenario. Also what would be the best thickness of magnet at 2" diameter? If anyone could point me in the direction of any existing tables or ratio information on this subject it would be appreciated. Thank you.

Question by BishopKnight   |  last reply

how to make an isokinetic

Hi every body i want to design an iso kineticsystem for body building gyms... Isokinetics means exercise performed with a specialized apparatus that provides variable resistance to a movement, so that no matter how much effort is exerted, the movement takes place at a constant speed... i don't know how can i make a mechanism that it can make a resistance for the same speed of machine because of my field of study is computer but i had to design a isokinetics machine... but i think that it can be in some path: 1) it can be electro mechanical by using a DC motor with some gear. 2)it can be made by a cylinder that it has a little hole,and we can move oil into the cylinder by cylinder movement but oil moving happened with same speed such as car Shock absorber. 3)etc... please help me for design and make an isokinetics. this is my mail: sin.majidi@gmail.com i waiting for your helpful proposal.

Topic by sina majidi 

Unlock the door to work shop, hands free, when hands are full.

I am looking to have a way to unlock the door to my work/ wood/ hobby shop in my back yard with technology similar to that which has been used in some newer vehicles, whereby the trunk is unlocked and opened when the user places their leg under the rear bumper when they have their hands full. I don't know how this works, and I haven't heard of any possible problems with this technology. I'm assuming the user has some device carried on their person and there is some kind of proximity sensor or similar. I would be willing to carry what ever might be needed in my pocket at all times, just as I normally carry my wallet with me at all times. A fob of some sort, a card in the wallet. I just don't know how this works. I would like to also have a way to unlock the door should I ever forget the needed device, or in case of possible power outage, etc. Thank you all for any ideas you may have.

Question by stevecinstrfme   |  last reply


I am going to start building projects from here (instructables).So i need a toolkit but i am unsure what i need.But I think this will do: A voltmeter or multimeter - Digital or analog i am confused A soldering iron - i already have this A screwdriver set A Drilling machine - I think Bosch would be nice but which one impact or regular and wired or wireless. And am i missing anything above......and hey whats a hot glue gun.Bosch has that but do i really need it? I am not going for big projects so i don't need a router or sander. Does any1 know what are the types of blank circuit boards i mean the circuit boards which do not have any components soldered on. I got a PCB yesterday which had all the holes each row connected to each other by copper strip....that makes things very hard.....And how do i get a third hand in INDIA.... I liked rstraugh's Third hand www.instructables.com/id/Third-Hand-A-multi-use-helping-hand-for-electro/ But the thing are not available in India easily.So can anyone suggest me an easy one.

Question by pratyushpmhptr   |  last reply

Physics - Tech engineering software, that is fun?

Hi, Just a quick question... I ran across something called Gmod, or Garry's mod software today by accident. This one here... http://www.youtube.com/watch?v=Ui7S1ToK49Q&feature;=related It looks pretty neat, sort of a mechanical play thing. But, I'm not sure how true to reality the software is, also you apparently need to own a main platform software to use it, like Half Life. I don't have any of the games needed to play around with Gmod. I started to wonder if there is any other software out there that works as an, across the board experimenter's virtual lab? Sort of a mechanical, electronics virtual plaything? I'd think that engineering tech schools would have software such as this, (CAD comes to mind) but I didn't quite find what I was looking for with a google search... Not exactly sure what the best search term would be for something like this? I've come across virtual electronics software, but maybe I'm asking too much for a multi electro-mechanical environment. Has anyone ever used software like this, particularly something fun to play around with, without being to dry? Free would be nice as well, but I'm probably pushing the envelope there a bit! LOL.

Topic by bart245   |  last reply