Permanent Magnet Motor

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   |  last reply


Magnet strength for DIY VAWT

Hi, does anyone know if it is better to get stronger magnets for a DIY turbine? Is it always better, or only to a certain degree?

Topic by elmejor06   |  last reply


Magnetic Table Holds It All Together

All that space under your dining room table has been going to waste... until now! Install neodymium magnets all over the place and you have an interesting concept. I'd be in constant fear of knocking a cup and saucer onto the floor with my knee, but it's not like anyone's really gonna make this and use it. Right? linkvia Gizmodo

Topic by fungus amungus   |  last reply


Newb questions - magnets behind mirror!

Hi! I'm incredibly new here and already in way over my head! Hope this is the best place to ask this. I wanted to create a mirror that is magnetic to hold tweezers, nail clippers, etc. -  lots of little metal cosmetic bits that get lost around my home. I can't attach magnets to the items themselves because they are too small - would it be feasible to glue some rare earth magnets behind the mirror? Or will I just get a giant chunk of mirror embedded in my face? :( I'm trying to spruce my home up on the cheap and keep the small space organized. I have a sampler pack of rare earth magnets from lee valley and some framed mirrors already. If this is feasible could anyone tell me how far apart I should be spacing the magnets?  I feel like such newb! I guess I am one. But anyway, I humbly beg at your feet! Please help! Thanks folks!

Topic by Stasiasilver   |  last reply


Magnets, Magnetism, Field lines ???? An expert is needed for green wind power.

This is best placed in the green group as it is for the production of green electricity, but I think that it would not be out of place in the science section also. I have an idea, quite probably not an original one but an idea all the same. It came about as we go camping as a family and have been off the grid a few times. Basically we have had no way of charging our electronic devices for longish periods. Solar power I hear you cry, well that is all well and good if you live in a country that has good sunlight, but here in the UK it can be unpredictable and not produce enough charge to power modern devices. I am mucking about with dynamo’s on the bikes (pedal ones) and wind up devices. Something I am looking into is things like wind power or improved dynamo power. The basic principal behind all of these forms of power production is that of passing a conductor through a magnetic field to produce a potential difference on that conductor. Simples (reference to meerkat advert http://www.youtube.com/watch?v=NBu0OtC6m9g). It has been a very long time since I have done anything like this (way back in school all those years ago) so please stick with me on this one. If I remember right the principal theory is that 1. The higher number of conductors (or loops in the coil) that passes through the field lines causes the voltage to be higher. 2. The stronger the magnetic flux the higher the current production within the conductors. This is a bit basic to some of you I am sure but I still need to get it out to confirm my thoughts. If this is wrong please correct me, as the title says, an expert is needed lol The bar magnet field lines project from the N end and loop back to the S end in this fashion Image 1 Putting two bar magnets together with N and S facing gives a field pattern like this Image 2 Now this is where I need the most help with. Toroidal magnets produce a different field pattern, and as far as I can make out from the internet it looks like this Image 3 & 4 What I want to know is what happens when you put two toroidal magnets on top of each other, what happens to the field lines then. I have thought that there are a few possibilities on this, the first is that the circular lines will extend to encompass both magnets creating like an hour glass formation in the cross section. The second is that field lines will combine/intermingle between the magnets and create a figure 8 pattern. In either of the two possibilities the field strength will be increased to what could be considered a focal point between the two magnets. So with the technical thoughts out of the way and progressing on the assumption that I am correct so far my thought of a high powered dynamo is this. A central shaft that is spun by wind or other means, attached to this shaft are disks like platters on a hard drive, attached to those platters are the toroidal magnets. The magnets are aligned and spaced to give maximum condensing of the field lines between the upper and lower platter. In the centre of the two (or more) platters is a fixed platter, not attached to the shaft and is stationary. On this stationary platter are the coils, fixed into position. Image 5 The coils are shaped and could be something like the voice coils out of a hard drive, which would be good as they would determine the size of the platters, being key stone shaped they will fit together to make a ring of coils. Image 6 The whole idea is based upon the maximising and focusing of the field lines from the magnets to a point producing the maximum amount of energy as the coils pass through the lines. I also think that due to the shaft being turned having little resistance or weight that even small amounts of wind energy would be able to turn it to produce the desired outcome. Now this is where I ask you all to comment and take my thoughts to bits where I have assumed things that are wrong. I have no problems being told where I am wrong as long as it is not in a nasty way. Cheers all

Topic by Batdragon 


Is there a way to use magnets to hang paintings?

We have a small gallery and would like to find a way to use rare earth magnets to hang the art. I'm guessing a sheet of metal behind drywall and magnets with hooks on them. I just don't know if this would be strong enough to hold them in place. :-/

Question by philthylabwrk   |  last reply


Need help making a permanent magnet alternator

Hi - I have need of a small electric motor, and came across something called an altermotor.  This is a converted car alternator that requires a permanent magnet rotor assembly, the removal of the diode pack and a controller.  This is also supposed to be good for up to 4HP off 12V.  I've worked out everything but how to make the permanent magnet rotor.  Does anyone know how to do this?  I'd like to do this with high quality neo magnets, preferably with more than 12 bar magnets.  A car's alternator is the perfect size for the application, which is to run an air conditioner compressor for an electric car conversion.  A single 12V deep cycle battery would be able to run this allowing me to have air without cutting vehicle range since it would be able to operate off its own power system this way.  I'm not set on using a converted alternator though, if anyone knows a suitable 12V motor about the same size as an alternator that can produce at least 1HP and spin at least 2000RPM.

Topic by Inswitch 


Does Duct Tape really de-magnetize the magnetic strip on credit/gift cards? Answered

I have a Duck tape wallet, and this is constantly a worry for me... I'm solving this by putting Business Cards behind all my cards with magnetic strips, is this necessary?

Question by Wasagi   |  last reply


Tips and Hints

This is my invention for the day.  Use of magnetic tool holders is a very old, but handy way to organize tools.  My contribution to Magnetic Tool Holders is to use small, strong magnets (12 mm diameter) attached to a metal bar or in the photo, to my card table edge.  That in itself is still not very significant. However HOW the tools are hung from the magnets is significant. The problem:  If I put the magnets vertically and hang the tools vertically, the surface area of the magnet is such that often the attraction between the tool and the magnet causes the magnet to stay with the tool instead of with the table.  A magnet sticking to the tool, can be very annoying. The solution:  Placing the magnets horizontally--at the bottom--AND hanging the tools by their tips allows for very easy detachment and attachment.  The magnetic force is strong enough to hold some very heavy tools, like the pliers or long nose pliers without any difficulty.  The tools are easily removed and easily replaced.  This would also apply to any magnetic strip.   The key thought of the day: Hang tools from magnetic tool holders by their tips. Of course, another solution is to glue the magnets to the supporting bar--wood or metal--and clamp the supporting bar to the table.  That works as well, but is more permanent and is a little more work.  Also, if the magnets are allowed to attach by their full surface area to the tools, the tools are hard to remove.  

Topic by stannickel   |  last reply


can you use magnetic sheets in any laser or inkjet printer or just one or the other?

Or is there a printer that you should not use the magnetic sheets in?

Question by Gwendarlin   |  last reply


How can I build a pet door that opens with magnet/radio collars? Answered

MAIN QUESTION: Does anyone know how to build a pet door like this? Secondary (less important) question : How can I make two pet doors that open this way, but only one collar opens one door? I need to create a three way split in my house, [ A  | B | C ] one cat can access part A but not part C. One cat can access part C but not A. Both can access part B.  I would like to create two pet doors that open by sensing magnets or radio frequencies that can be attached to their collars.

Question by knicole5   |  last reply


When I see generator construction they usually suggest 1 stator and 2 rotors.

Most show 1 set of coils with magnets on a disc on each side. How would 1 rotor ( with magnets ) and stators ( with coils on ) either side of it compare? Just to be clear the magnets rotate.

Question by buteman   |  last reply


Fooling the robot by putting a very long question header instead of my original three words that I put up two days ago? Answered

I read somewhere?? that to put fridge magnet on the side of a fridge causes it to use more power. (Magnets are OK on the front). Is this true? If it is.....; why?

Question by Z..   |  last reply


To generate elect. is it better to have the coil spin within the magnetic field or magnets spinning inside the coil

Which is better for making a homemade generator powered by the wind? Tesla model suggests coil spins inside of magnetic field but most electronic sites suggest having the magnets spin inside the coil windings. Are more amps produced by having the magnets spin inside the coil windings instead. Couldn't you just use most any (machine pre-wound) coils from motors rated from 1 - 5 hp. and make your own rotor where the magnets spin INSIDE the existing windings from those motors? Helpful to me since they are already rated with rpm speed. Why would you make your own with so many used motors available?

Question by SpeedRacerTerri   |  last reply


What is the best soft iron disc thickness for 22mm x 3mm disc magnets

Hi, I am building a wind turbine with 12 , 22mm diameter x 3mm thick magnets on 6inch diameter soft iron disc and 9 coils on a wooden stator? Is the thickness of the soft iron magnet discs critical? Is 3.5 mm too thin or 10mm too thick?

Question by bulbwatt   |  last reply


magnetic device left on shirt /ink leaked onto the garment. how do i get the ink out?

Store magnetic device was left on. My husband being the impatient person he is tried to take it off. The ink leaked out onto the garment. How do I get the ink out. I can take the garment back with my reciept to get the device off but now left with the stain. What will take this ink out?

Question by cdwhitefeather   |  last reply


any idea's on magnetic generators that would generate 34.5 watts output (3.5 volts, 7 amps) need to cut power costs.

Aluminum Base 1” long x ½” Diameter Oil Impregnated Brass Sleeve Bearing 4” long x ½” Diameter Brass Shaft 1 ¾” long x 2” Diameter Brass Rotor 0.10” thick Mica Insulation 0.005” thick Mylar Insulation 0.04” thick Copper Coated Steel Wire (228 U-shaped pieces) .032” thick Copper Coated Steel Wire (12 coils of 11 turns) 0.014” thick Insulated Copper Wire 12 Permanent Magnets ¾” long, 5/8” wide, 3/8” thick o Fe, Isotropic permanent magnet material cooled in a magnetic field, Cast 9100 TS. 450 Brin, 2.2 Peak energy product. ** **magnet specifications: Alnico 4, M-60; 12 AL, 28 Ni, 5 Co, bal Crimped Cooper clips 0.30 thick Copper Tube 2” long x 2 ½” diameters. Acrylic Ring-Dimensions 3 ¾” O.D., 2 ¼” I.D., 3/8” 0.002” thick Plastic Insulation Paper Acrylic holding shapes Acrylic dome Liquid Acrylic                                                 rough parts list Parts List (there is a list of parts suppliers in the next section):

Question by wisteria92   |  last reply


What's the best way to dress up LED Throwies?

I'm interested in decorating my house with LED Throwies, but I can't think of a way to hide the battery/magnet assembly.  Does anyone have any (preferably cheap) ideas on how to add any sort of elegance to the body of Throwies without sacrificing the magnetic quality?

Question by SJBarag   |  last reply


Electromagnet Help! How to Make a Small but very Strong Electromagnet???

I need you help smart people of Instructables!I need to make a small Electromagnet, that uses minimum power (by that I mean the battery), but still has to be very powerful. I have a couple of questions that I need you to help me answer:Does the number of coils that is wound to the metal bar effect the strenght of the electromagnet?Does the wire gauge (20,24,28,30,34,36 wire gauge) make a difference is the strenght of the magnet?Does the voltage I supply to the coil effect the Electromagnet?What type of battery is best for an Electromagnet (AA, AAA, C, D), and what voltage (1,5V, 3V, 4,5V, 6V, 9V) ???Here is the thing, I need to make the Electromagnet super strong but taking up the minimum of energy, for example, just 1,5V. The things that are not important to me (doesn't play a factor in my device) is the number of wire winds to the metal rod and the wire gauge! So is it better to just make 1 or more (3,4,5,6...) layers of wire winds???Is it better to use thinner (36 gauge) or thicker wire (24 gauge)???Thank you a lot!Stanislav

Question by comodore   |  last reply


Bigger Rubik's cube?

If I try to make a bigger Rubik's cube out of wood, and even though I use the same size of magnets, would that still be possible?

Question by ylee31   |  last reply


how can I make a removable mural with heavy MDF shapes, using magnets?

Hi there, I'm trying to make a mural for our school, using MDF shapes that will be painted by the children. The mural needs to be removable for when the wall needs repainting. Somebody suggested adhesive magnets. Are they strong enough to hold pieces that are around 1,80m high and weigh over 6 kilos? I was hoping to use 1 or 2 screws on the bigger pieces, just in case they slide. Anyone has some experience on this?

Question by    |  last reply


Bird Hat!

Check out this fantastic hat, made of felt with a little birds-nest hole in it, complete with bird! There's a magnet in the bird and the nest area to keep it from falling out accidentally. I love this.

Topic by rachel   |  last reply


Instructables with the best intro picture

Which Instructables have your favorite intro pictures?I'm partial to:https://www.instructables.com/id/How-To-Cut-A-Mango/https://www.instructables.com/id/Magnetic-Rubik's-Dice-Cube/

Topic by ewilhelm   |  last reply


Are cans made of steel?? Answered

By cans, I mean canned food cans, not soda cans. From what I know, they are not aluminum because  a magnet stuck to one. And I don't think they are tin either. So what metal are they?

Question by Orange robot   |  last reply


solar powered throwies

In case you didn't know, a throwie is an LED with a small battery and magnet attached, that can be stuck to any metal surface. would it be practical to make a throwie with a long lasting lithium battery? or a small solar cell? just a thought

Topic by Antimatter500   |  last reply


Pythagora Switch. Simply Amazing!

Got this link from a friend. Some japanese kid show with Rube Goldberg-ish setups. Whoever set these things definitely have lots of patience : -)I love the one with the magnets at 2:16Which is your favorite..?

Topic by gyromild   |  last reply


What's the best way to put kinetic energy in batteries? Answered

I had the idea to have the kids at my favorite summer camp group to "pump" their own electricity because one of the more primitive camps in that group already pumps their own water, but doesn't use electricity. What's the best way to put kinetic energy in batteries? When i say best i mean highest mechanical advantage.   The ways i can think of are: -shaking a magnet through a coil of wires -spinning a wheel to shake  "          " -pedaling to spin the wheel to "       '' -using a lawn mower sort of wheel. Also to refresh my memory what are the other ways (with a higher mechanical advantage) to move a magnet with coils to generate electricity?

Question by Houdinipeter   |  last reply


Are canned food cans made of steel?

By canned food cans, I don't mean soda cans, I mean the cans that pineapple and corn and other stuff come in, just to be clear. From what I know, it's probably not aluminum because it is magnetic. So what metal is it? Is it combined with different metals?

Question by Orange robot   |  last reply


VAWT a new way to wind generation

Guys need help to realise its feasiblity and pros & cons. This project will comprise of a renewable energy source which is controlled by TI msp430 controller by closed loop system. This renewable energy source will use a magnetically levitated vertical axis wind turbine with single phase permanent magnet alternator made by our team. There will be 3 stationary wind guide vanes/flaps of concave shape on the outer periphery of turbine. These vanes will be controlled by dc gear motor for constant wind flow and protection against high speed winds. Using perturb & observe MPPT algorithm on DC-DC boost converter, constant DC voltage for GRID integration is made. A lower energy Bluetooth module will send data on user computer about whole system parameter, hence making the whole system to be smart and hence data is saved in database. https://www.youtube.com/watch?v=fC5hYLjhO9U

Topic by nitcool   |  last reply


Make my own turbine or....?

I'm going to be building a charging station for my laptop, cellphone, ipods. I got the idea from the S.P.R.E.E. article but I want to incorporate a wind turbine into the system. I'm struggling to find a turbine that's small enough, or even a permanent magnet DC motor. Am I missing something or would I have to make my own DC generator? Thanks in advance!

Topic by egoods   |  last reply


Don't you hate it when.....

...you make something and forget to document it because you're so engrossed. I made a night light for my daughter. It is inside a coffee jar usually but for getting a good picture of the tree I took it out. It has a tilt switch for on and off. Upside down is off. It's also got.... A lithium battery Wireless charging Magnet wire construction I'm posting this because I don't know if I'll make another.

Topic by xn1ch1   |  last reply


How to protect our house from EMF ( Electromagnetic Field )....Pls. tell me any idea...?

Dear Frnds, i, sameer gurav, mobile tower company installing mobile tower top on my residence, i read its radiation is very dangerous effects...so pls help to protect from this radiation. Tell me any idea how to protect my home from radiation (Mobile Tower Radiation). Thanks, Sameer

Question by sameer.gurav   |  last reply


how can I make a removable mural using heavy MDF shapes?

Hi there, I'm trying to make a mural for our school, using MDF shapes that will be painted by the children. The mural needs to be removable for when the wall needs repainting. Somebody suggested adhesive magnets, because they show no marks. Are they strong enough to hold pieces that are around 1,80m high and weigh over 6 kilos? I was hoping to use 1 or 2 screws on the bigger pieces, just in case they slide. Anyone has some experience on this? Any other ideas for holding these pieces on to the wall?

Question by    |  last reply


How can I start/stop a waterpump (230V 500Watt) using a magnetic floating switch which can switch 230V max 1A 15W? Answered

I have a cleanwater pump in my cellar 230V / 500W to keep the floor almost completely dry. I have a liquid level sensor that can switch max 250 volt, max switching current 1A, and maximum switching power 15 Watts. I don't know enough about electronics to know how to fix this problem. But I do know that the switch won't work when I connect it directly to the pump... So how can I get this working (low cost)?

Question by NiekZ   |  last reply


Light Bulb Lamps

Oh what to do with the light bulb now that you're basking in the efficient glow of your CFLs? Well, you could convert them into these light bulb lamps as Sergio Silva has done. It's a pretty sweet item with neodymium magnets holding them in place on an included acrylic plate with embedded bits of steel.However, the price tag is $650 for the set which is pretty flippin' ridiculous for what can be remade with scrap and $10 of materials, if that. To be fair, the light bulbs Silva makes are sturdier than the regular item, are all made by the original artist, and are limited to a run of 66. So you're buying some design-y street cred before they get knocked off and sold for one-tenth the price. Linkvia bbgadgets

Topic by fungus amungus   |  last reply


One mans garbage...

Really is another mans gold! I'm the type of person who, when seeing something internesting, picks it up. For instance, I have found: @ A working VCR (and I use it) @ A small TV (not broken, just REALLY old) @ Microwave ovens (several, not a single one broken) @ Old computers (the joys of Harddrive magnets) @ A 27 inch Panasonic TV (it's working perfectly, i use it daily) UPDATE 10 July 2010 @ A working DVD player (slot jammed, fixed it) @ A PlayStation 1 (not tested, I'll report back) (tested it with the AV cable I also found, it works!) There's no shame in taking "trash" off the streets! I got some funny looks having a small TV strapped to my bike, I take them as compliments! What I'm trying to say here is basically Save the planet, finders keepers!

Topic by Kirbsome!   |  last reply


How Do I Change AC hertz? Answered

So the one local power company has a complete monopoly on my city. I was thinking that this summer, I would produce my own power, and possibly give some away free to my neighbors. I am thinking that I will use solar steam generators to make steam that will power an array of Tesla turbines like those of mrfixits to generate electricity. The only problem is that the steam will likely push the turbines far above the 60 hz we use in the US. Is there any way to reduce the frequency without slowing down the turbines? Also, why does AC need a hot and a neutral wire to function? Isn't the whole point of AC that you don't have to send electricity all the way to the customer and then bring it all the way back? And are there any good i'bles on winding generators, magnets, etc.? Thanks!

Question by mad magoo   |  last reply


Need help and ideas for graffiti

Inspired by the GRL i've thought of a cool idea for some graffiti:Overview:Using clear, or almost clear UV paint in 1 or 2 colors do a artsy stencil somewhere.then using a solar garden light, switch the LED for a UV and waterproof the wires and board somehow and find a way to attch so its hidden or out of reach.I would want to do this on the side of an overpass, perferably metal so i can use magnets to place things wherever i want. The panel would charge the singe rechargable AA (might mod to last longer) and then after it got dark enough the UV would show the work for a few hours untill it drained the battery.What i need help with:will paint like this ( http://www.clearneon.com ) be bright enough, any other suggestions for paint that won't be obvious unless its lit up.Will the UV LEDs be enough to see the art from a car driving below?any general mods or ideas to improve it?

Topic by aaronx   |  last reply


High carbon steal annealing/tempering

First off, I'm not entirely where to post this nor if it has been posted elsewhere (i did do a quick check but i didn't spend too much time on that endeavor). So if this is not the correct/best place to post this i will move it and if it is elsewhere then i will delete it. This topic starts with a question from something I just recently did. I got a high carbon steel marking knife (its a Hock tool) and when i got it, it was bent and i heated it up to a nice red color, let it cool, tried bending it, and broke the tip off so i sharpened it back to a point and heated it up until it was no longer magnetic and heated it at 450F for about an hour. After doing this and checking some charts I was expecting a golden/brown color but instead got a blue color throughout most of it. So do i need to redo this or is it harder than i would expect from a blue colored steel? So I'm sure there are plenty of resources out there for figuring all this out but i was hoping this could be a centralized area for anyone to get all the information they need on this topic. what are some tips/tricks on annealing/heat treating/tempering iron, steel, and high carbon steels? is there a difference between the three  (annealing, heat treating, and temper)? what is the difference (if there is one)? what should someone expect from doing something like this? what would each color be useful for (which would be best for a drill bit or which would be best for woodworking tools etc.)? any tricks of the trade? any personal tricks that you wont find anywhere else? anything else to add? ANYTHING that is relevant would be helpful, im sure there are many people that could benefit from a list of tips from those who actually do these things. if i remember to do so i will post this blue marking knife that i'm talking about.

Topic by pmk222   |  last reply


Need some ideas

Ok...at my other "home" www.geekstogo.com someone came up with a question about methods of making a "sherlock Holmes type chess board" where you could place one (or multiple) chess pieces in a specific location and have it open up a secret compartmentlinkage....and it got me really interested in attempting to build such a nifty contraption...we through out a bunch of ideas on how to get the chess board made and wired up....had some good ideas for using reed switches and either a push solenoid or even a linear actuator (to open and close a drawer depending on switch positioning)...i think i could work the wiring and stuff up...but what i need is some ideas for what to do instead of a chess board (i'm wanting to make this for my brother and his wife and i already got him a shot glass chess set...so he doesn't need another one of those)i though maybe i could make a water fountain where it would have a removable piece (or pieces) that when you put it in one location it will turn the fountain on and off...and if you put it somewhere else it would open up a drawer or something...i've got these faces from CPR dummies (don't ask) that i was going to use to make the fountain (like the water dripping from the open mouth) and either make some of my metal hands or buy some of those wooden art model hands or something...and make it that way...but i'm not sure if that's what i want to do (also not sure if the reed switches i'm planning on using are capable of switching 110v AC for long periods of time so suggestions on materials would be nice)another idea would be a big wall art piece like the Magnetic Multi Panel Mural...but i'm not sure how to integrate a drawer setup in something like that without getting inside of his wall at his house (would be fun though....wire it up in the wall...and have like a drawer open across the house when you move a panel or something like that)also...i guess it doesn't have to open up anything...it could do anything when the switch is on or off or whatever....any ideas are welcome

Topic by crapflinger   |  last reply