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I want to know if anyone knows a way to do this at home. Acoustic levitation is a way to levitate objects in space using sound waves. That site gave a very thorough explanation of how it works, but not how to do it. If someone knows how, I'd love to see an instructable.

I need help for a mini-project under a prof. My topic is magnetic levitation and i need the procedure of the experiment. pls help

Wow, just in time for The Mad Science Fair- an awesome magnetic levitation set-up. The Superconductivity Group at Tel Aviv University have been working on thin-films of superconductive materials and have found some...cool effects.  The thin films will apparently have a few defects, resulting in very specific areas where the magnetic field permeates.  This rigidly constrains the composite, allowing even "up-side down" levitation! (locked in space, beneath a magnet.)  Would be so awesome to play around with but apparently the deposition of the superconductive film is a real challenge, not to mention the sapphire substrate. A forum post at HI Capacity had these links, probably after a member saw Gizmodo's article "What the Hell Magnets? Why Are You So Amazing?" Via youtube: ASTCvideos Quantum Levitation QuantumLevitation

Has anyone tried building this electromagnetic floater, and had it working? Because I'm trying to make it, except it doesn't work for me....I don't know whether it's the circuit, or just me. P.S; Are most of the circuits on this website reliable?

Hi! I am setting up a levitation system and need to estimate the amount of voltage and current that is needed for a 2" dia. coil to produce 4800 Gauss. I don't have any restrictions/requirements on the core, number of turns, etc as long as it would produce 4800 Gauss with a 2" diameter. How can this be calculated? (I have spent a lot of time googling for such information, but I am pretty confused and didn't find how to calculate this) Thanks!

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! 

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????

If anyone is looking for an advanced cool project, here it is: Acoustic Levitation. Scientists at Northwestern Polytechnical University in Xian have used sound waves to levitate small creatures while they are still alive, without causing them any apparent harm.

I saw this video on Facebook which shows a Ouija board themed cake with the planchette hovering aboard the cake surface and spinning.People have asked how this is done, but the maker is not answering.It looks to me like it must be magnetic. I don't really care about cakes, but it would be cool to make something that levitates and even spins like this. A "haunted Ouija board" would be an obvious application fro a haunted house. So, how would you duplicate this effect?

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?

I need help understanding the circuit attached, from what i understand is that i can power it from a 12V mains adapter. The one i have is 1 amp which i think is enough. But more importantly for the grounds, that i should connect them all up to the ground coming from the 6 pin on the left opamp. As though this ground would act as a central one, with all the other ones connected to it. Is this correct or not, if not then please explain to me how i should ground this circuit. I claim no rights to the content in the link and am using it for my own recreational purposes. http://uzzors2k.4hv.org/projectfiles/magneticlevitator/Magnetic%20Levitator%20circuit.GIF

You may have seen my award winning Magnetic Levitation Sculpture instructables project. (Won the Magnetic Challenge contest, and hoping to win the Epilog laser challenge!) Kits are now up on Kickstarter if anyone wants to get one.  There's many models to choose from, depending on how much you want to back my project, including a limited edition acrylic version.  They will be available for sale after the kickstarter project is finished funding (for an additional $10 plus shipping and handling) if you'd rather wait! Thanks for your time!   John

I found this instructable on making the magnetic air bonsai plant but id like to make one that lifts much larger objects maybe up to 500lbs... I understand how it works in principal but i don't have the knowhow in order to go out and purchase the right components. Here is the link to the first one https://www.instructables.com/id/Arduino-Air-Bonsai-Levitation/

I got about halfway through making one of these before I started questioning its seriousness. Is it a joke? Or, hopefully, is it valid? UPDATE:Don't you just love who gullible some people are? ; ) Anyway, now that I've shared this with everyone, should I delete this topic. I'm not sure how it could benefit anyone else by leaving it up, and I try to clean up my messes.If anyone knows the latter to be true, could you give the scientific explanation for why a cellphone can levitate a playing card?Looking up how to add a video now. :P Here's the URL in the meantime:http://www.metacafe.com/watch/448034/secret_science_anti_gravity_revealed_homemade Errr...Perhaps I'll make an Instructable on how to not read the entire set of directions in an Instructable on how to make videos. Mmmmm...recursion :P

If we look at some of the the ancient monuments we already struggle to come with just one idea how we could recreate it today.A monolith with a weight of close to 300 metric tons is one big thing.You certainly find some creative way of carving it out of solid rock about as hard as granite - even if ou only know bronze tools LOLBut that is archeology these days, always blind on one eye.Anyway, we just assume we carved it out already and somehow even managed to cut the underside off the rock without the 300 tons crushing the tools.No modern fleet of cranes could lift it if you could somehow get them into this remote quarry...And if we somehow would be able to lift it out we would have no clue how to transport it over 400km thorugh sand deserts as one choice, rocky terrain as the second or on water as a last resort with still 100km on land to cover.There is no evidence anywhere to indicate such a big and massive thing was moved from the quarry to the final erection site.....Mainstream experts claim wooden rollers were used - impossible in the terrain.And a boat or float able to carry it on the water would have been to big to fit on the river...Still the monolith made its journey and got erected in place....In other places we find walls and buildings created from single blocks of rock weighing in at around 50 metric tons for the smaller ones...In ancient Aegypt we find similar examples of large and heavy object being carved and moved around like they were made out of thin air.Again texts and other "writings" from sometimes well before our dark ages tell us about gods and people from the sky doing exactly that just by pointing at them and directing them with the hand and arm.Another indicator for this is that some of these huge monolithy rest on foundations made from individual rocks stacked up neatly.Computer simulations could not find any solution to get the monolith onto this base.Unless it would be stright and evenly down....In all other cases the foundation would have been crushed to dust by the weight and only the weight gives it it incredible stability without any mortar and just sand around it.Many theories exists on how these ancient gods were able to do their "magic tricks".Up to and including these gods being aliens or humans who traveled back in time from our own future.None of them though are really specific and prefer to only refer to "technology" instead.So lets take a close look at possible ancient options for levitation technology:How do you levitate a few tons of solid rock?We go small as we have to assume for once, size does not matter here.Practical and theoretical science provides us with a few options.For example by creating a lifting effect based on airflow - like a hovercraft.We know the gods did not create a sandstorm to move things, so that one is out.Next on the list is acoustic levitation.We do this already for fun and some real sience experiments, look it on Duckduckgo got get a liking of it.To make just 5 tons float in an ultrasonic node however would require a sound pressure that would liquify humans in seconds.Apart from the problem of placing and keeping the transducers aligned.Nothing you could do by pointing you hand and waving around...Einstein provided us with the realitve ;) option to simply nullify the mass of our rock.Several options are possible here.For example by making the rock vibrate at the same frequency as our gravimetric field.Sadly we only (so far) accept gravity as a constant force because we can't (yet) understand or theroise properly about what exactly creates gravity.From the same basic formula in Einstein's book comes option two : Eliminate the gravitational influence on the rock.In way too simple terms to allow a better understanding:Imagine the rock is a ball and gravity is an air stream.If the ball is light enough but not too light it seems to float in the airstream.With the right texture on the surface it even spins quite fast and gets even more stable.You could re-direct gravity in a similar fashion to make to rock float.A push with your finger and it keeps moving like it would in the waste emptiness of space.A slightly different theory from a different side uses vortex energy to make the rock float.The beauty behind this particual theroy is that it would actually match the ancient texts quite accurately.Vortex energy is a relatively new field of science and not always accepted, so take it or leave it.Directed energy can create harmonic resonances in solid objects.The idea behind the vortex is that a relatively tiny device is capable to induce this harmonic vibrations.A bit like Star Trek a second energy "beam" can lock onto this specific frequency.By modulating the positive or negavit amplitude you then can move the rock towards the origin of the beam or away from it.Directional changes would happen through just moving the source of the beam, like on a ball joint to keep it too simple.Why would this theory match almost too nicely?A vortex beam could be losely seen as a kind of tractor beam.And the "uneven" movement of these massive objects in ancient texts make it only more plausible.They were not following the terrain like they would have on some antigrav-platform hovering over the ground.Often they were lifted up hundreds of meters before starting to move towards their destination and then they were lowered down vertically.We don't know if there were levitation devices or even anti gravity devices in actual use thausands of years ago.The only thing we know if things were moved without sings of having been moved.And well, that we have no clue how to do it with our modern technology today....

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.

The levitator machines cant fly themself yet but what if they do? it would be possible to make a kind of a car if you use a field with alot of strong magnets right? I mean this: +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ another 4 electromagnets could be used as a sensor that detects thepolarity of each levitating box (if used 4 boxes) and a microcontroller just switches the magnets on + or - to move the object or car forward...

I want to make levitating shoes with an old pair I have lying around. i know magnets and electromagnetic fields will not work, so I has thinking of fan propulsion systems like in the hover crafts you can buy. Even getting an inch off the ground would be fantastic. I was wondering what your guys' opinions would be on materials and setup, or if you have done the project successfully what you did and maybe your layout. All help greatly appreciated. Thanks!

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

While tinkering with my latest creation, a 6L ultrasonic cleaner, I started to wonder...When using these actuators for cutting or welding purposes a horn is used to provide some amplification of the movement and to get the right shape for the tool.Oil seals, like used on drive shafts are no problem when attached to a node of the horn.And if you ever placed a small diameter horn into some water to test it you know the storm it creates.But what would happen if two horns are used on opposing sides of the container?At the correct distance the same static nodes like we see when levitating in air should appear.What would happen to the tiny cavition bubbles that shoot away from the horn?Am I correct to assume that, at least in theory, it should be possible to create a stable vacuum bubble between the horns?

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?

 An idea popped into my head a few months ago whiles reading about superconductors and how they create a magnetic "mirror image" of the magnet levitating above them. I imagined a grid of small electromagnets arranged similar to the pixels of a computer screen, each one individually controlled by a computer. Some sort of sensing mechanism, of equal resolution to the grid, would detect the magnet's flux at any given point and send that to the software. The computer would model, in real-time, how it must adjust the magnetic grid to compensate for the momentum and weight of the unique magnet floating above the grid. Basically, the software would mirror the magnetic field to allow for perfect stability and even maybe some level of control by offsetting the stability slightly to make the magnet move across the table. So is this even possible? Does it already exist? Do I get a cookie? *Target all weapons on that idea and FIRE! Shoot it down.*

 i want to make so that i can adjust the hight by changing how much electricity is being outputted. could someone help? this is for a science fair project sooooo yeah.

Hi I'm a subscribed user of instructables, and I've just finished my 1st instructable. My work is about magnetic levitation. I'm able to make a magnetic top levitate over a magnetic base. My idea started from a commercial toy called "levitron", and my instructable is a full detailed receipe to build a similar toy, using cheap or second hand objects, by yourself. My last concern is about copyright. I got my result on my own after a long time and a lot of research, and it's easy to understand that the object realized is made also with scraps, but anyway I'm worried if I can or I can't publish that. Can you help me Regards David Zuliani

Since we are into tesla http://www.flyte.se/ Can you theorize how they do this ? Maybe there is a motor inside...

I was going through all (yes, all) of the I'bles tagged in the Science category (to help populate the Physics Group) and ran across the following:Build Levitation Device. published by ermak777 on 12 Feb 2008.Build Levitation Device. published by kinofanat on 14 May 2008.The duplication is quite astonishing, right down to the typos in the description of the video. I've flagged the later edition as "Inappropriate", to help staff find it.

French artist Nils Guadagnin has built his very own hoverboard based on the hoverboards in Back to the Future II. It's pink, it's a board, and it actually does hover when placed on its platform. Integrated into the board and the plinth is an electromagnetic system which levitates the board. A laser system stabilises the object in the air. The board is hovering with the help of two CLM-1+ levitation modules made by Crealev. Hoverboard Project via geekologie

Is this possible?So I'm working on this project on levitation using superconductor and strong NeFeB magnets. I'm try to determine the possibility of replacing the magnets with electromagnets equally as powerful and of the same size if not smaller. But I'm bit skeptic about the idea as I'm not sure how possible it will be to construct such electromagnet (or buy them preferable). Is this something that is possible? can anyone reading this give me recommendations? thanks

It would be great if it is, because I have 2 or 3 around and want to make the electric levitation device.

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.

I want to know if it is possible so I can build a device to levitate a piece of wood with electromagnetic fields.#

I really like this television show. The masked magician show how to do great tricks and illusions. I even did some at school. Like levitating, walking on water, cutting someone in half and the wine and needle trick. Do you like it ? or what do you think ?

I want to do a science fair project on the matter but im going to have some fun with it and make one into a nascar track ! haha

I was thinking an ark reactor model or a small decked out diamagnetic levitating art piece sculpture thing I got it out of a laptop if anyone is wondering

My room is rather full so i had the idea to build a table that can be lifted up to the ceiling when not needed to save space and act as a cool feature.  My room has a slanted roof and the section that's not slanted ( in the middle) is 43 inches wide and 100 inches tall. length isn't a problem(more than 100")this spot would be an optimal place to build the "levitable". I have access to pulleys and string and all that stuff so i can build it no problem, but I'm not a master with ropes or pulleys or mechanics and I don't know the best way to make this work. Thanks a lot!!

I updated a video in my I'ble for the EL wire contest judging period. Now the video is gone and alas, I am not a finalist! Sadness :-( Whether or not the video had to do with the judging, it looks like embedded videos are not displaying from Vimeo. I tried a couple times with a couple videos and none will display in my published I'ble. (https://www.instructables.com/id/EL-Levitation-Wand/). Thought you'd like to know.

  Banana Split on a Stick Bamboo Bicycle Cardboard Coffee Table String Art Necklace Oatmeal Pancake Perforated Pizza Peel Stargate Gong Build a One Sheet Boat Machine Your Own Guitar Lacy Un-Mentionables EL Levitation Wand Exploded Photo Collage Install a Bamboo Floor Easy Bike Trailer Hitch Survive Zombies with Tea

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

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!

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

OK I had this idea. I was online and thought up this idea for an anti gravity machine. This is it: use extremely static negatively charged materials for anti gravity. It could work the same way lightning clouds do. The base of the cloud is negatively charged and the ground become positively charged. Now if the material of the anti gravity "thing" is charged with static electricity, wouldn't it repel the ground? Now I am by far no expert in any of this...I just thought it up. What do you guys think?

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

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

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 OR YOU CAN SEE https://www.instructables.com/id/Building-a-new-type-Vertical-Axis-Wind-Turbine-VAW/

Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic interaction of the charges. This was first proven by British mathematician Samuel Earnshaw in 1842. It is usually referenced to magnetic fields, but originally applied to electrostatic fields. It applies to the classical inverse-square law forces (electric and gravitational) and also to the magnetic forces of permanent magnets and paramagnetic materials or any combination, (but not diamagnetic materials). Earnshaw's theorem has no exceptions for unmoving permanent ferro-magnets. However, moving ferromagnets, certain electromagnetic systems, pseudo-levitation and diamagnetic materials are areas to which Earnshaw's theorem doesn't apply and thus can seem to be exceptions, though in fact these exploit the constraints of the theorem.  Can we develop a safer cleaner transportation method that involves electro magnets that can propel cars using the city's grid to adjust the power on the street or road to move cars. similar to  famous movies vehicles like STAR WARS(c) Repulsor Lift(c) technology or The MATRIX(c) Ships OSIRIS?

My skills include:  electrical engineering, welding, programming, re-using, muffins Here's a link to my featured Instructable: https://www.instructables.com/id/%22Beating%22-LED-Heart-T-Shirt-finished!/ What I'd like to make for someone:  Bike Speedometer Kit/ EM levitation kit/ metal sculpture I'd be willing to make this size gift package for someone: s,m,l I'd be willing to receive a smaller or larger size gift package from someone than the one I make for someone else: sure! What I like:  functional things, educational things, things that make you go 'WOW', hand-made things, re-used things, art, visually stimulating/pleasing, elegant, muffins :-P What I don't like: cupcakes, k'nex/legos. I absolutely can't have: Type of thing I'd love to receive:  A functional/mind-grabbing piece of art.  Alternatively, something solar/energy related. Would you be willing to ship to an address outside your own country?  Yeah, sure. Confirm that are at least 18 years old: I'm 18++; [opt] januaryelement is someone who can keep a secret and knows me well.

Hi !I created a group that seems not to have been ever created here yet."Class-Room" group.The main purpose of this group is to make a collection of every instructables that may be useful for school teaching, and that may be reproduced by pupils or students as science-fair or class-room projects ...Please, add your Instructables if they fit this description._Biology :"Be a Scientist : map your skin"Chemistry :"Carbonating""Kitchen laboratory II : The CO2 trap""Make crystal clear ice !""Make Rheopectic slime in less than 15 minutes !""Shelling a raw egg !""Sodium Acetate"Investigations :"Amazing Kite For Under $5""How to make Playdough (Play-doh)""Oobleck""Pop-Up 3D words and messages !""The Huffin' Hoopster""The Improved CD Hovercraft."Physics : Electricity & Electrostatics :"Build an Electrostatics Motor""Jacob's Ladder Sculpture from found materials""Kelvin's Thunderstorm : Create lightning from water""Paper Resistor"Physics : Instruments & Measures :"Be a Scientist : Make your own force-meter.""Be a Scientist : Make your own thermometer"Physics : Magnetism :"A simple mechanical resonance demonstrator""Diamagnetic Levitation Experiment"Physics : Optics :"Naff Movie into _DVD-Spectra_""Optical Water-Prism"Physics : Sound :"How to measure the speed of sound ...""Mechanica Wave Driver for Chladni Plate"

Ok, so I have another idea that will most likely never get anywhere due to my lack of funds/it not being possible.           What if I made a magnetic track somewhat like a maglev and had a robotic pegasus with electromagnets in its feet. It would also be an ornithopter to get it farther than a few inches off the ground. I would have the magnetic track to have it hover a few inches off the ground for about a minute before and after takeoff to make it less likely to crash on landing and give a minute to text the mayor to not worry about any upcoming pegasus sightings above or around town before taking off.           What kind of horsepower engine would I need to power the wings enough to get sufficient lift (at least 15-20 feet)? And would the electromagnet buffer before landing be significant enough to at least lessen the impact so it doesn't maim/kill you if you crash?           The electromagnets don't seem to me like they would work, but it would still be fun just to hover it to show it off without flying up 20-30 feet and worry about falling. Also, would it make it too heavy to fly if I put in an extra motor to make it walk/run so it doesn't have to be flying to move? I don't really expect this to be within my budget, but it would still be cool.

(a few tiny ideas) Basically a toy chainsaw that can cut through paper. Using hobby-R/C-like parts such as those tiny light motors would be a start. Reduced size, like a cellphone at most, mountable on a figurine soldier would be great. The miniature mortar should throw marbles on "mortar trajectories", you should be able to set the angle of the launch and (optionally) somehow the speed, though this wouldn't be necessary if the angle part is done well and the power is relatively constant at all shots. For ease it should be built only for angles above 45 degrees and the angle slider (or whatever the solution) should have marks (ticks) such that a user can remember and even create tables if he so wishes, in his war against coffee cups. Simplest solutions of "powering" would be rubber bands or coils from broken toys. A ping pong blower would be a tiny but strong fan (brushless outrunner motor) that keeps a ping pong ball "levitating" in mid-air straight up, but most excitingly even blown under an angle too. This wouldn't be a problem (physics takes care of it alone) just that the mount of the fan (ducted or not) should be operated and tilted as needed. This "levitron" would be a nice display on the desk running as long there's juice in the battery or else. Sorry if I'm not posting in the right place, these are just some ideas i'd love to build but i'm too clumsy and lazy :( Though my source of inspiration is the variety of USB gadgets commercially available, i'd like these to be more "free" and simpler if possible.

I have found schematics and code for a basic implementation of the QI standard using some Atmel processor.Also tons of circuits for "wirless charging" or "wireless power transfer".The ones with QI specs are way too much for m needs, the later leave some features to be desired.What I would like to be able to accomplish:Have a wireless power transmission working at a max of 10W and at a distance of 5-10cm.Most likely the power requirements will by in the 12V range with around 500mA on the receiver side.The features I would like to get without using a microprocessor:1. Basic and limited frequency tracking.As alignment is not always 100% the resulting differences for the near resonant frequency should be compensated by the circuit.2. The transmitting coil shall only be driven at the power levels required by the receiver.3. A bit like QI, the transmitter shall be able to detect that a receiver is present and fire up.No fancy safety features for foreign object detection required, no complicate hand shake with coded bits and bytes either.Pretty much simple bang-bang with some PID control on a wireless base.I am sure there must be a suitable circuit or even IC for thejob somewhere but I struggle to find something minimalistic enough.Oh, in case you wonder why I would like this to work:I am planning on building a rig for my camera to create some fancy night time videos.For this I would love to have the cam in an airtight housing with a sort of docking station - wireless.And for another project I need some wireless power transmission to make a levitating moon glow without batteries and cables ;)