Instructables

Electromagnetic Floater

FeaturedContest Winner
Picture of Electromagnetic Floater
Object2.JPG
Object3.JPG
Electromagnetic Floater.bmp
This Instructable will show you how to make a device that can float almost any object with a magnet in it.

It is much like the floating globes you can buy, except it works by balancing the forces of permanent magnets with electromagnets, rather then simply using combinations of permanent magnets.
This is done by using a microcontroller and an IR sensor to detect where an object is floating below. Then based on a set value, the microcontroller uses the electromagnets to to hold the floating object at a given height.

The place the object floats at depends on the weight of the object and the power of the magnets in the object. The height is set by holding the object under the magnets and sensor and pushing the button.
The object floats at the point where the force of gravity down equals the force of the magnets pulling up, which allows it to use non-industrial electromagnets and less power to float. The program also dynamically adjusts so the object is always at the perfect height.

I decided to make the electromagnetic floater because I have always been fascinated by the floating globes in the store, but I never wanted to pay their prices, and I never liked how they only floated objects that you had to buy or came with it. So, I decided to make my own that could float anything with a magnet. The results are what you see here.
 
Remove these adsRemove these ads by Signing Up
Succorbenoth3 months ago

Where did you get your program from?

0505STAZ1 year ago
Could you get the items part numbers? I am trying to make it and it is hard to find it without it.
nerd121 year ago
would it be possible to make this into a hand held version by reversing the magnets to it is being pushed up rather than pulled up? this could be made into a glove similar to an iron man repusler. it will have to be a powerful electromagnet, but is would be Definitely worth it! the effects are ENDLESS! Magneto! Hadoken! Deathstar! dragonball!(have not been a fan of the last two, so no clue :P )
what do you think?
Super_Nerd2 years ago
This would look cool levitating ferro-fluid.
I totally agree. Although you'd need a permanent magnet for the ferrofluid to glom around, since it can only hover things that are already magnetic. Or invent a type of ferrofluid that naturally has its own field.
Use it as a thermometer or something; have the hover height depend on the temperature.
wow
Dantex1 year ago
So if I got this correctly - the circuit uses the feedback of IR led-s to regulate the current going trough the coil to keep the downward force constant

but then why 2 electromagnets?
can you label the pins on your H-bridge symbol (never seen that symbol, so I don't know what pins do what)? what do 2 Leveling Capacitors do? it is a bit complicated to understand
I would like to make my own but it isn't very straight forward
scci Dantex1 year ago
he used an unsusal sybol but i found it on this page

http://www.adafruit.com/datasheets/l293d.pdf
took me 3 months of looking be happy :)
Dantex scci1 year ago
Thank you very much!!
Bertmci1 year ago
Hi every one i would like to know how many turns should be used on the electromagnets and also what size wire
Bertmci
This is a great project! I'm hoping to recreate this with a more powerful setup since I'm hoping to levitate a slightly heavier object. However, in looking at a bunch of EM levitators, I see people either use a hall effect sensor or an optical setup like your to sense position of the object. This one seems much simpler than having to measure the magnetic field with the hall sensor, are there any drawbacks from it? What are the benefits of using the hall sensor instead?

connormarve2 years ago
Can anybody tell me how exactly to assemble the electronics, as the tutorial is to advanced for my primordial brain.
penghars3 years ago
How about if you changed the microcontroller and LED and thar stuff with a potensiometer.... Could it still work??

you can try to use negative feedback opamp and some analog circuit design to achieve the same thing. i believed.
bears0 penghars2 years ago
no it needs to compensate for height. if the object being levitated is too high it turns off the magnet and vice versa. with a potentiometer it wont be able to automatically adjust. also it would be impossible for someone to to control it because they couldn't react to the changes fast enough.
1dog7892 years ago
what is the zipped file?
JGsoldier2 years ago
where would you get all of the materials?
CMNDR2 years ago
Anybody ever figure out how or where he got his coil, or the specs of the coil so I can make something similar?
It reminds me of the look of some coils i grabbed from the driver coils from a floppy drive motor.. Wortha look anyway and off memory there is 6 in one drive :)
Those look really big to be located in a floppy drive. I could see one maybe but not six.
CMNDR2 years ago
Exactly how many transistors or voltage regulators are you using? Your schematic calls for one but I see two in this picture. Also on later picture I see another two are located underneath the board itself. What are these used for or are they the ones that were located on the top but have been moved under the board.
macnomad842 years ago
I dropped a floater in my toilet this morning... Now i have to build another one.
Can I use an Arduino?
amruth2 years ago
can i know what type and gauge of wire u used for the electromagnet.
tledgerwood2 years ago
saw the name and couldn't stop laughing, imagining a magnetic poo and its uses
wonder if you could beef it up and make floating furniture
And then sit in it. That would be awesome. Or a floating bed-sized ferofulid ball that you could sleep on.
it would suck if it stopped working when you were sleeping SMACK!
i think the ferofluid would be a bad idea the second you lay on it you would fall through and be soaked in it. not to mention you might drown.
Fill a waterbed with it?
that would probably work better but theres no telling what shape it would be or if it would float at all
It would spike you though
make it weak then
It would just be a regular water bed then
no, it'd be a really badass waterbed
It be a really badass floating water bed. PWNT fools.
It would be a watery blob,if it was in a skin of some kind it would be a cool bean bag chair
and if your pants were magnetic... now we're getting somewhere! haha
Owww, ultra wedgy
Pro

Get More Out of Instructables

Already have an Account?

close

PDF Downloads
As a Pro member, you will gain access to download any Instructable in the PDF format. You also have the ability to customize your PDF download.

Upgrade to Pro today!