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.

Step 1: Materials

- ATMega168 Microcontroller
- 1 16-20 MHz Crystal
- 28 Pin Socket
- Dual Full H Bridge IC
- 1 Power NPN
- 2 Electromagnets
- 1 Bicolour LED
- 2 IR LED
- 1 IR Photodiode
- 1 5V Regulator
- 2 Leveling Capacitors
- 1 SPST Switch
- 1 NO Button
- 1, 470 Ohm Resistor
- 1, 5 Ohm Resistor
- 1 Universal Breadboard
- 2 Cases
- Plexiglas
- Solder
- Hot Glue
- Steel Wire
- Vinyl Tubing
- 3 or more 1/4" diameter x 1/4" thick rare earth magnets (for the base)
- 2 or more 1/2" diameter x 1/8" thick rare earth magnets (for the objects)

- Soldering Iron
- Hot Glue Gun
- Desoldering Pump
- 3rd Hand
- Plexiglas cutter
<p>Hi, it's been a real challenge!. I finally used IR leds, more stable. Do you know about any other interesting projects involving hall sensors?</p><p>Regards, </p>
<p>Here is a short video:</p><p>https://youtu.be/RqrPMbACC7s</p>
<p>Where did you put your permanent magnet???</p>
<p>Is it necessary to put Arduino?</p>
<p>I have one of these devices -- a levitating globe. It's driving me bonkers because when the globe is suspended, I can hear a persistent noise. When it isn't (just glued to either the upper or lower magnets), the sound stops. What can I do to fix this? I find the noise very distracting, but nobody else can perceive it (I can hear significantly higher pitches than the average person which is why I think I'm picking it up).</p>
You should try adding a smoothing capacitor. The AC can generate a frequency through the electromagnets
Sorry what I ment to say is the transformer might make a frequency in the circuit
<p>I want to ask, what type of full H bridge IC that you use there?</p>
<p>I didn't Make it this way, but i made one. I have an instructable coming out soon on it.</p>
<p>See it here https://www.instructables.com/id/Magnetic-Levitation/</p>
<p>I didn't Make it this way, but i made one. I have an instructable coming out soon on it.</p>
Do you have to set the location of the floating object with the button? Or can you test it find the point where it floats then turn off the current flowing to the magnets and let it drop. Then when turning the current back on, will the object return to the position that you initially tested??
<p>Also, where is the arduino file you mentioned??</p>
<p>Hey, I am looking at your project and hoping to build one. I just wondered about the wire coils, how many times were they wound around the magnetic core??? Please reply ASAP, I'm fast encroaching a deadline and need all the pointers I can get. Thankies!! </p>
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 ) <br>what do you think?
You will need copper which repels
<p>Is the NO Button a push button or a switch?</p>
no button would be a normally open button
<p>Ttat is magic ! I don`t know why him can control the power. Who can help me ,I want to do such things.</p>
<p>Hey dude I'm having a hard time understanding the power inputs, I haven't worked from electrical schematics before and the H bridge I ordered is not like yours, any chance I could get your email and I could rack your brains? Cheers James</p>
Awesome ible...
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!
<p>&quot;Hey, what happened to the power...&quot; *BOOM* &quot;Whups, grandpa's up&quot;</p>
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
they actually do have floating beds but they are expensive<br>
send me a link i'd like 2 luk at it <br>
<p>I need to check this out at home</p>
DANG! <br>
holy crap thats cool<br>
<p>I wonder if you could coat a gemstone with molten iron on one end and float it.</p><p>Or if you could float liquid iron itself, since the process of making permanent magnets does involve melting the metal.</p>
<p>do all of the parts create the micro controller or do you need both</p>
<p>Where did you get your program from?</p>
Could you get the items part numbers? I am trying to make it and it is hard to find it without it.
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.

About This Instructable




Bio: Currently doing masters in Mechatronics Engineering, but still create in my spare time
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