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Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
Better question ... why bother CGI'ing something like this?
To actually do it you would need a control circuit inside the balls to counteract the magnetic field somehow when it gets to a given strength ... otherwise because of squared laws it's just going to fly up and hit the magnet. Would winding a coil around an iron core and switching it in series with a capacitor work to create an out of phase magnetic field and let gravity take over again?
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
That's not a very interesting discussion though ... it's CGI, but is it theoretically possible?
Use an AC electromagnet. Use a powdered iron core with a coil wound on it and at a given induced voltage temporarily put a capacitor in parallel to the coil ... as far as I can see this should decrease the attraction to the electromagnet.
Registered Member #5258
Joined: Sun Jun 10 2012, 10:15PM
Location: Missouri - USA
Posts: 119
+1 Vote for fake.
Look at the board she pulls out of the ball. Why would you put a connector on a board to connect to something on the same board especially when the "thing" needs to fly. The connector isn't used for the little "screw electromagnet" that's soldered directly to the board. And a programing header would not have something plugged in like that.
Also magnetic field strength is inversely proportional to the square of the distance between the two objects. If the device in the ball can be lifted an inch away by a the electromagnet, it would take nine times the tesla to lift the ball at a distance of three inches (3^2). Those big junk yard magnets would suck up massive current to be able to lift an object that far away (made for holding, not pulling from long distances) which could not be supplied by the dinky cables they have running up to it.
And it looks like the CGI gurus forgot the ball shadows.
Registered Member #4034
Joined: Thu Jul 28 2011, 10:41PM
Location: somewhere in the Southern hemisphere
Posts: 138
Hmm i had my suspicions, yeah does look like CGI now that you point it out. But that still raises the question; Is it possible? Id be keen to try to scale something like this down. But any ideas as to how to do it? The physics behind making something more attracted further away for a field than up close?
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So I found this on the internet... Hundreds of levitating balls!
