Here's cobrakiller2000's homemade Levitron-style magnetic top. He says:
The only non-electric way that I know off to get a magnet fully levitating over a magnet and with nice elevation too. Looks way cool and is just overall a beautiful invention in my opinion. Was hard to pull this off. I struggled for weeks before I got it levitating - very delicate system. Yes, gyroscopic forces keep it from tipping over and therefore keeps it in repelling mode as long the rpm are high enough.
A team at MIT’s Department of Mechanical Engineering and Department of Civil and Environmental Engineering have created a set of foldable, 3D printed robots that are doped with magnetic particles that are precisely aligned during printing; when triggered by a control-magnet they engage in precise movements: grabbing, jumping, rolling, squeezing, etc.
MIT researchers designed and 3D-printed an array of soft, mechanical critters that are controlled by waving a magnet over them. The shapeshifters that fold up, crawl, grab things, and snap together into intricate formations may someday lead to new kinds of biomedical devices. For example, one of the devices “can even be directed to wrap […]
The YouTube channel of Magnetic Games (“all the ways to have fun with magnets”) posted high-powered neodymium magnets with names like “The Death Magnet” and “Big Magnet” colliding with one another in high-FPS slo-mo footage. [via]
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