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Only You Can Lift This DIY Hammer Of Thor

• popsci.com

In comic books and blockbusters, only the worthy can lift Thor's hammer. But you don't have to be a hero to wield Allen Pan's version of Mjolnir. While watching last year's Avengers: Age of Ultron, the freelance engineer noticed "a flippant remark about the handle being 'imprinted,'" Pan says. The idea that fingerprints could unlock the hammer inspired him.

"I thought about how someone might go about replicating that function, and there it was," he says. All he needed was an electromagnet—which can be turned on and off by electrical current—and a fingerprint scanner. Pan wired together the electromagnet and scanner, and placed them inside an off-the- shelf toy Mjolnir. When switched on, his hammer becomes magnetized and will stick fast to metal until the scanner recognizes his touch and releases the weapon.


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