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World's smallest battery-free flying robot uses magnets for power. (interestingengineering.com)

submitted 3 months ago by [email protected] to c/[email protected]

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[–] [email protected] 3 points 3 months ago* (last edited 3 months ago) (3 children)

It almost looks like one of those toy helicopters that you launch by just lifting it up a coiled rod so it spins really fast.

[–] [email protected] 2 points 3 months ago (2 children)

Yeah, I wonder how far they can extend the magnetic fields that power them? Even if it is relatively short range, they look really cheap to make, so you could have thousands of them with sensors to scan localized areas.

[–] [email protected] 1 points 3 months ago

Don't give them ideas...

[–] [email protected] 1 points 3 months ago

If they make one that moves with radio waves, it would be really great.