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A comment on With a simple piece of paper, engineers create self-powered, wireless keyboard. Parent comment

Re:With a simple piece of paper, engineers create self-power... by jrockway on Sunday September 06, 2020 @07:41PM (#24395559)
That exists... sort of: https://www.philips-hue.com/en-us/p/hue-tap-switch/046677473...
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