The lock-powered-by-key exists: http://www.cyberlock.com/access-control/cyberkey...

		yuubi on April 24, 2016 \| parent \| context \| favorite \| on: WISP: Battery-free computer that can be reprogramm... The lock-powered-by-key exists: http://www.cyberlock.com/access-control/cyberkey-smart-keys . The power and signaling go through metal contacts rather than wirelessly.