First Demonstration of a Surveillance Camera Powered by Ordinary Wi-Fi Broadcasts | MIT Technology Review
Jay Liew stashed this in Technology
Power is what's currently limiting the Internet of Things.
One of the most significant barriers to deploying sensors, cameras, and communicators is the question of power. The task of fitting a security camera on an external wall or a temperature sensor in an attic immediately runs into the question of how to run a power cable to the device or to arrange for batteries to be replaced on a regular basis.
Then there is the Internet of things, the idea that almost every object could be fitted with a chip that broadcasts data such as its location, whether it is full or empty or whether some other parameter such as temperature or pressure is dangerously high or low.
Great things are expected of the Internet of things but only if engineers can solve one potential show-stopper of a question: how to power these numerous tiny machines.