World's Tiniest Thermal Sensor Powered by Radio Waves
Researchers at Eindhoven University of Technology (TU/e) have developed a tiny, wireless temperature sensor which is powered by the radio waves that are part of the device's own network. All it needs is energy from a nearby router -- once there's enough, it powers up and starts working. This means that the sensor needs not even a single wire, nor a battery that would have to be replaced. The arrival of such sensors is an important development on route towards smart buildings, for instance. But the applications are many and various.