Energy harvesting is a process by which wireless and autonomous devices are able to capture, convert and store energy from external environmental sources like light, heat or motion. Ideally, these devices can be powered partially or completely by harvested energy, so that batteries and the power grid become redundant. The idea of energy harvesting is […]

When we talk about the power supply for mobile devices, we instantly think of batteries. But since the beginning of the 20th century, researchers and engineers try to use the human body as a renewable source of electrical energy. Since the 1940s, hand crank-powered radio transmitters were used to compensate for shortcomings in energy availability. […]