Energy harvesting

electrical device that converts the energy of light directly into electricity by the photovoltaic effect

thumb|upright=1.1|Piezoelectric balance presented by Pierre Curie to [[Lord Kelvin, Hunterian Museum, Glasgow]]

device which converts heat flux into electricity

process by which wireless autonomous devices capture and store small amounts of energy from the environment

A windpump is a wind-driven device which is used for pumping water. thumb|right|The windmills at Kinderdijk in the village of [[Kinderdijk, Netherlands is a UNESCO World Heritage Site]] thumb|De Olifant, Burdaard|De Olifant at [[Burdaard, Friesland]] thumb|right|Tjasker in Hayward, California Windpumps were used to pump water since at least the 9th century in what is now Afghanistan, Iran and Pakistan. The use of windpumps became widespread across the Muslim world and later spread to China and India. Windpumps were later used extensively in Europe, particularly in the Netherlands and the East

thumb|right|Indoor light converter for solar energy harvesting thumb|right|Ultra-low power DC/DC converter for thermoelectric energy harvesting The EnOcean technology is an energy harvesting wireless technology used primarily in building automation systems, but also in other application fields such as industry, transportation, and logistics. The energy harvesting wireless modules are manufactured and marketed by the company EnOcean, headquartered in Oberhaching near Munich. The modules combine micro energy converters with ultra low power electronics and wireless communications and enable batte

Mechanical timekeeping device that is driven by a spring that winds by motion of the wearer

utilisation of the thermal energy contained in the wastewater

type of watch movement with analog display, wherein the energy for a quartz movement is gained by other sources than the conventional battery, typically from the wearer's movements