In the recent years, besides the fossil fuels dimming, the
constant development of new technologies and the constant
need for electrical energy supply are propelling the research
for new and more efficient ways to harvest energy from
different ambient sources. Some of the answers to this need
are the renewable energies sources such as Photovoltaic
Panels (PV), ThermoElectric Generator (TEG) and wind
generators among others. These technologies are under
constant update and one branch particularly aims to recover
some energy at more little scale, which is called Energy
Harvesting.