By Siti Nurrohmah
Energy consumption
increases with the increase in population, resulted in the State Electricity Company (PLN) which had to work
harder to fulfill the demand of electrical
energy. During the time, many sources
of electrical energy obtained from the conversion of fossil energy such as
petroleum, coal, and gas. Global situation indicates that fossil energy (especially petroleum) increasingly depleted because it is non-renewable. It is
affected on its price that is also
rising.
The newest concept for
the fulfillment of electrical energy in a circuit is the energy harvesting of scavenging energy. Energy scavenging has several advantages such as cheap,
safe, maintenance free, flexible, and can be used in various occasions. There are several sources of energy in our environment that can be used and they are renewable, for example energy from temperature changes, solar energy, energy of vibration, etc.
