Renewable Energy for Products
Trevor Bayliss invented the wind up radio as an answer to the need to communicate information about AIDS to the people of Africa.
There is no need for batteries or any external electrical source, the radio is actually powered by the user winding a crank for several seconds.
In a wind-up radio, this electricity is converted from the mechanical energy of a winding mechanism, which is basically a very small electric generator.
The clockwork mechanism meant that a spring could be wound up and that as the spring unwound the radio would play.
After inventing the wind-up radio, Trevor Baylis went on to produce wind-up torch, mobile phone charger and MP3 player – and a shoe that generates enough electricity as you walk to charge a mobile phone.
Photovoltaic Solar Energy
Solar cells, also called photovoltaic (PV) cells, convert sunlight directly into electricity. PV gets its name from the process of converting light (photons) to electricity (voltage), which is called the PV effect.
Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. Solar panels actually comprise many, smaller units called photovoltaic cells. (Photovoltaic simply means they convert sunlight into electricity.)