July 13th, 2010
There are many ways to produce free electricity, but one of the most inexpensive ways is to build a vertical axis wind turbine. In this post I will show you how to build a small-scale vertical axis wind turbine.
April 9th, 2010
Using just some cheap materials, this guy managed to create his own wind power generator. So, I invite you to watch these two videos and after that, I hope you will be able to build a similar system without spending too much money.
April 8th, 2009
All you want to know about solar cells.
