There are already plenty of gadgets that allow people to charge their mobile devices while off the grid. Most of those products utilize solar power, while a few have gone the thermoelectric route. The ...

How to Make a Micro Hydro Generator at Home ...

Have you heard that if you install solar or hydro power on your home in Costa Rica, you can generate more than you need and sell the rest back to the grid? You heard wrong. With this year’s grid-tie ...