I love stuff like this! If you have a shed or greenhouse, where you could use a small amount of power to run maybe a radio, small light or fan, then this project can bring you free power for the price of a few inexpensive set up costs. You can even use it to charge a battery, which can then power an inverter, so you get ac power, which you can use to charge mobile phones etc.
There are hundreds of videos like this on youtube, showing you how to get power, heat, cool, water etc etc in all kinds of easy make yourself ways. Once I get browsing on youtube I am there for hours. Take a look for yourself and see what I mean. If you have any projects of your own that you would like to share please contact me from this website and we can maybe put it out there in a post.
In the meantime, take a look at this home made wind turbine. I’m going to make one for my tool shed to keep the radio going. I will let you know how it goes.