Vertical axis wind powered generator resources post. VAWT have a lot of upsides compared with classic wind generators and are increasing in popularity among homeowners.
If you are finding your loft water tank overflowing quite frequently and difficult to monitor, then perhaps its time you attached this simple home made water level indicator to your water tank. Learn the entire building procedure here in Bright Hub. Circuit diagram included.
Awesome water Level Indicator with ULN 2803 ~ Electrical Engineering World
How to do a solar site assessment to set up passive solar heating systems
Homemade Off The Grid Solar Hot Water Project Homesteading - The Homestead Survival .Com