How to Grow Bioluminescent Algae at Home. DIY Solar Lamp: Make Your Own Eco-Friendly Sun Jars. The principle is simple and seductively clever: solar lights that store energy during the day and release light at night.
These can be purchased ready-made in a variety of colors (yellow, blue and red) but they can also be built at home. A simple, less-technical approach involves buying a conventional solar-powered yard lamp and then essentially harvesting it for key pieces to put in a jar. This is simply a way of taking an existing solar lamp design and appropriating its parts to make something more attractive for display around a house or home. A more electronically-savvy individual can take the more complex route and built a solar lamp from the ground up using small solar panels – though the aesthetic result may not be as impressive. DIY. DIY Electronics. How To Do Just About Everything! HOMEMADE OUTDOOR GEAR.
Solar Energy Systems Design Tools. Welcome to Off The Grid. Wind Power Generators. Annual Output (KWH/year) = 0.01328 (D^2) (V^3) source...
Where D^2 is the blade diameter in feet squared, and V^3 is the wind velocity cubed in mph -- this is the year round average wind speed -- see wind maps below. So, a 10 ft diameter wind turbine in 12 mph average winds might produce about (0.01328)(10^2)(12^3) = 2300 KWH/year Note that the energy produced is proportional to the cube of wind speed -- having enough average wind speed is everything in wind turbines.
Use the wind maps discussed below and a wind survey of your site to determine if a wind turbine will actually payoff. The graph is of the wind energy equation shown above for various wind speeds and turbine blade diameters.