Different designs

Horizontal axis

Vertical axis

DIY wind turbines

Examples and designs

Vertical axis

http://www.instructables.com/id/Building-a-Vertical-Axis-Wind-Turbine-VAWT-/

Horizontal axis

1000 WATT WIND TURBINE

http://www.instructables.com/id/DIY-1000-watt-wind-turbine/

We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It’s a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary.

HOW I BUILT AN ELECTRICITY PRODUCING WIND TURBINE

http://www.instructables.com/id/How-I-built-an-electricity-producing-wind-turbine/

How easy they are to build

Commercial products

Eco-friendly wind turbine flaps it’s giant wings like a bird

http://thegreentimes.co.za/eco-friendly-wind-turbine-flaps-its-giant-wings-like-a-bird/