Make wind turbine from DC motor Tread mill Wind generator DIY project
When you make your own wind turbine generator from a DC motor or tread mill motor make very sure that you install the diode in the correct direction not only for the blade spin rotation but also so the motor does not spin. If the diode is correctly installed then power can ONLY go into the battery and not be used to spin the motor. This is the key for turning a DC motor into a generator.
See Thermodyne Systems at