How to make a micro wind turbine

It is easier to use a commercially available motor. How did your teacher test it, whether to use natural wind or a fan to start the generator? It's hard to tell when it comes to natural wind. The wind must be strong enough to start the generator. The stronger the wind, the faster the engine runs and the more electricity it generates. The same goes for motors and blades. But the proportions need to be right, not a big engine with a little maple leaf. The blades can be those of a fan, and the motor must have magnets. Experiment slowly. When the wind speed and the bulb remain unchanged, the brighter the light, the higher the voltage.