i have bought a dc motor 12 v. but the problem is that when i use the hair dryer to rotate the fan it only generated a max of 3 v!!! is there any ways to increase the output. i will give the schematic of a simple wind generator in m next post.
and what is the price of a solar cell which one can use to charge 1.5v batteries.
You will only get usable energy with a biggish rotor. A 1M diameter windmill will generate around 100W. A ½M around 25W, ¼M around 6W. These are all in a good wind and with a well designed windmill.
alternators will require a bridge circuit and the output voltage will be high. i do have some hair dryer motors availible but i try to avoid ac power(specially 220v!!!)