1. First I looked for the two main parts: the propeller ( in my case it was a old fan blade ) and a permanent magnet motor. I have tried to use motors that werent permanent magnet and I got bad results.
2. Then you need a long piece of pvc pipe (I used 1/2 inch) but the diameter of the pvc pipe really depends on the diameter of the shaft you are going to use
3. the rest of the parts I found laying around like all of the metal and the plastic for the fin
4. You will also need a hot glue gun
Step 1: The Motor
A simple test to find out if your motor is good enough for a wind turbine:
1. Get your motor and if you have access to a shop vise place it in there VERY LOOSELY as not to damage it ( or you can just hold it in your hand )
2. connect your multimeter to the terminals on the motor and set the multimeter to a low DC voltage setting
3. with the multimeter still connetced, spin the motors shaft with your fingers as fast as you can and if the reading is more than or at least 3-4 volts...you have a good motor for this project
Step 2: The Fin
Step 3: The Fan Blade
Step 4: Putting It All Together
Hopefully you will get good results too.
Step 5: My Experimental Turbine
needs so I made a really good one shown in this instructable. The pictures on this step are of one of my first ones.