How to make a Small Wind Turbine 4
To test with a voltmeter simply connect to the voltmeter leads to the two wires coming
from the cooling fan, set the voltmeter to 12 volts AC. Get a hairdryer and get the blowing air to spin the fan blade of the cooling fan. If everything is working correctly you should get a reading of between 4 – 6 volts.
To test with an LED simply attach the two wires from the cooling fan to the terminals of the LED. You may need to loosely solder these for a good connection, you can De-solder them once finished. Again you need to get a hairdryer. If the LED does not light change the polarity of the wires – swap the wires coming from the cooling fan generator the opposite way around with the LED wires (LEDs only work if electricity is flowing from the right direction, otherwise they will not work).
Once we have all of that done its time to assemble the vertical shaft that everything rests upon, this also needs to be capable of rotation to allow the turbine to face into the oncoming breeze, otherwise the turbine is only working when wind is blowing from one direction, which is very rare.
For the vertical shaft i used an old bicycle pump which no longer fits my new bicycle wheels. This is ideal as it allows the rotation of the vertical axis and therefore it also allows rotation of the horizontal axis upon which the fan and generator assembly will rest.
You can see the pump here, it costs under 10 dollars and is ideal for the job as it is strong and light –
After removing some of the non essential parts this is how we want it to attach to our generator assembly so it can rotate with the wind –
Drill a hole in the top of the pump where the handle used to be, just big enough to fit cable tie/tie wrap through –
Then attach it to your generator assembly loosely but tight enough to hold it in place, we will need to move the position of the cable tie later on.
So far so good –