Homemade Wind Turbine

Wind Turbine
Wind Turbine
It’s not finished yet so here are some images of what I have done so far. When I am finished, I will do a much better write up of how I made everything.
The goal is to be able to get 100-200 Watts of power to charge my 12v battery bank in my camper when I am camping off the grid. I could use a generator but what fun is that?
Solar is an option however it is very expensive for even small panels.

The generator is a 90 Volt 1750rpm DC Motor I found laying around.

This is a flywheel off the same motor. I drilled holes to mount the blades.

The blades are made out of 6″ PVC pipe. I won’t go into detail yet but here is the site where I got the blade info from. http://www.mdpub.com/Wind_Turbine/index.html This guy has a really nice site and I am following his plans fairly closely.
Update 01-10-09
Here are some more pics. I have not tested it yet but the temperorary stand is built and the wind vane on the back is done. It’s all ready to go.

I used a 1″ pipe inside a 1-1/4″ pipe for the thrust bearing for now.

Aluminum tent pole for the tail support. I drilled the wood block so it would fit.

Plywood for the tail.
Update 01-13-09 New Video

First test video
Update 01-21-09

I moved it out away from the trees and buildings. It performed much better
and I was able to get 15-20 volts from a 10mph wind. The blades were spinning
at about 200 rpm for 15v and about 250 rpm for 20 volts. I did not see the
voltage drop below 15v the whole evening. I even added some christmas lights.

Christmas lights powered by the wind
Powered by wind only. Now I need to get building the charge controller.

New video
Update 03-30-09 Charge Controller

Display shows battery voltage and charging status

The 40 Amp diode requires a huge heat sink (just in case)

Terminal Connection. It will handle a 20amp Wind Turbine and a 6amp Solar Panel.

Inside the controller.

Here is the control circuit. Two op amps and two NOR Gates.

I got the circuit design from here. It works perfect and I added a voltage readout.
I used two single op amp chips since thats what I had laying around.

Bottom view. What a mess……

I used a cheap $10 LED readout off Ebay for the voltage screen. It arrived
already calibrated for the correct voltage. I had to supply 5v to power it so
I used a common 7805 regulator.
That’s it for now.


  1. if your turbine doesn’t spin on top of the tower, then there is no need for the tail. if it is stationary and directed it will only receive wind from the front and back. you may want to make it spin and to turn into the wind to gain wind power from all directions, also how much would you charge to build me a simply charge controller for my wind turbine? just asking.

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