I made the reprap windturbine from plans I bought online. The project was a great build, fun to assemble, and a good problem solving excersize, since nothing ever goes exactly the way it was intended. For instance, I split some of the parts to fit themost on the printrun bed, and the center axis power transfer tube, I built, but skipped past because it was not necessary, causing problems, and the wind was not going to spin the turbine in circles. It is very good design with closely fitting parts. For example, the magnets fit by pressure in the sleeves. No glue needed. Some hard parts were the metal rings forming a base, I guess?, for the magnets. I enjoyed winding the copper coils. I did that by hand even though the plans have a winding tool includes. I had to wind the coils twice because I reversed the direction of them and the coils must all face the same way. The space in fixed between the two plates and the coils is important because I assume the close the plates, the better the power generation. I will continue in a reply message because I do not want to lose what I wrote.

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The plates spacing is separated by tabs on the magnet carriage. I wanted to adjust the gap, so I removed the tabs on the file and used plastic spacers from the hardware store and washers to adjust the width. It is spinning here with the afternoon wind and generates around 4.5 volts and up to 12-15 in heavy wind.

nice! is it connected to battery bank?

Yea, I bought a lead acid 12 volt battery yesterday.