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Brian developed a 3d printable DIY PMG generator ideal for producing electricity from small wind turbine.You will need some disc magnets and copper wire, but you will get a functioning generator. It can produce up to 50 watts at high RPMs.
Here is the generator being assembled and tested:
Here are four generators mounted on a modular multi-blade wind turbine in a strong wind:
The files and manual are not free, but come at reasonable 35 USD:
http://www.energy-creator.com/3D-generator-1.php
There are several other non-printable DIY generators on that page so it's a good resource for anyone interested in home-made wind power.
If you are looking for larger DIY generator of the same type for bigger diameter wind turbines, there is a complete manual in PDF format that can be found at:
https://www.scoraigwind.com/pmgbooklet/itpmg.pdf (remember to click the captcha that you are not a robot).
It gives out much more power, but you will need some heavier woodworking, bigger magnets, resin and longer blades and higher tower.
