how to wind coils to generator?

i am willing to make home made generator what is best shape and way wind the copper coil

The simplest way to make one is a so-called axial flux machine. Look for "Hugh Pigott" and Scoraig windpower. At one point his site had a brief paper on making one, including winding details.

Of course, for efficiency, you can't beat radial flux machines, but they are harder to build.

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