Wind turbine Savonious Charger based on Joule Thief - advise for a charger?

@Allanhurst

The project consists in:

a) Photovoltaic charger - see separate thread - completed
b) Wind turbine charger - this thread - ongoing
c) Lighting system - simplified version so far - no thread foreseen
d) Control system - under preparation by providing control points in each of the components above (a, b,c). - no thread by now.

The d) - control system - is where the Arduinos come in.

Step by step :-))

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[OT maybe: I love to understand what I am doing, even in the simpliest cases. See the Joule thief circuit- everywhere is given as a "simple thing to make". Yes, but is not as simple to understand. I hate "monkey see monkey do" :-)))]