Well, Stevez, I like that organized thinking and I need it for this project.
I started by getting some idea about my detector, the LED.
I could light one up at about 1.5V @ 1 or 2 mA. That means about 3 milliwatt of power.
And leaving impedance concerns aside for the moment (even though they are important) the question is now what is the minimum area and windspeed to power this LED.
The problem I can see is that the generator, a powerful little magnet and a coil for example, will only have a limited rate of change of the magnetic field (sort of your rpm) and therefore I must optimize the coil to make the most of the little power I will get.
This is mostly the point I was hoping for some experienced insight from this forum.
Uwe