> I thought it would be interesting to have a windmill with an RPM
> detector on it.
>
> As I understand it, something as simple as an incandescent light bulb
> across the switch. When there is no light, close the switch. :)


But the light would light whether the windmill is going faster or slower
than the synchronous speed... So, I think an independent RPM measurement
is required.

Harold




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