09-26-2018, 09:14 AM
(09-25-2018, 04:46 PM)morzh Wrote: I thought it is a motor, but was wondering how fast the reaction would be: it needs to be very fast.
They can be very fast. All of the gasoline powered inverter generators that I have worked on use the same sort of system for engine speed control, and that has to be at least as fast as this indicator.