I planning to add an anemometer to my small solar weather station. I designed this system to run from a single 3.7v rechargeable battery and a solar panel so I have to calculate in more power drain.
What I don't really understand is do these anemometers consume any external power or just give out a voltage by themselves?
This one doesn't even have consumption specified:
For this Supply voltage : 5V - 24VDC: