Windmetter or so called anemometer measures wind speed up to 17 meters/s. Wind speed is measured and logged over period of 1/12 of a year and is stored for 11 months. Log can be read any time by connecting a computer to station.
Anemometer is self powered from solar panel, which provides enough energy to run AVR ATmega88 controller circuit. Solar panel charges battery, which can provide enough energy for 50 days. Program is written in C language and can be compiled with WinAVR tools. Project it self is very well documented with lots of illustrations and detail explanation. It is really great thing for those who are construction their own weather stations.