Harness the power of the wind and measure speed with this simple anemometer!
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An anemometer measures wind speed. The wind moves the cups on the anemometer, which rotates an enclosed magnet. The magnet closes a reed switch on each rotation, which is reflected on the output. You can measure this on the two inner conductors of the RJ11 connector (pins 2 and 3), using a digital counter or interrupt pins on your microcontroller. To convert this into a functional wind speed, use the conversion of 1.492 mph = 1 switch closure/second. For those in metric land, this is 2.4 km/h.
This is the same anemometer that is used with the Weather Meter Kit.
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