On one end of the pot, a regulated reference voltage is applied (like +5VDC). The other end is ground. The direction can be monitored at the center tap by monitoring the voltage. Below are the signal names and color codes of the wires...
yellow reference voltage
green wind direction
red ground
black wind speed
Anemometer, Standard
To display wind direction and wind speed, add our precision-crafted Anemometer. Includes both wind speed and wind direction sensors. Rugged components stand up to hurricane-force winds, yet are sensitive to the lightest breeze. Vane is hand-balanced for optimal stability and accuracy. Sealed stainless steel ball bearings for long life. Comes complete with 40' (12 m) standard cable and the hardware needed to mount it on a pipe, wooden post, antenna mast, or similar structure.
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