Weather Station 3 Cup Anemometer / Wind Vane Sensor

3 Cup Anemometer Wind Vane ( 2″ Diameter Plastic Easter Eggs )

wind-direction-sensor Finished building the Arduino / ATtiny wireless weather station three(3) Cup Anemometer with a Wind Vane for wind direction above the anemometer. Except for the wind vane tail and the three cups, the sensor is completely built from PVC pipe fitting. The tail was cut from real thin aluminum flashing and supported on 1/8 inch aluminum rod. The anemometer cups, are the bottom half off 2 inch Easter egg supported on 1/8 inch aluminum rod.

The wind speed is counted by a reed switch, and wind direction is sensed by a no stop 360 degree 10K potentiometer. This build wasn’t as hard as the windmill style wind/direction sensor. The hardest part was drilling the cup locations 120 degree apart around the cup support. Positioning the reed switch was also tricky it also has to be adjusted just far enough away from the magnet to get one clean click. Now have two different style  wind (Anemometer)/direction (Wind vane) sensors which can be used with the ATtiny/Arduino wireless weather station

Part List:

  1. Three(3)  Large Easter eggs (2″ diameter)
  2. Six(6)  1/2″ PVC plugs
  3. Two(2)  1/2″ PVC sleeve
  4. One(1)  3/4″ PVC plug
  5. One(1)  1″ PVC threaded end cap
  6. Two(1)  1″ to 3/4″ PVC reducer
  7. One(1)  3/4″ sleeve
  8. One(1)  7/8″ 10K potentiometer
  9. One(1)  miniature reed switch
  10. One(1)  small magnet
  11. Three(3)  1/8″ 1′ aluminum rod
  12. One(1)  1/8″ 1′ copper tube
  13. Three(3)  6-32 nuts
  14. Three(3)  6-32 cap nuts
  15. Two(2)  bearing salvaged from old hard drive
  16. One(1)  copper tube inside diameter of bearing
  17. One(1)  copper tube outside diameter bearing copper tube
  18. Sheet real thin flashing for tail

3 Cup Anemometer Wind Vane ( 1 5/8″ Diameter Plastic Easter Eggs )

wind-direction-sensor Built another 3 Cup anemometer, wind vane with more readily available small 1 5/8″ diameter plastic Easter eggs.  Used only one(1) 1/8″ by 12″ aluminum rod for the wind vane, cut 3″ off for the front had 9″ left for the tail. The tail fin is 7 3/8″ high, 3″ wide in the center, the center is 3 1/2″ from the top, the top/bottom are 2 3/8″ wide, a 3″ slot was cut down the center of the tail rod to hold the tail fin. The counter weight about 1 1/8oz.

The wind speed is counted by a reed switch, and wind direction is sensed by a no stop 360 degree 10K potentiometer. This build wasn’t as hard as the windmill style wind/direction sensor. The hardest part was drilling the cup locations 120 degree apart around the cup support. Positioning the reed switch was also tricky it also has to be adjusted just far enough away from the magnet to get one clean click. Now have three different style wind (Anemometer)/direction (Wind vane) sensors which can be used with the ATtiny/Arduino wireless weather station

Part List:

  1. Three(3) small Easter eggs (1″ 5/8 diameter)
  2. Six(6) 1/2″ PVC plugs
  3. Two(2) 1/2″ PVC sleeve
  4. One(1) 1/2″ PVC End Cap
  5. Two(2) 1″ to 3/4″ PVC reduce
  6. One(1) 3/4″ sleeve
  7. One(1) 6″ 3/4″ PVC pipe
  8. One(1) 7/8″ 10K potentiometer
  9. One(1) miniature reed switch
  10. One(1) small magnet
  11. Three(3) 1/8″ 1′ aluminum rod
  12. One(1) 1/8″ 1′ copper tube
  13. Three(3) 6-32 nuts
  14. Three(3) 6-32 cap nuts
  15. Two(2) bearing salvaged from old hard drive
  16. One(1) copper tube inside diameter of bearing
  17. One(1) copper tube outside diameter bearing copper tube
  18. Sheet real thin flashing for tail
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