Easter Egg Anemometer (Wind Speed Meter)

Step 4 Video

Extras:

I glued an extra egg on the wood as a weather shield and put liquid electrical tape on all over the motor to seal it.


Below is a template for lining up a three-cup rotor.

Comments

[oldcolonial]

How was the unit callibrated?

[robbtoberfest]

Car window trick: stick the anemometer on a broomstick, stick it out the window while somebody drives various speeds down a back road; use a marker to make dashes at the 10 mph, 20 mph, etc.

[hac]

You could also calibrate by manually turning one of the cups and calculating the speed using the length of one of the screws (since the cup is traveling in a circular path of which the screws are radii). 

[hac]

 Of course I should note that this only measures the speed of the cup, which might be slower than the actual windspeed.

[codesuidae]

You could probably use some resistors (and maybe a potentiometer for fine tuning) to adjust the output of the motor to match the existing scale on the meter. Then you could use a digital meter instead of analog.

[maker12]

how bout a window comp circuit!