Capture the wind

How could you design and construct a windmill connected to a rotation sensor to measure the speed of the wind?

capturing the wind nxt front view   capturing the wind rcx

Tip 1: Even though they can be used as rotation sensors, the NXT motor and the EV3 large motor will not work as well as an RCX Rotation Sensor for this task because of the friction in their mechanisms.

Tip 2: Whether or not you have an RCX rotation sensor, can you think of a way that another sensor could be used to measure rotations? (Big hint: Think Light Sensor!)

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