Big Blade Wind Horn

Project Number: 55

Description: Place the water wheel on the motor (M4) and mount it on the pivot. Connect the red and black jumper wires to the circuit as shown. Set the meter to the 5V setting. Hold the "water-windmill" in a strong, steady wind (such as near an electric fan), and adjust its position on the pivot to get the highest voltage on the meter. If the wind is strong enough, the horn will sound. Blocking one side of the fan with your hand may direct the air flow better and will make the fan work better.

Snappy: The water wheel was made to use with water, but wind can push it too.