Elenco Green Projects - Manual (Page 20)

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Project #12 Wind Warning
Light Charger Project #13
Build the circuit as shown, with the motor on
the pivot. Blow on the fan or place it in a strong
wind. Depending on the wind direction and the
setting of the slide switch (S5), you may see
lights or hear sound. You may need to give the
fan a push to get it started.
This circuit can be used to warn you of
dangerous winds.
This circuit uses the solar cell (B7) to charge
the rechargeable battery (B4). Place the solar
cell in sunlight or near an incandescent light
bulb. The red LED (D1) lights when the battery
is being charged. The brighter the LED, the
faster it is charging.
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