Windy Lights

Project Number: 9

Description: Build the circuit shown. Set the meter to the 5V setting. Blow on the fan or place it in a strong wind (either outside or near an electric fan). The meter measures how much voltage your "windmill" produces. You may need to give the fan a push to get it started. Push the press switch (S2) to connect one of the LEDs (D1 & D5) to the windmill. The voltage produced drops a little, but not as much as for the solar cell circuits. Flip the slide switch (S5) to try the other LED. Compare the brightness of the LEDs at different wind speeds.

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