Elenco Green Projects - Manual (Page 18)

Project #9
5V
+
Project #8 Windmill
Windy Lights
Assemble the pivot, mount the wind fan on the motor
(M4), mount the motor on the pivot, place the pivot
on the base grid and connect it to the meter (M6)
using the red and black jumper wires. 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). You may need to give
the fan a push to get it started. The meter measures
how much voltage your “windmill” produces. Adjust
the pivot position to see how the voltage produced
changes with the angle to the wind.
The windmill uses
magnetism to change the
mechanical energy of the
spinning shaft into
electricity. The voltage it
produces is usually lower
than the solar cell, but the
current is higher.
+
5V +
5V
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.
ASSEMBLING PIVOT STAND
1 2 3
Place base on
flat level surface. Snap ball
on pivot
post into
pivot top.
Insert post
into base.
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