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Project 58
Lift Loss
Build the circuit to the left.
Cover the photoresistor (RP) and turn on the slide switch (S1).
The motor (M1) should spin. If not, give it a push to get it started.
Now uncover the photoresistor or get a ashlight and shine it on
the photoresistor. The motor will slow down as more light reaches
the photoresistor, and will stop spinning if enough light reaches the
photoresistor. This circuit demonstrates how darkness can be used
to control a fan. Try this circuit with and without the fan on the motor.
Project 59
Laser Blaster
This circuit demonstrates
how sounds can be made
for electronic games.
Build the circuit shown on the left.
When you turn on the slide switch (S1), the integrated circuit (U2)
should start sounding a laser gun sound. This integrated circuit is
designed to produce different sounds that can easily be changed. You
can even switch the sound on and off quickly to add sound effects to
your games or recordings.
WARNING: Moving parts. Do not touch the fan
or motor during operation.
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