Elenco Electronics 202 - Manual (Page 47)

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Project #83
OBJECTIVE: To show some new ways of using the alarm IC.
Place the fan on the motor (M1) and turn on the slide switch (S1). The
lamp (L2) lights, the motor spins, and you hear a machine gun sound
(with music in background). Thoroughly cover the photoresistor (RP)
with your hand and the sound becomes a siren. After a while the
sound will stop, hold down the press switch (S2) and the sound
resumes.
Fun with the Alarm IC
Project #84 Musical
Motor
OBJECTIVE: To use the music IC
to control the speed of a fan.
OBJECTIVE: To use the music
IC to control a lamp.
Use the circuit in project #84.
Replace the motor (M1) with the
6V lamp (L2). Now the music IC
(U1)
and press switch (S2)
control the lamp brightness.
Place the fan on the motor (M1) and
turn on the slide switch (S1). A song
is heard and the fan spins unevenly.
The fan speed is being controlled by
the music IC (U1).
Now press the press switch (S2) to
control the motor directly, and the
motor spins much faster.
Project #85
Musical
Light
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
!
WARNING: Moving
parts. Do not touch
the fan or motor during
operation.