Elenco Electronics 202 - Manual (Page 48)

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Project #86
OBJECTIVE: To combine the sounds from the music and alarm
integrated circuits.
Music Alarm Combo
Project #87 Bomb Sound
OBJECTIVE: Build a circuit that
sounds like a bomb dropping.
OBJECTIVE: Build a circuit
that sounds like bombs
dropping.
Use the circuit from project #87.
Replace the slide switch (S1)
with the motor (M1). Turn the
shaft on the motor and now it
sounds like a bunch of bombs
dropping.
Turn the slide switch (S1) on and you
hear the sound of a bomb dropping
and then exploding. The LED (D1)
lights and then flashes as the bomb
explodes. This is one sound
generated from the space war IC
(U3).
Project #88
Bomb
Sound (II)
Build the circuit shown and then place the alarm IC (U2) directly over
the music IC (U1), resting on the three 1-snaps. Turn on the slide
switch (S1) and you will hear a siren and music together. After a few
seconds, covering the photoresistor (RP) will stop the music (but the
siren continues).