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Project #243 Fire Engine Symphony
OBJECTIVE: To combine
sounds from the music, alarm,
and space war integrated
OBJECTIVE:
Project #244
Fire Engine
Symphony (II)
Project #245
Vibration or Sound Indicator
OBJECTIVE: To build a circuit that is activated by
Set the slide switch (S1) on, the war sounds start playing
and the LED flashes. When all of the sounds are played,
the circuit stops. Clap your hands next to the whistle chip
or tap on it. Any loud sound or vibration, the whistle chip
produces a small voltage and activates the circuit. You can
repeat a sound by holding down the press switch (S2) while
it is playing.
The preceding circuit may be too
loud, so replace the speaker (SP)
with the whistle chip (WC).
Can you guess why the jumper is
used in this circuit? It is being
used as just a 3-snap wire,
because without it you don’t have
enough parts to build this
complex circuit.
Build the circuit shown and add the
jumper to complete it. Note that in
two places two (2) single snaps are
stacked on top of each other. Also,
note that there is a 2-snap wire on
layer 2 that does not connect with a
4-snap wire that runs over it on layer
4 (both touch the music IC). Turn it
on and press the press switch (S2)
several times and wave your hand
over the photosensitive resistor (RP)
to hear the full spectrum of sounds
that this circuit can create. Have fun!
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