Elenco Projects 102-305 - Manual (Page 52)

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Project #243 Fire Engine Symphony
OBJECTIVE: To combine sounds
from the music, alarm, and space
war integrated circuits.
OBJECTIVE:
See project #243.
Project #244
Fire Engine
Symphony (II)
Project #245 Vibration or Sound Indicator
OBJECTIVE: To build a circuit that is activated by vibration or
sound.
Turn on the slide switch (S1), the war sounds start playing
and the LED (D1) flashes. When all of the sounds are
played, the circuit stops. Clap your hands next to the
whistle chip (WC) or tap on it. Any loud sound or vibration
causes the whistle chip to produce a small voltage, which
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 6-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 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, U1). Turn
it on and press the press switch (S2)
several times and wave your hand
over the photoresistor (RP) to hear
the full spectrum of sounds that this
circuit can create. Have fun!
Visit www.snapcircuits.net or page 74 to learn about more Snap Circuits ® products to add to your collection.