Manual

-25-
W
ith this experiment you may want to be careful not
to confuse your neighbors. This experiment sounds
as like a loud siren just like the real sirens on police
c
ars and ambulances. The tone is initially high but
as you close the key the tone gets lower. You are
able to control the tone just as the police and
ambulance drivers do.
The oscillator circuit being used is the same type
used in many other experiments in this kit. Press the
key and another capacitor is added to the circuit to
slow the action of the oscillator circuit.
N
otes:
EXPERIMENT #14: PATROL CAR SIREN
Wiring Sequence:
o 1-29
o 2-30
o 3-104-106-110
o 4-85-120
o 5-41-109
o 40-137-105-86
o 103-138
o 42-119
Schematic
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