Elenco Circuit Maker Sound Plus 200 - Manual (Page 56)

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Build the circuit shown and press the press switch (S2). The circuit starts
to oscillate. This generates the sound of a high pitch bell.
Project #130
Steamship
Using the preceding circuit, connect the 0.1mF capacitor (C2) across the
whistle chip. Press the press switch (S2). The circuit now generates the
sound of a steamship.
Project #129 High Pitch Bell
Project #131
Build the circuit , and connect the two jumpers to it, place
the loose ends of the jumpers into an empty cup (without
them touching each other). Press the press switch (S2) -
nothing happens. Add some water to the cup and an alarm
will sound. Add salt to the water and the tone changes.
You can also test different liquids and see what tone they
produce.
Don’t drink any water used here.
Water Alarm
CM-200_Manual_031914.qxp_CM-200_Manual_031914 4/2/14 12:04 PM Page 56