Manual

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D
id you know that many marine animals
communicate to each other using sound? I bet you
have heard that dolphins and whales use sound for
c
ommunication, but what you probably don’t know
is that they are not the only ones. Due to research
we are able to find out that some fish are attracted
to certain sounds. Making this circuit, will allow you
do to some research of your own.
Once you make the last connection you are turning
on the power. You should be able to hear pulses of
sound coming from the speaker. The sound
changes by turning the control. This circuit is a type
of audio oscillator circuit, which you will learn more
about later in this book.
If you have a fish tank at home or at school you
should place your kit near the glass to see if the fish
are attracted to the sound. Are they?
If you like to fish, you should try this out while
fishing. What you need to do is attach another
speaker to terminals 1 and 2 using long lengths of
insulated wire. Wrap the speaker carefully in a
waterproof plastic bag or place it in a tightly sealed
jar. Make sure that no water is able to reach the
speaker. Lower the speaker into the water, cast your
fishing line, and see if you catch anything.
N
otes:
EXPERIMENT #8: CALLING’ FISH
Wiring Sequence:
o 1-29
o 2-30
o 3-93-100-110
o 4-120
o 5-41-109
o 27-94
o 28-40-99
o 42-119
Schematic
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