Manual

-12-
For your first experiment you are going to make a
c
ircuit that sounds like a woodpecker chirping.
F
ollow the wiring sequence carefully and observe
the drawings. Don’t forget to make all the proper
connections and have fun!
The simple circuit shown here does not have a key
or a switch, but you can easily add one. Replace
connection 124-28 with connections 124-137 and
138-28 to connect the key. Or, you can hook the
switch up by replacing 124-28 with connections
124-131 and 132-28. Now you can easily turn off
and on the circuit. Go outside and see if you can
attract birds with it.
Want a different sound? Try varied combinations of
capacitance and resistance in place of the 100mF
capacitor and the 1kW resistor. To change the
100mF capacitor to 470µF, disconnect terminal 116
and transfer to terminal 118. Then, reconnect the
wire from 115 to connect to 117. Your “bird” might
sound like a cricket, or a bear!
Also, you can try using the 3V power supply.
Disconnect terminal 119 and connect it to terminal
123. Now your bird might sound like an English
sparrow. Feel free to experiment. Just don’t replace
the 47kW resistor with anything below 10kW,
because it might damage the transistor.
Notes:
EXPERIMENT #1: WOODPECKER
Wiring Sequence:
o 1-29
o 2-30
o 3-104-106
o 4-28-124
o 5-41-105
o 27-88
o 75-87-103-40
o 115-42-119
o 76-116
o 121-122
Schematic
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