Elenco Electronics EP-130, Руководство пользователя

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Have you ever heard a red-headed woodpecker
chirping? Here is an electronic bird that sounds a
little like a red-headed woodpecker. If you have one
of these birds around your house, it might come to
visit this electronic relative!
This is a fairly simple circuit. Follow the wiring
sequence below and the drawings we’ve provided.
Make all the connections and have some fun with
this project.
The basic circuit we’ve shown here does not have a
switch or key, but you can add one very easily.
Simply replace wire connection 124-28 with
connections 124-137 and 138-28 in order to
connect the key. To use the switch, replace
connection 124-28 with connections 124-131 and
132-28. When you press the key or slide the switch,
the circuit path for the electrical current is complete
and you hear the woodpecker. The key provides a
more convenient control for carrying the kit outside
as you try to attract birds with your bird caller.
Try different combinations of resistance and
capacitance in place of the 1k
Ω
resistor and the
100
μ
F capacitor. To change the 100
μ
F capacitance
to 470
μ
F, disconnect the wire at terminal 116 and
reconnect it to terminal 118. Then, transfer the wire
attached to terminal 115 to terminal 117. Now your
“bird” might sound more like a cricket or a bear!
You can also try the 3V power supply (V is the
abbreviation for volt or volts - the basic unit of
measure of electric energy). Disconnect the wire
from terminal 119 and connect it to terminal 123.
Now the “bird” will sound more like an English
sparrow.
When experimenting with this circuit, you can
change almost anything without causing damage.
However, do not decrease the 47k
Ω
resistor to
below 10k
Ω
or the transistor might be damaged.
EXPERIMENT #1: ELECTRONIC 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