Elenco Electronics EP-130 - The Early Bird Gets the Worm

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81
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This is the electronic bird circuit that you built fo
r
Project 6 (The Woodpecker), but now it has
a
photoelectric control of the transistor base. Thi
s
c
i
rcu
i
t
i
s act
i
vate
d
b
y
li
g
h
t, so you can use
i
t as an
early bird wake up alarm
.
To make the sound of the bird, press the key. You can
modify the control so that the right amount of ligh
t
will set o
ff
the bird and wake you up in the mornin
g
– not too early and not too late
.
From the ori
g
inal electronic bird, we have chan
g
ed
only a
f
ew component values, and rearranged th
e
circuit schematic.
S
ee if you can find the chan
g
es an
d
rearran
g
e the circuit so that it looks like Project 6. Us
e
the s
p
ace
p
rovided to redraw the schematic
.
No
t
es
:
EXPERIMENT #63: “THE EARLY BIRD GETS THE WORM”
S
chemati
c
Wiring
S
equence
:

1
-
29

2
-30

3
-1
0
7-1
09

4
-27-1
37

5
-
41
-
110

15
-
88

16
-2
8

7
6
-
8
7-1
06
-4
0

119
-
42
-
11
5

75-116

10
5-
108

1
2
0
-1
38