Elenco 130-in-1 Electronics Playground - Manual (Page 81)

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This is the electronic bird circuit that you built for
Project 6 (The Woodpecker), but now it has a
photoelectric control of the transistor base. This
circuit is activated by light, so you can use it 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 light
will set off the bird and wake you up in the morning
– not too early and not too late.
From the original electronic bird, we have changed
only a few component values, and rearranged the
circuit schematic. See if you can find the changes and
rearrange the circuit so that it looks like Project 6. Use
the space provided to redraw the schematic.
Notes:
EXPERIMENT #63: “THE EARLY BIRD GETS THE WORM”
Schematic
Wiring Sequence:
1-29
2-30
3-107-109
4-27-137
5-41-110
15-88
16-28
76-87-106-40
119-42-115
75-116
105-108
120-138