Project 81 Two-way Light Switch
Build the circuit on the left. Note that two of the 2-snaps are left
unconnected on one end because they will be used as switches in this
project. If you connect the free ends of each of these 2-snaps both to
the “high bar” or positions B in the figure or both to the “low bar” or
positions A in the figure, the color LED (D8) lights up. But if you connect
the free end of one of the 2-snaps to the “high bar” and the free end of
the other 2-snap to the “low bar”, then the color LED does not light up.
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Project 82 Machine Gun Buzz
Project 83
Double Flash
Machine Gun
Build the circuit shown on the left. Turn
on the switch (S1) and you hear a
machine gun and a buzzing sound,
while the color LED (D8) is changing
Use the preceding circuit, but
add the lamp (L1) across the
points marked A & B, on level 4.
A
B
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