Manual

Project 82 Triple Parallel
Build the circuit and turn on the slide switch (S1). The white and color
LEDs (D6 & D8) are bright, and the horn (W1) is loud.
Most likely the battery voltage (4.5V)
will not be strong enough to turn on
any of the LEDs (D6 & D8) or the
horn (W1) when all are connected
together in series. Adding the press
switch (S2) bypasses one of them,
and should allow the remaining ones
to operate, though probably not at
their best.
Project 81 Triple Series?
Build the circuit as shown, leaving the press switch (S2) out of the circuit
for now. Turn on the slide switch (S1); most likely nothing will happen.
Now add the press switch between the points labeled A&B, B&C, or
C&D, and push it. Try it at all 3 locations.
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Both LEDs and the horn are all
connected in parallel, and have
enough voltage to perform at
their best. Compare this circuit
to projects 75-80.