128 Triple Parallel - Elenco Electronics SC3DMEG Instruction Manual

Project 127
B
Project 128
-75-
C
D
Build the circuit and turn on the slide switch (S1). All the LEDs are bright.
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.
Most likely the battery voltage (4.5V)
will not be strong enough to turn on
any of the LEDs 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.
Triple Parallel
All the LEDs are all connected
in parallel, and have enough
voltage to perform at their best.