Elenco Upgrade Kit SC100 to SC750 - Manual (Page 23)

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Project #151
OBJECTIVE: To turn off a circuit by blowing on it.
Blow Off a Space War
Project #152
Series Lamps
OBJECTIVE: To compare types of circuits.
Turn on the slide
switch (S1) and both
lamps (L1 & L2) will
light. If one of the
bulbs is broken then
neither will be on,
because the lamps are
in series. An example
of this is the strings of
small Christmas lights;
if one bulb is damaged
then the entire string
does not work.
Project #153
Parallel Lamps
OBJECTIVE: To compare types of circuits.
Build the circuit and turn it on,
you hear a space war. Since it is
loud and annoying, try to shut it
off by blowing into the
microphone (X1). Blowing hard
into the microphone stops the
sound, and then it starts again.
Turn on the slide
switch (S1) and both
lamps (L1 & L2) will
light. If one of the
bulbs is broken then
the other will still be
on,
because the
lamps are in parallel.
An example of this is
most of the lights in
your house; if a bulb is
broken on one lamp
then the other lamps
are not affected.