Elenco Electronics 202 - Manual (Page 54)

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Project #99
OBJECTIVE: To show how switches allow circuits to operate
independently even though they have the same power source.
This circuit combines projects #1, #2, and #6 into one circuit.
Build the circuit and place the fan on the motor (M1). Depending on
which of the switches (S1 or S2) are on, you can turn on either the
lamp (L2) (project #1), the motor (M1) (project #2), or both together
(project #6).
Lamp & Fan
Independent
Project #100 Motor Space Sounds
OBJECTIVE: To build a
circuit that uses a motor to
activate space war sounds.
OBJECTIVE: To build a circuit
that uses a motor to activate a
light diode.
This circuit is loud and may bother
other people around you so
replace the speaker (SP) with the
LED (D1), (position it like in project
#77); the circuit operates in the
same manner.
Project #101
Motor
Space Light
Turn on the slide switch (S1)
and wait for any sounds to
stop then spin the motor
(M1) and the sounds play
again.
Do you know why turning the
motor makes the sound
play? Actually, the DC motor
is also a DC generator and
when you turn it, the motor
generates a voltage that
triggers the sound circuits.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.