56. Magnet, Switch & Press
Switch-controlled Alarm &
Motor Series Connection
Build the circuit, press the switch (62),
then hold the press switch (61). Move the
magnet (7) towards the reed switch (83),
you will hear the alarm (78) sound very
faintly while the motor (95) is off. If you
release the press switch (61), or move the
magnet (7) away, the alarm (78) and motor
(95) will turn off.
57. Switch-controlled LED and
Bi-directional LED Series
Connection
Build the circuit, press the switch (62), you
will see the LED (69) and the bi-directional
LED (71) turn on at the same time. If you
install the bi-directional LED (71) in the
reverse direction, then press the switch
(62), the LED (69) will turn on red while the
bi-directional LED (71) will turn on blue.
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