52. Magnet & Switch-controlled
Alarm & LED Series
Connection
Build the circuit, first press the switch (62),
then move the magnet (7) towards the
reed switch (83), you will hear the alarm
(78) sound very faintly. The LED (69) will
turn on at the same time. If you move the
magnet (7) away the alarm (78) and LED
(69) will turn off.
53. Magnet, Switch & Press
Switch-controlled Alarm &
LED Series Connection
Build the circuit, press the switch (62),
then hold the press switch (61). Now move
the magnet (7) towards the reed switch
(83), the alarm (78) will sound very faintly,
while the LED (69) turns on. If you release
the press switch (61) or move the magnet
(7) away, both the alarm (78) and LED (69)
turn off.
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