Elenco Electronics 202 - Manual (Page 91)

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Project #211
OBJECTIVE: To build a motor-activated alarm.
Motor-activated
Burglar Alarm
OBJECTIVE: To b uild a light-activated
burglar alarm.
Project #212
Light-activated
Burglar Alarm
Place the circuit into a room you want guarded. Wind a piece of string
around the axis of the motor (M1) so when you pull it the axes spins.
Connect the other end of the string to a door or window. Turn the slide
switch (S1) on and wait for the sound to stop. If a thief comes in
through the door or window the string pulls and the axis spins. This
will activate the sound.
Use the circuit from project #211 shown above.
Connect a photoresistor (RP) across points A & B
and cover it or turn off the lights. Turn the slide
switch (S1) on and wait for the sound to stop. At
night, when the thief comes in and turns on the
light, the speaker (SP) makes the sound of a
machine gun.
Project #213 Spacey Fan
OBJECTIVE: To build a fan
with space war sounds that is
activated by light.
Place the fan onto the motor
(M1). Space war sounds are
heard if light shines on the
photoresistor (RP) OR if you
press the press switch (S2), the
fan may start to spin, but will only
get to high speed if you do
BOTH. Try various combinations
of shining light and holding down
the press switch.
!
WARNING: Moving parts. Do not touch the fan or
motor during operation.
!
WARNING: Moving parts. Do not
touch the fan or motor during operation.
!
WARNING: Moving parts.
Do not touch the fan or
motor during operation.