Elenco Motion Detector - Manual

If you have any problems, contact Elenco ®
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(800) 533-2441 Fax: (847) 520-0085 ● e-mail: [email protected] ● Website: www.elenco.com or www.snapcircuits.net
WARNING: SHOCK HAZARD -
Never connect Snap Circuits ®
to the electrical outlets in your
home in any way!
WARNING: Always check your wiring before
turning on a circuit. Never leave a circuit
unattended while the batteries are installed.
Never connect additional batteries or any other
power sources to your circuits.
Motion Detector
Model SCP-13
753162
Snap Circuits ® uses electronic blocks that snap onto a base grid to build different
circuits. These blocks have different colors and numbers on them so that you can
easily identify them. Build the circuit shown by placing all the parts with a black 1
next to them on the clear base grid first. Then, assemble parts marked with a 2.
Then, assemble the part marked with a 3. Install three (3) “AA” batteries (not
included) into the battery holder (B3). Place the base grid into the blue stand (with
either the battery holder or the NPN transistor (Q2) closest to the stand) and
carefully stand it up. Position it near the edge of a table, facing across a room.
Turn on the slide switch (S1). The color LED (D8) lights and the horn (W1) sounds
for a few seconds on start-up, and then whenever the circuit detects motion in the
room.
This circuit will work in the dark, but be careful not to hurt yourself moving around
a room in the dark.
Project 1 Motion Detector
Placement
Level Numbers
+
Project 2 Silent or Noisy Motion Detector
Use the circuit from project 1,
but remove the horn (W1). The
circuit works the same, except
no longer makes any noise. If
desired, try placing the egg on
the color LED (D8), but it may
not fit tightly enough to stay on
when the circuit is placed in the
blue stand.
Next, replace the color LED
(D8) with the horn. Now the
circuit makes noise but not light.
Egg
(place on
color LED)
Project 3 Low Power Motion Detector
Place the base grid into the blue
stand (with either the battery
holder or the 2-snap wire
closest to the stand) and
carefully stand it up. Position it
near the edge of a table, facing
across a room.
Turn on the slide switch (S1).
The color LED (D8) lights for a
few seconds on start-up, and
then whenever the circuit
detects motion in the room.
This circuit is
pictured on the
front of the box,
use that picture to
help in building it.
Objects that generate heat, including people and
animals, also produce infrared radiation. Infrared
radiation cannot be seen wth our eyes, but can be
detected.
The motion detector (U7) is designed to detect
changes in infrared radiation, especially the type
emitted by people. The NPN transistor (Q2) acts as
an amplifier, helping the motion detector turn on the
color LED and horn.
The color LED will not be as bright
as it was in projects 1 & 2,
because this circuit does not have
the NPN transistor (Q2) as an
amplifier. This circuit uses less
electricity than projects 1 & 2, so
your batteries will last longer.
SCP-13_022014.qxp_SCP-13 Instructions 3/7/14 10:46 AM Page 1