Elenco Snap Circuits® Deluxe Sound & Light Combo User Manual
Page 93
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Project 182
Infrared Optical Audio
Project 183
Test the Color Organ
MP3
player
Headphones
(Optional)
Remote
Black
Clear
You need an infrared remote control for this project,
such as any TV/stereo/DVD remote control in your
home.
Build the circuit as shown. Place the clear cable holder
on the white LED (D6) and the black cable holder on
the phototransistor (Q4), then place the fiber optic cable
into the holders as far as it will go. For best performance
the fiber optic cable should stand straight up in the
holders, without bending them.
Turn on the switch (S1). Point your remote control
toward the infrared module (U24) and press any button
to activate the white LED (D6). Light is transmitted from
the white LED, through the fiber optic cable, to control
the strobe IC (U23) and speaker (SP2).
The motor (M1) is used as a 3-snap here, and will not
spin. Sometimes this circuit may activate without a
remote control, due to infrared in sunlight or some room
lights. You may get better results in a dark room.
This project tests the features of the color organ (U22), and will be referenced by
the Advanced Troubleshooting section on page 24.
A. Build the circuit, and turn on the switch (S1). The light on top of the color organ
should be changing colors.
B. Remove the 0.1mF capacitor (C2), add a 2-snap across the points marked Y &
Z, and reset the circuit by turning it off and on using the switch. Connect the
red jumper wire between the point marked “X”, and points marked “R”, “G”, or
“B” in the drawing. Touching R should make the light red, G should make it
green, and B should make it blue.
C. Remove the 2-snap that was added across points Y & Z. Connect a music
device (not included) and headphones (optional, and not included) to the color
organ as shown, and start music on it. Set the volume control on your music
device so that the light on the color organ is changing (the light will not change
if your volume is set too high or too low).
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