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Build the circuit as shown. Place the clear cable holder on
the color organ (U22) 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.The clear holder will be a loose fit.
Turn on the slide switch (S1), and blow on the microphone
or talk loudly into it. The signal from the microphone will
change the LED on the color organ, then send the light
through the fiber optic cable to the phototransistor, which
controls the red LED (D1).
Optional: Connect a music device (not included) to the
color organ as shown, and start the music on it. The music
device will control the red LED. Set the volume control on
your music device for best light effects. If you replace the
red LED with the speaker (SP), then you get sound effects
(beeping, not music).
Project 134 Fiber Color Organ
Project 135
Bright Fiber Color Organ
Build the circuit as shown. Place the clear cable
holder on the color organ (U22) 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. The clear holder will be a loose fit.
Turn on the slide switch (S1), and blow on the
microphone or talk loudly into it. The signal from the
microphone will change the LED on the color
organ, then send the light through the fiber optic
cable to the phototransistor, which controls the
white LED (D6).
Optional: Connect a music device (not included)
to the color organ as shown, and start the music
on it. The music device will control the white LED.
Set the volume control on your music device for
best light effects.
MP3
player
MP3
player
(Optional)
(Optional)
Black
Clear
Clear
Black
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