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20
Project 9
Super Voice Light Show
This circuit is similar to project 5, but more sensitive. Build the circuit as
shown, initially set the adjustable resisitor (RV) to the middle, and place one
of the LED attachments (tower, egg, or ber optic tree) over the LED on
the color organ (U22). Turn on the switch (S1) and talk, or place a device
playing music near the micorphone (X1). The color organ light will follow the
sound, in tone and loudness.The speaker (SP) is used here to regulate a
transistor amplier for the microphone, and will not make sound.
Project 12
Color Oscillator
Build the circuit as shown, and place one of the LED attachments (tower,
egg, or ber optic tree) over the LED on the Color Organ (U22). Turn on the
switch (S1) and watch. The color organ light will change colors on its own.
This circuit is an oscillator;
it uses the color organ to
control itself.
LED
Attachments
Replace the 3-snap wire that is across base grid locations C2-E2 (next
to the 0.1mF capacitor (C2)) with the 100kW resistor (R5). Now the
color organ light changes more slowly.
Project 13 Slower Oscillator
Replace the microphone (X1) with the motor (M1). Spin the motor top
with your ngers to change the color organ light.
Project 10 Finger Light Show
Replace the motor with the color LED (D8) to create some interesting
effects.
Project 11 Funky Show
LED Attachments
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