Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 165)

Project 392
-164-
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 cable
should stand straight up in the holders, without
bending them.
Turn on the right slide switch (S1). The adjustable
resistor (RV) controls the motor speed. Press
some of the green & blue keys on the keyboard
(U26) to get interesting sound and light effects.
Try it with the left slide switch both on and off, and
see how the effects change.
The 100kW resistor (R5) is used as a 1-snap here
(supporting RV), and is only connected on one
side.
Project 391 Crazy Circuit
Black
Clear
Set the 500kW adjustable resistor (RV3) to mid-range, turn OFF the left
slide switch (S1), and then turn on the right slide switch. Now turn on
the left slide switch, you hear a beep signaling that you are recording.
Move the lever on the adjustable resistor (RV) around until you hear a
second beep (about 10 seconds), which signals that recording is
finished. Push the press switch (S2) to play back the recording, and turn
the knob on RV3 to change the playback speed.
In this circuit there are two ways to adjust the tone speed: using the
lever on RV while you are recording, and using the knob on RV3 during
playback. Try both methods separately, and then together.
Recording time is 6 seconds at normal speed, but this can be changed
depending on the setting of RV3 when you are making the recording.
You won’t hear the tone when it is being recorded; you only hear it
during playback.
Tone Speed Adjuster
SCC-350_Manual_Part_C.qxp 7/25/14 2:11 PM Page 53