Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 162)

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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 cable should stand straight up in the
holders, without bending them.
Turn on the lower slide switch (S1) and press some of the green
keys on the keyboard (U26). Then turn on the upper slide switch
to activate the fiber optic cable, and also press some of the green
keys.
Next, replace the color LED (D8) with the photoresistor (RP) and
vary the light shining on it. Turn on both S1 switches and press
some of the green keys.
Project 385 Fiber Keyboard Control
Black
Clear
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 slide switch (S1) and press some of the green
& blue keys on the keyboard (U26). Try this at different
settings on the 500kW adjustable resistor (RV3).
Project 386 Fiber Optic Feedback
Black
Clear
SCC-350_Manual_Part_C.qxp 7/25/14 2:11 PM Page 50