Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 125)

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Build the circuit as shown. Place the circuit in
a quiet room. Connect the speaker (SP2)
using the red & black jumper wires, then hold
it away from the microphone (X1). Turn on the
slide switch (S1). Talk into the microphone or
press keys on the keyboard (U26), and listen
the echo on the speaker. Adjust the volume
using the knob on RV3. Adjust the amount of
echo using the lever on RV; move the lever up
for more echo or down for less echo. Try this
at different RV settings, because the effects
are very interesting with both high and low
echo amounts.
Note: You must hold the speaker away from
the microphone or the circuit may self-oscillate
due to feedback. You also need a quiet room,
with low background noise.
Project 265 Capacitor Keyboard Control Project 266
Capacitor
Keyboard
Control (II)
Adding the capacitor changes
the range of tones produced
by the keyboard.
Project 267 Voice & Keyboard Echo
Build the circuit, and turn both
slide switches (S1). You hear
a sound pattern that is
synchronized with the color
LED (D8) flashing. Move the
lever on the adjustable
resistor (RV) to change the
sound produced. You can also
press keys on the keyboard
(U26) to change the sound.
Use the preceding circuit, but replace
the 1mF capacitor (C7) with the 0.1mF
capacitor (C2). The sounds are
different now.
SCC-350_Manual_Part_C.qxp 7/25/14 2:10 PM Page 13