Elenco Snap Circuits SOUND &reg - Manual (Page 75)

Project 161
Fast Flicker
Clicker
Turn on the slide switch
(S1). Move the lever on
the adjustable resistor
(RV) around to make the
color LED (D8) flicker and
make clicking or buzzing
on the speaker (SP2).
Press keys on the
keyboard (U26) for more
fun effects. Try pressing a
blue key and a green key
at the same time, while
moving RV’s lever
around.
Use the preceding circuit, but replace the
1
m F capacitor (C7) with the smaller 0.1 m F
capacitor (C2). It works the same way, but
the tone has higher pitch, and the color
LED may appear to be on continuously.
Project 162
Slow Flicker
Clicker
Use the preceding circuit, but
replace the 1
m F capacitor (C7)
with the larger 470 m F capacitor
(C5). With RV set to the left,
the LED flashes and the
speaker clicks about once a
second. As you move RV’s
lever toward the right, the time
between flashes/clicks
increases and can get very
long. Also try holding down one
of the blue keys; best effects
are when RV is set toward the
left.
Turn on the slide switch (S1) and
push the press switch (S2). You
should hear a tone; adjust its pitch
using the adjustable resistor (RV).
The tone shuts off after about 10
seconds. Push S2 again to re-start
the keyboard and its timer.
Some settings on RV may not
produce any sound. Press S2 and
set RV to where you hear sound.
Project 160 Flicker Clicker
If the speaker is buzzing
and the color LED is on
but not flashing, then the
color LED is probably
flashing so fast that it just
appears as a blur.
Project 163 Timer Tone
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