Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 90)

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Project 178
Narrow Range Tone
Project 177 Touch Light
Project 179 Slow Off Lights
Build the circuit. It doesn’t do
anything, and may appear to be
missing something. It is missing
something, and that something is
you.
Touch points A & B with your fingers.
The white LED (D6) may be lit. If
isn’t bright, then you are not making
a good enough electrical connection
with the metal. Try pressing harder
on the snaps, or wet your fingers
with water or saliva. The LED should
be bright now. You can replace the
white LED with the red or color
LEDs (D1 & D8).
Turn on the slide switch (S1), and push the press switch (S2). The red
and color LEDs (D1 & D8) stay on for a few seconds after you release
the press switch.
You can change how long the LEDs stay on for by replacing the 100mF
capacitor with the 0.1mF capacitor, by replacing the 100kW resistor (R5)
with the 5.1kW resistor (R3), or by removing the 100kW resistor.
For more fun, try swapping the locations of the LEDs, or replacing either
with the white LED (D6).
Turn on the switch (S1)
and move the lever on
the adjustable resistor
(RV) around. The circuit
makes a tone sound, but
only over a small range
of settings on RV.
Replace the 0.1mF
capacitor (C2) with the
1mF capacitor (C7). The
tone is a little different
now.
SCC-350_Manual_Part_B.qxp 7/25/14 2:05 PM Page 34