Elenco Snap Circuits® Deluxe Sound & Light Combo - Manual (Page 86)

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Project 163 Blow Sound Changer
Short Light Project 165
Shorter
Light
Project 164
When you turn on the switch (S1), you hear a siren sound. Blow into
the microphone (X1) to change the sound.
RV is used as a fixed resistor (50kW); so moving its control lever will
have no effect.
Build the circuit, turn on the slide switch (S1), and push
the press switch (S2). The white LED (D6) is on for a
while and then shuts off. Turning S1 off and back on will
not get the light back on. Push S2 to get the light back on.
Replace the white LED with the color LED (D8) to change
the light style.
RV is used as a fixed resistor (50kW); so moving its
control lever will have no effect.
Use the preceding circuit but
replace the 100kW resistor (R5)
with the smaller 5.1kW resistor
(R3). Now the light doesn’t stay
on as long.
The light is on while the 100mF
capacitor (C4) is charging, and shuts
off when the capacitor gets fully
charged. Pressing S2 discharges the
capacitor. The charge-up time is set
by the capacitor’s value and resistors
R5 and RV.
SCC-350_Manual_Part_B.qxp 7/25/14 2:05 PM Page 30