Elenco Deluxe Snap Rover® - Manual (Page 23)

Project #20
Add the purple jumper wire across the points marked
& over the sound & recording IC (U9). The circuit
works the same way except you hear a clicking sound
instead of a musical tone.
Clicker Flicker
OBJECTIVE: To hear sounds and flash lights.
-22-
Project #21 Volume Control
Project #19
OBJECTIVE: To hear sounds and flash lights.
Tone Flicker
Build the circuit and connect the jumper wires as
shown, note that the 1K
Ω resistor (R2) is underneath
the 100 μ F capacitor (C4N). Turn on the right slide
switch (S1), you hear a tone and the white LED (D4)
flashes. Turn on the left slide switch to shut off the tone
and push the press switch (S2) to stop the flashing.
+
OBJECTIVE: To control the volume of sound.
R
O
VER REAR
Build the circuit and connect the jumper wires as
shown. You hear a tone, use the switches (S1 and
S2) to adjust the volume.
Turning on the switches diverts some electrical
energy away from the speaker, reducing the volume
of the sound.
Use the knobs on the sound & recording IC (U9) if
you want to change the tone.
R
O
VER REAR
B A
A B