Elenco Deluxe Snap Rover® - Manual (Page 20)

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Project #14 Series Pitch Reducer
Project #13
OBJECTIVE: To show how resistors work.
Parallel Pitch Reducer
OBJECTIVE: To show how resistors work.
R
O
VER REAR
Build the circuit with the base grid centered on the Rover body,
and connect the jumper wires as shown. Set the upper knob
on the U9 to the middle and the lower knob to the right. Turn
on the top slide switch (S1) to hear a tone (sometimes a
recording will play first).
Turn on the lower slide switch (S1) to hear a lower-pitch tone
or turn it off for a higher-pitch tone. Push the press switch (S2)
to make the sound multi-tone.
The upper U9 knob changes the multi-tone effects and the
lower U9 knob changes the tone pitch.
Option A: replace either resistor (R1 or R4) with the 1K ohm
resistor (R2).
Turning on the switch
places the 100 ohm
resistor (R1) in parallel
with the 10K ohm
resistor (R4), changing
the resistance which
controls the pitch of
the tone.
R
O
VER REAR
Modify the preceding circuit to match this
one. It works the same way even though
the resistors are arranged differently.
Option A: replace either resistor (R1 or R4)
with the 1K resistor (R2).
Turning off the switch
places the 10K ohm
resistor (R4) in series
with the 100 ohm
resistor (R1), changing
the resistance which
controls the pitch of
the tone.