Elenco Computer Inteface for Snap Circuits® - Manual (Page 54)

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Project #PC63
Electronic Sound PC
OBJECTIVE: To view the output of an oscillator circuit.
Build the circuit and try the settings shown. Press the press switch
to lower the frequency of the signal by increasing the capacitance
in the oscillator. You can replace the 0.1mF capacitor C2 with the
10mF
capacitor C3 (“+” on the right) to further lower the frequency
of the tone. You may try other settings to zoom in or look at the
frequency spectrum.
Settings
Project #PC64
Replace the 100KW resistor R5 with the 10KW resistor R4, place the
0.1mF
capacitor back in the circuit as before. Now you change the
frequency by changing the resistance in the oscillator.
Electronic Sound
PC (II)