Elenco Projects PC1-PC73 - Manual (Page 15)

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Project #PC3
OBJECTIVE: To demonstrate wait mode with multiple colors.
Hissing Foghorn PC
Build the circuit shown. If continuing from the previous experiment
then close the Winscope program and run it again, to reset the
settings. Click on the
On-Line button to activate, and turn on the
switch (snap part S1). Set Winscope to the settings shown on the
right, and move the lever on the adjustable resistor (snap part RV)
around to change the waveform and the sound. At some positions
there may be no sound. A sample waveform is shown here, but the
pattern and shape of the pulses depends on the adjustable resistor
setting.
On-Line
button
Settings