Project #pc2, Screaming fan pc – Elenco Computer Inteface for Snap Circuits® User Manual
Page 12
Now adjust the horizontal scale so the peaks line up with the
gridlines as they did before.
Notice that all the peaks went down in frequency by a
corresponding amount and many changed in amplitude, that is why
your ears hear a different sound. Notice also that in this case the
left-most frequency peak no longer is the highest in voltage (your
results may vary).
Horizontal scale
-11-
Now you can click on the FFT box to return to oscilloscope mode
and look at the waveform with the 0.1mF capacitor in the circuit. You
can observe it with the same settings as before for comparison, but
these settings usually work best:
Project #PC2
OBJECTIVE: To demonstrate storage mode.
Screaming Fan PC
!
WARNING:
Moving parts.
Do not touch the fan or
motor during operation. Do
not lean over the motor.
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