Circuit diagram, calculation of expected gain for three experimental frequencies.
Implemented circuit, oscilloscope measuring across capacitor resistor parallel combination.
Measured composite input voltage and output voltage.
Voltage under frequency sweep.
Summary
Circuit behaves mostly as expected. The frequency sweep clearly shows greater attenuation at higher frequency as expected of a low pass filter. Curiously, while the lower two frequencies of the composite wave form were attenuated near as expected, the high frequency component appears to have been amplified. This is inconsistent with a low pass filter and something for which we don't have an explanation.
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