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Measure Capacitor ESR With An Oscilloscope

And Function Generator

Contributed By: w2aew

This video discusses how to measure the ESR (equivalent series resistance) of a capacitor using an oscilloscope and function generator.  All of the capacitors tested in this video were 220uF electrolytic caps.  In reality, the resistance in the plates of a dried out electrolytic capacitor can’t be modeled as a simple series resistor, but for the purposes of identifying good from bad, this simplification works fine.

CLICK HERE  to view this 14 minute 57 second YouTube video.

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