Recommended · for some experience
#135: Measure Capacitor ESR with an Oscilloscope and Function Generator
Why people recommend it
A w2aew tutorial on measuring a capacitor's ESR with a function generator and oscilloscope, recommended when diagnosing failing electrolytics in repair work.
Watch for: Needs a scope and signal generator rather than a dedicated meter
In their words
Alas the data on minimum ESR is rather sketchy (nothing for "C" case for example), so you have to guesstimate from just these two graphs (or get an ESR meter and measure it, or even just with your scope and a function gen that can hit those MHz frequencies where you see oscillation.)
got trolled too much this week on electronics.stackexchange.com, Oct 2015. CC BY-SA.
Anyone else interested should note the 99 cent ESR (in comment above) and there's a good tutorial on
Transistor on electronics.stackexchange.com, Apr 2015. CC BY-SA.
