Digital C-ESR meter. https://www.qsl.net/yo4hfu/ESR.html My version of the ESR meter. Made in the form of tweezers. I applied components from the best manufacturers. As a result, I got a stable in-circuit operation in the range of 0,001-0.01 Ohms. Polymer capacitor 150uF. ESR-0,004 Ohm.
This gives us the opportunity to measure in-circuit ESR of such capacitors. https://industrial.panasonic.com/cdbs/www-data/pdf/ABE0000/ABE0000COL61.pdf
Polymer capacitor 330uF 2v Panasonic.Max.ESR-0,0045Ohm. https://industrial.panasonic.com/ww/products/capacitors/polymer-capacitors/sp-cap/lx/EEFLX0D331R4 ESR-0,005Ohm.
I built one of these in a kit form, about $5.00 and $3.50 freight, and it is very versatile and accurate. Where you plug the components in for testing is chinsy, but the other parts have good tolerances. It has a self test function when you power it up. https://www.aliexpress.com/item/Sol...f9-4b55-89d4-51de7c6c33fc&transAbTest=ae803_4
Dick56 It seems to me, if you do not mind, it is more convenient to continue the conversation, go into this topic. https://www.electronicspoint.com/forums/threads/accuracy-component-tester.289954/
