Capacitor esr tester 2011-09-13

This project was conceived as a way to enhance the collection of test equipment on my test bench. I buy a lot of older HP test gear off ebay as well as older radios. Most of this gear is 25-60 years old and needless to say, the condition of the electrolytic capacitors is somewhat suspect. I needed a way to quickly weed out bad caps with an in circuit tester.

What is ESR?

"ESR" stands for equivalent series resistance. ESR is one of the characteristics that defines the performance of...

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