Simple circuit serves as milliohmmeter

Posted on Dec 11, 2012

When I was recently debugging a design, I discovered that a short circuit existed from a ground plane to a power plane. I did not have access to a milliohmmeter or an equivalent tester for locating this type of short circuit. So, I logged onto the Internet to find an easily constructible milliohmmeter. I found the answer in a manufacturer`s data sheet, which outlined the basic four-wire method of making low-resistance measurements.

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