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Introduction Attempting to put up a shelf over the weekend to create my own lab, I couldn’t find my mains power tracer. These things are used to detect buried mains cables in walls; the detectors are low cost, and available at DIY stores. The more wiring that is stuck into homes the more important such a tool becomes.   With the local stores being shut on a Sunday, I figured it was time to either borrow one or build one.   This post documents an AC mains power tracer that can b ...

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