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22 Jun 2024

Peakmeter PM8908C Disassembly

Tearing down and taking apart a non-contact Mains AC voltage detector. This pocketable test equipment has a pen-clip for pen-clip-like front-shirt-pocket carry. The orange is quite beautiful.

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These devices are essential when working with mains wiring as one often does while chasing IoT dreams.

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Double AAA batteries will power it for several months, if not a year — or more.

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The illuminated tip is much appreciated when poking around in darkened switch-box innards.

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A destructive disassembly reveals a simple but classy PCB.

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Not entirely unexpected, much of the mystery is hidden away under a blob.