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Last Updated on: Wednesday, November 30, 2011 03:59 PM

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RF (radio frequency) Transmitter

Plastic Pipe Finder


I used this circuit once to track down the location of a plastic pipe, buried underground.  It transmits a weak RF signal, which can be picked up by a portable AM radio from about 6 feet away.

Click on Drawing Below to view PDF version of Schematic

circuit Plastic Pipe Finder Schematic



More  RF (radio frequency) Transmitter

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