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DIY HACK – How to make your own Metal Detector!

I’ve noticed many people using metal detectors on the beach lately to find treasures or junk but here’s a great way to make one of those yourself!

BFO ( beat frequency oscillator ) metal detectors use two oscillators, each of which produces a radio frequency. One of these oscillators uses a coil of wire that we call the search loop. The second oscillator uses a much smaller coil of wire, and is usually inside the control box and is called the reference oscil

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