A metal detector used to be an entirely analogue instrument, an oscillator whose frequency changed with the inductance of its sense coil when a piece of metal approached. [Łukasz Podkalicki] shows us ...
Add Yahoo as a preferred source to see more of our stories on Google. On April 1, amateur metal detectorists Katarzyna Herdzik and Jacek Ukowski made a stunning discovery on a Polish beach. Their ...
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