Metal detecting is a fun pastime, even when all you can find is a little bit of peace and a whole lot of pop tabs. [Huygens Optics] has a VLF-based metal detector that offers much more feedback ...

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.

Treasure hunters scanning what lies beneath the soil may find a few scattered coins or discarded hardware with a metal detector, but one lucky man who wasn’t searching for long hit a jackpot.

How 7 Friends Testing a Metal Detector Made Britain’s Most Valuable Treasure Find A pastime in a farmer’s field led to the discovery of Norman-era coins valued at more than $5 million.