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 ...

including a simple metal detector circuit. It’s a very basic concept that uses a coil of copper wire as a home-made choke — when metal or a magnet comes near the coil, it varies the output ...

An advanced metal detector coil encompasses the diameter of the sensor head. Passing current through the MD coil creates an electromagnetic field that induces an electrical current in any metal ...

Before you begin searching for buried treasure with a metal detector, you need to learn the laws governing such finds and ...

While shopping for a metal detector, you need to take into account a number of key factors, particularly the type, coil size, weight, and extra features like backlight and frequency customization.