Jeff Lubbert has been an avid metal detector since 1980 and joined The Ring Finders directory in 2010. He is an active ...

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 ...

Laznicka explains that a metal detector operates by emitting electromagnetic fields through a search coil, which interacts with the ground to locate metallic objects. When the coil encounters ...

If you think of a metal detector, you’re probably thinking of a fairly simple device with a big coil and a piercing whine coming from a tinny speaker. [mircemk] has built a more modern adaptation.