It’s very simple to implement a valid metal detector with good performances. Very often people lose their metal objects at the beach or in the countryside. Coins, rings and necklaces disappear when ...

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 ...

Electromagnetic fields are everywhere, all around us. Some are generated naturally, but in vast majority of cases, it’s we humans that are generating them with artificial, electronic means. Everything ...

Want to find hidden metal objects with ease? This simple magnet trick is a game-changer! With just a few basic materials, you'll be able to detect metal objects that were previously invisible. Whether ...

If you're like most people, you have a hobby that keeps you busy whenever you have downtime. Whether that's collecting highly valuable retro video games or going hiking with your favorite tech gadgets ...

The original application of the circuit in Figure 1 was to locate coins, but it applies wherever you need to locate metal objects. The circuit uses a beat-frequency technique: Whenever a metal object ...