How do metal detectors work? First of all, metals interact with magnetic fields. “If you have a time-varying magnetic field, that magnetic field inside that metal creates eddy currents,” Kamal ...

But how exactly does a metal detector determine there’s metal to be found among rocks, roots, sand and soil? There is a scientific principle at work, and it all has to do with electromagnetism ...

His STM32-based pulse induction metal detector looks good and works well, as you can see in the video below. [Mirko] reports that the device can detect a coin at 30 cm and a large metal object at ...

To start with, [zaphod] had to research how a metal detector actually works. After reviewing the pros and cons of various approaches, the decision was made to go with a beat frequency oscillator ( ...

The metal detector circuit shown here must represent the limits of simplicity for a metal detector, yet the design works surprisingly well. It uses just one 40106 hex Schmitt inverter IC, a capacitor ...

Metal Detector works by measuring the magnetic field around the location of your Android phone. It begins with a baseline measurement, then when it detects a metal, the measurement goes up and the ...