[Dzl] starts his write up with an explanation of how most oscillator based metal detectors work. This one differs by using an Arduino to read from the metal detecting coil. The circuit starts with ...

Shares in Amazon (AMZN) were looking less secure today as the tech giant reintroduced anti-theft policies at its ...

Woodbridge joins several other Middlesex County school districts that have already implemented metal detectors in their ...

Metal detectors were used for the first time this morning at Stuttgart School District campuses as students returned from ...

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 ...

a flat piece of stainless steel and a piece of welded scrap metal" through the metal detectors at one facility without detection. An evaluation of statewide policies on the use of metal detectors ...