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 ...

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 ...

This simple circuit can be used to activate whatever you like, for example, by connecting it to microcontroller, relays, secret alarms, robot applications or just turn on LED1 which lights up as long ...

In any discussion of metal detectors, you're likely to run across the name Garrett. Are they worth the money, though? Here's ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan is a writer who covers air and water quality and ...

When working around mains voltages, it can be useful to know whether a given circuit is live or not. While this can be done by direct connection with a multimeter, non-contact methods are available ...

For most of us, the fantasy of finding buried treasure faded away along with other childhood passions, like my youthful ambition to set a Guinness World Record for building the world’s largest pillow ...

A surgeon at an Israeli hospital is using a simple metal detector purchased from AliExpress to locate shrapnel in war casualties. Since the war broke out on October 7, thousands of people have been ...