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 ...

Dive into the world of treasure hunting and learn how to build your very own metal detector using everyday items! Uncover hidden gems and lost artifacts right in your backyard. Perfect for adventurers ...

In the course of trying to make out yard a properly graded area of grass, with some plots for veggies and flowers, I have torn up a decent chunk of dirt. And, in the process of doing so, as well as ...