Rough Science has a gold theme running through it, and one of the challenges for the first episode was to make a metal detector to help locate this precious metal. Iron, gold and other metals Metals ...

This project from a few years back is an interesting take on a metal detector. Instead of building a detection circuit, [Bruno Gavand] replaced the external clock crystal with an inductor. Here you ...

Have you ever found yourself suddenly in need of finding a small metal object hidden in the woods? No? Well, neither have we. But we can’t say the same thing for [zaphod], who’s family was hoping to ...