It depends what you are trying to do. Looking for gold nuggets ? Lost coins at the beach ? Nails in the wall ? Sorting garbage ?
You might find it useful to google "diy metal detector" and read some of those.
It depends what you are trying to do. Looking for gold nuggets ? Lost coins at the beach ? Nails in the wall ? Sorting garbage ?
You might find it useful to google "diy metal detector" and read some of those.