Didn't build this, but seems like it might be what you want/need, plus, it's really complicated and impressive...
**broken link removed**
Chemelec is also a member of this forum, and there other metal detector designs, as well as many other completed, built, tested, projects on his site. He also sells PCBs and custom or hard to find parts...
Didn't build this, but seems like it might be what you want/need, plus, it's really complicated and impressive...
**broken link removed**
Chemelec is also a member of this forum, and there other metal detector designs, as well as many other completed, built, tested, projects on his site. He also sells PCBs and custom or hard to find parts...