Who is the most simple PI detector circuit?

[kt315]

need to find a simple PI detector circuit.

thinking perhabs simple is Tracker-PI. done on three IC's like famous you russian balalaika with three strings.

[maikl]

Who is the most simple PI detector circuit?

There is no simple for you. You want to discover the coin away? Here's something for you : http://www.geotech1.com/forums/showt...549#post122549 How deep is XXD? 50cm or 20 inches for a Dime (18mm) or a Nickel (21mm) Both coins are cupro-nickel, but of slightly different alloy. So get ready for a lot of deep digging.

[yhl]

need to find a simple PI detector circuit.

[yhl]

Who is the most simple PI detector circuit?