Carl Morelandpdf Work ((full)) — Inside The Metal Detector George Overton

The book provides a deep dive into the physics and electronics that allow a detector to "see" underground:

The authors explain the necessity of wrapping coil windings in a conductive, grounded layer (such as graphite paint or aluminum foil). This layer blocks parasitic capacitive effects caused by wet grass or electrostatic ground changes without blocking the magnetic field. Open-Source DIY Projects and Practical Code The book provides a deep dive into the