For readers tempted to reduce metal detection to hobbyist lore, this project reframes it as a mode of inquiry. For those already familiar with the practice, it lays out a humane, ethical template for doing the work well. And for everyone else, it reveals a simple truth: beneath our feet lies a chorus of histories, and if we learn to listen, we might discover how those histories still hum through the present.
Unlike standard theoretical textbooks, Overton and Moreland provide fully realized, open-source projects. Readers can build these projects directly on an electronics test bench. Complete CAD data, Gerber files, and source codes are shared in conjunction with the Geotech Forums .
The book explains the basics of induction , magnetics , and eddy currents , including how targets respond to magnetic fields. For readers tempted to reduce metal detection to
Through their open-source philosophy, the authors provide full CAD layouts, Gerber files, and microprocessor code natively on the Geotech Forums to support the hands-on engineering workloads detailed in the text. Core Technical Concepts Explained
Advanced projects that merge legacy analog front-ends with modern digital microcontrollers to automate timing delays, pulse integration, and auto-tuning routines. Edition Formats and Official Availability The book explains the basics of induction ,
A standout feature of this work is its emphasis on hands-on application. It is particularly popular in the DIY and maker communities for including: Google Books Working Designs
The book, a 300-page volume with a second edition published in 2015, is a comprehensive guide that leaves no stone unturned. It stands out because it is intended for interested in the "how" and "why" behind the equipment. The book is meticulously structured, starting with the fundamentals and progressing to advanced, buildable projects. the authors provide:
It explains how detectors can ignore mineralized soil while still detecting small metallic items.
+-----------------------------------------------------------+ | Transmitter Circuit | | Generates AC Signal / Alternating Magnetic Field | +-----------------------------------------------------------+ | v +-----------------------------------------------------------+ | Search Coil Loop | | Induces Eddy Currents in Sub-Surface Metal Targets | +-----------------------------------------------------------+ | v +-----------------------------------------------------------+ | Receiver & Demodulator | | Filters Ground Noise, Decodes Phase Shifts & Amplitude | +-----------------------------------------------------------+ 1. Electromagnetic Induction and Target Physics
For those interested in technical implementation, the authors provide: