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  • Introduction

    ITMD is Inside the Metal Detector -- a book about metal detector technology and design. It was written by George Overton and Carl Moreland. Currently there are two editions; the 1st Edition is out-of-print and the 2nd Edition is available for purchase on Amazon.com.


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    • ITMD2 Contents
      by Carl-NC
      Inside the METAL DETECTOR
      2nd Edition

      ISBN 978-0-9858342-0-3
      Publication date: May 2015
      250 pages

      Introduction

      Chapter 1: History of the Metal Detector
       The People
      The Applications
      The Companies

      Chapter 2: The BFO Principle

      Chapter 3: Designing a BFO Detector
      Reference Oscillator Design Search Oscillator Design Mixer and Detector Design Headphone Amplifier Th...
      03-16-2022, 04:35 AM
    • ITMD Edition 2
      by Carl-NC
      This is the support section for the 2nd Edition of ITMD.

      Table of Contents

      PCB Gerbers

      C Source Code

      Errata List
      03-16-2022, 12:09 AM
    • ITMD Edition 1
      by Carl-NC
      This is the support section for the 1st Edition of ITMD.

      Table of Contents

      PCB Gerbers

      C Source Code

      Errata List
      03-15-2022, 11:53 PM
    • ITMD Source Code
      by Carl-NC
      Source code files for ITMD Editions 1 & 2

      The following zip file contains both the C source code and hex files for the PI2, PI3, and PI4 projects.



      The following zip files contains source code for the Coil Calculator.

      Tcl/TK Version:

      JavaScript Version: ...
      03-15-2022, 05:21 PM
    • Gerber Files
      by Carl-NC
      Gerber files for ITMD Editions 1 & 2

      Ch 3:

      Ch 4:

      Ch 8:

      Ch 9:

      Ch 12:

      Ch 12:

      Ch 12:

      Ch 12: ...
      03-15-2022, 05:06 PM
    • Errata List
      by Carl-NC
      ITMD 1st Edition
      Errata List

      Technical Errors
      1. DFX schematic shown on the front cover, but it mentions White's XLT inside.
      2. Page 38 – Fig. 4-5 – Off-resonance probe has incorrect pin numbers on IC3. These should be VDD=8, VEE=4, INV=3, NINV=2 and OUT=7. The PCB layout is correct.
      3. Page 100 - First derivative should be dX/dt = Aw cos(wt), and second derivative should be d^2x/dt^2 = -Aw^2 sin(wt).
      4. Page 110 - The Raptor schematic
      ...
      03-15-2022, 07:07 AM
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