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Arduino Nano VLF Metal Detector Project
Here's a little something for the beginning of 2024.
Available on Amazon sites worldwide (check the Amazon site in your own country) and also via expanded distribution from booksellers and libraries.
Very low frequency (VLF) metal detectors are considered to be the most versatile of all the metal detector types.
This project incorporates two Arduino Nano processors, and provides excellent discrimination and target ID. Both the hardware and software are open-source and fully explained in the text.
This book is intended for the reader who has progressed beyond the level of flashing LEDs and generally testing the capabilities of the Arduino platform, and is now ready to construct something more advanced that will have a real practical use.
The majority of Arduino-based metal detector designs that can be found on the Internet are of the pulse-induction (PI) type, although there are a few relatively simplistic VLF circuits with a fairly low level of performance.
The aim of this particular project is to provide a design that is flexible enough to use a large number of commercial coils, and to provide target identification, and with everything explained in great detail.
All the design data is open-source and freely available (see below). The source code is downloadable as an Arduino sketch, which can be accessed and modified using the Arduino integrated development environment (IDE). The electronic schematic and printed circuit board (PCB) design were developed using KiCad. The Gerber files can be sent to a PCB manufacturer such as JLCPCB.
Prices in countries throughout the world are dependent on the exchange rate, but are based on the UK price.
Table of Contents
Main discussion area for the project is here -> Arduino Nano VLF Metal Detector Project - Main Discussion Area
Errata:
Component Parts List
1. Page 134: In the 10k listing the last resistor should be R70 (not R79).
2. Page 133: 2 X LT1054 (U2 & U3) missing from list of ICs.
3. Page 135: SENS external pot (1k) connects to J5 (J3 is the coil).
4. Page 135: AM/DISC switch connects to J7 and J12 (J9 is the Speaker/Headphones output).
5 .Page 135: Connectors J8 and J12 are missing from the 2-pin plug list.
Here's a little something for the beginning of 2024.
Available on Amazon sites worldwide (check the Amazon site in your own country) and also via expanded distribution from booksellers and libraries.
Very low frequency (VLF) metal detectors are considered to be the most versatile of all the metal detector types.
This project incorporates two Arduino Nano processors, and provides excellent discrimination and target ID. Both the hardware and software are open-source and fully explained in the text.
This book is intended for the reader who has progressed beyond the level of flashing LEDs and generally testing the capabilities of the Arduino platform, and is now ready to construct something more advanced that will have a real practical use.
The majority of Arduino-based metal detector designs that can be found on the Internet are of the pulse-induction (PI) type, although there are a few relatively simplistic VLF circuits with a fairly low level of performance.
The aim of this particular project is to provide a design that is flexible enough to use a large number of commercial coils, and to provide target identification, and with everything explained in great detail.
All the design data is open-source and freely available (see below). The source code is downloadable as an Arduino sketch, which can be accessed and modified using the Arduino integrated development environment (IDE). The electronic schematic and printed circuit board (PCB) design were developed using KiCad. The Gerber files can be sent to a PCB manufacturer such as JLCPCB.
Prices in countries throughout the world are dependent on the exchange rate, but are based on the UK price.
Table of Contents
- Introduction
- Chapter 1: VLF Metal Detector Technology
- Chapter 2: Transmitter Circuit
- Chapter 3: Voltage Converters
- Chapter 4: Arduino Nano #1 Software
- Chapter 5: Preamp Circuit
- Chapter 6: Synchronous Demodulators
- Chapter 7: Sample Pulse Generators
- Chapter 8: Differentiators
- Chapter 9: Comparators
- Chapter 10: Audio Amplifier
- Chapter 11: Target ID and Display
- Chapter 12: Arduino Nano #2 Software
- Chapter 13: Building the Detector
- Chapter 14: Induction Balance Coil Testing
- Chapter 15: Final Thoughts
- Appendix A: Component Parts List
- Appendix B: Full Schematics
- Appendix C: LTspice Simulations
- Appendix D: Resources and References
Main discussion area for the project is here -> Arduino Nano VLF Metal Detector Project - Main Discussion Area
Errata:
Component Parts List
1. Page 134: In the 10k listing the last resistor should be R70 (not R79).
2. Page 133: 2 X LT1054 (U2 & U3) missing from list of ICs.
3. Page 135: SENS external pot (1k) connects to J5 (J3 is the coil).
4. Page 135: AM/DISC switch connects to J7 and J12 (J9 is the Speaker/Headphones output).
5 .Page 135: Connectors J8 and J12 are missing from the 2-pin plug list.