DIY Magnetic Field Mapping Device V2 (High Sensitivity ADS System + PC Analysis Software)

This project is an upgraded version of my previous magnetic field mapping device, now redesigned with significantly improved sensitivity and a complete PC-based analysis system.

The Magnetron Geoscanner Basic V2 is a portable magnetic scanning device that allows you to map magnetic field variations over a selected area using a grid-based scanning method.

Compared to the previous version, this system uses an external ADS ADC module, resulting in much more stable and precise measurements.

In addition to real-time visualization on the device, the collected data can be processed using the included PC software, enabling advanced heatmap generation, interpolation, and multi-scan analysis.

🔹 This project is intended for experimental, educational, and DIY research purposes.

Main Electronics

1. Arduino Nano
2. ESP32 Touchscreen Display (Elecrow 4.3")
3. ADS1115 16-bit ADC Module
4. 25V Voltage Sensor Module
5. MicroSD Card Module
6. DC-DC Step Down Converter (XL4015 / XL4005)

Power System

1. 2x 18650 Li-ion Batteries
2. 2S Battery Holder
3. 2S Li-ion Charging Module (8.4V)
4. Power Switch

Sensors

1. 2x Magnetic Sensors (choose one type):
2. EMS100 Fluxgate Sensors
3. FLC100 Fluxgate Sensors
4. DRV425 Analog Magnetic Sensors

Mechanical Parts

1. 3D Printed Parts (STL files included)
2. Mounting screws

All files (firmware, software, STL and documentation) are provided in the project download link.

This version introduces several major improvements:

1. ✔ External ADS ADC for high sensitivity measurement
2. ✔ Much more stable and low-noise readings
3. ✔ Improved grid-based scanning system
4. ✔ Larger and more flexible scan areas
5. ✔ PC analysis software included
6. ✔ Heatmap interpolation (cubic & linear)
7. ✔ Iso-line (contour) visualization
8. ✔ Multi-scan merging (Quad mode)

The system works using a simple grid-based scanning approach:

1. Select grid size on the device
2. Place the sensor at each grid point
3. Record magnetic values
4. Repeat for the entire scan area
5. Save the scan data

The device displays values in real-time and generates a basic heatmap directly on the screen.

For more advanced analysis, the data can be transferred to a PC.

Hardware Overview

The system consists of:

1. Arduino Nano (data acquisition)
2. Dual magnetic sensors (gradiometer configuration)
3. ADS ADC module (high-resolution measurement)
4. ESP32 Touchscreen HMI
5. 18650 Li-ion battery system
6. DC-DC converter and power management

The dual-sensor setup allows detection of magnetic differences, improving anomaly visibility.

This method allows mapping magnetic variations point-by-point across the surface.

The included PC software allows advanced data analysis:

1. Load scan data (CSV format)
2. Generate high-quality heatmaps
3. Choose interpolation method (cubic / linear)
4. Enable iso-lines (contour visualization)
5. Merge multiple scans (Quad mode)
6. Export results as PNG

This enables analysis of larger areas by combining multiple scans into a single visualization.

The system produces:

1. Grid-based raw scan data
2. Real-time device heatmaps
3. High-resolution PC-generated heatmaps
4. Iso-line contour maps

These visualizations help identify magnetic anomalies and variations across the scanned area.

This is the improved V2 version of my previous project:

👉 https://www.instructables.com/DIY-Portable-Magnetic-Field-Mapping-Device-With-ES/

Contact

🌐 https://magnetrongeoscan.com

📧 info@magnetrongeoscan.com

All project files are available here:

👉Download Link

Included files:

1. Firmware (Arduino Nano + ESP32)
2. PC Software (EXE)
3. 3D printable STL files
4. STEP assembly file
5. Component list
6. User manual
7. Instructional videos

Notes

This is a DIY / experimental system

Not a certified professional geophysical device

Results may vary depending on environment and usage