METAL_DETECTOR
SPECTRAL_G4 // CORE_AI
Pushing the limits of traditional VLF detection. Spectral-G4 harnesses the power of the STM32G4 processor and external 18-bit SAR converters to analyze the phase of three harmonics simultaneously. This is more than a detector – it's a mobile geophysical lab integrated with local AI.
Spectral signature analysis allows for precise discrimination between ferrous and non-ferrous metals even in extremely difficult ground conditions. The system operates on raw I/Q vectors.
- [01] PHASE_SENSITIVE_DETECTION (PSD)
- [02] VECTOR_GROUND_REJECTION
- [03] SPECTRAL_SIGNATURE (AI)
CORE_SYSTEM_
COMPONENTS
FULL TECHNICAL DOCUMENTATION AVAILABLE AT: [ SPECTRAL_G4_REPOSITORY ]
FREQUENCY_ENGINE
F_CORE // Simultaneous analysis of 7.8kHz, 23.4kHz and 39.0kHz.
Detecting phase shifts for each harmonic separately. Allows building a precise spectral signature of the object (Spectral_ID).
ADC_ULTRA // 18-bit PulSAR for extreme dynamic range.
Eliminates the need for analog ground compensation circuits. The entire signal is digital, allowing for lossless Software-Defined filtering.
AI_BRAIN // Target classification via neural networks.
Instead of simple VDI thresholds, AI analyzes the full vector trajectory during coil movement, recognizing signature shapes of difficult targets.
G4_UNIT_RESERVATION
G4_SET // FOUNDER_PACKAGE
CO-CREATOR // Receive a prototype in exchange for supporting development.
Access to 'Series 0' prototype at production cost. Direct contact with the creator, influence on functionality.
Ideal for enthusiasts who want to help bring this gear to life and be the first to receive it.
takzen.app@gmail.comMULTIDIMENSIONAL_
OPERATION
Pure vector compensation without motion filters. Allows for target detection at zero coil speed, ideal for precise pinpointing and analysis of deep signals.
Multi-stage band-pass filters designed on STM32G4. Maximum dynamic range while eliminating ground mineralization influence.
Not just the base phase. We analyze the 3rd and 5th harmonics, allowing for unique discrimination of objects with similar VDI but different material structure.
G4_ADVANTAGE //
Signal_
Characteristics
Vector Ground Balance system eliminates soil influence with 0.01-degree phase accuracy, ensuring stability in difficult terrain.
Thanks to the 18-bit SAR converter, the system detects microvolt-level signals previously hidden in quantization noise.
Agentic signal analysis. AI decides in real-time whether a signal is worthy of attention or just EMI interference.
Processor latency below 1ms. Every signal reaches the audio directly, without delays typical of legacy signal processors.
PROJECT_CREATOR // Krzysztof_Takzen
I am Krzysztof. My goal is to redefine the modern metal detector by integrating low-level DSP with sovereign AI models. Spectral-G4 is the fruit of my search for the perfect balance between analog sensitivity and digital precision.
I specialize in Embedded Systems, STM32 microprocessor architecture, and digital signal processing. This project is a 'Code-First' manifesto in the hardware world – rigorous engineering and algorithm transparency.
As part of the Spectral-G4 project, I fulfill my mission through:
- >> Development of an open DSP platform for hobbyists
- >> Implementation of neural networks on microcontrollers
- >> Designing ultra-low-noise analog signal paths
REPOSITORIES //
DOCUMENTATION
FIRMWARE // STM32G4
Public demonstration repository (Showcase). Contains selected DSP algorithm fragments and project structure, demonstrating code style and engineering quality.
SYSTEM_OVERVIEW
Public technical documentation including block diagrams, interface specifications (SPI/I2S), and analog signal path characteristics. Full schematics exclusive to partners.