Project Description: High-Performance Blitz PI Metal Detector

​Overview:

The Blitz PI is a professional-grade Pulse Induction (PI) metal detector built on the powerful STM32F103 32-bit microcontroller. This project stands out due to its exceptional stability and high-speed signal processing, which is far superior to traditional 8-bit detectors.

​Key Technical Features:

​Multi-Frequency Support: The device is highly versatile, operating at adjustable frequencies of 100Hz, 200Hz, and 400Hz, allowing for optimal performance in various soil conditions.

​Extreme Depth Capability: Thanks to its advanced processing and the 100Hz frequency mode, the Blitz PI can reach impressive depths of 3 to 4 meters, depending on the target size and coil configuration.

​OLED Display Interface: It features a clear visual interface (OLED screen) for real-time signal monitoring and easy adjustment of settings.

​Rock-Solid Stability: The integration of the STM32 MCU ensures a very stable operation with minimal drift, providing a reliable experience for serious treasure hunters.

​Easy Programming: One of the best features of this design is the built-in USB DFU bootloader, which allows users to update the firmware directly via USB without needing any external programmers like ST-Link.

​Why I Built This:

I decided to implement this project to bridge the gap between DIY hobbyist tools and professional treasure-hunting equipment. The Blitz PI offers high sensitivity and deep-ground penetration that rivals expensive commercial units.