⚡ Ultra-Precision Current and Voltage Measurement System

An embedded system for ultra-precise current and voltage measurement with minimal impact on the Device Under Test (DUT).

   

✨ Features

• Current Measurement: 1μA to 100mA
  • Resolution: 1μA (1μA-1mA range), 0.1mA (1mA-100mA range)
• Voltage Measurement: 1V to 12V
  • Resolution: 0.1V
• High-Speed Sampling: 2kS/s
• Real-time Display: Shows measurements and mode selection
• Minimal DUT Impact: Designed for non-intrusive measurements

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🔧 Hardware

• STM32 Blue Pill (main controller & ADC)
• ESP32/ESP8266 (user interface)
• Ultra-precision current/voltage sensing circuits
• UART communication between STM32 and ESP

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📁 Repository Structure

├── implement_stm32_voltage_safety/    # STM32 firmware
├── GUI_ESP32_01/                      # ESP32 interface implementations
├── GUI_ESP32_02/                      # ESP32 interface implementations
├── GUI_ESP8266_01/                    # ESP8266 interface implementation
├── PCB_DESIGN/                        # PCB design files
├── *.pdsprj                           # Proteus circuit simulation files
└── Test_HAL_UART_transmit/            # UART testing code

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🚀 Quick Start

1. Flash STM32 with firmware from implement_stm32_voltage_safety/
2. Flash ESP32/ESP8266 with GUI code from respective folder
3. Connect STM32 UART to ESP
4. Power on and connect probes to DUT

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🏗️ System Architecture

STM32 → Performs ADC sampling and measurement processing → Sends via UART → ESP32/ESP8266 → Displays real-time values

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🔬 Circuit Simulations

Proteus simulation files (.pdsprj) and circuit images (.png) are included for reference and verification.

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⚠️ Note

This is a precision measurement system. Proper calibration and careful handling of components are essential for achieving specified accuracy levels.