Hardware Design and Firmware Development Experience

✅ Summary

Hands-on embedded systems engineer with a strong background in biomedical instrumentation, sensor-based systems, and wireless communication protocols. Proficient in designing, prototyping, and validating custom PCB hardware for medical and research applications. Experience spans full-cycle development from schematic capture to firmware integration, with special attention to power optimization, EMI/EMC compliance, and real-time performance.

🛠 Technical Skills

Hardware Design & Prototyping

• Multilayer PCB layout and schematic design using EasyEDA, Altium
• Signal routing with consideration of SI/PI, EMI mitigation, and grounding strategies
• Design validation with oscilloscope, logic analyzer, and custom test jigs

Embedded Platforms

• MCUs: STM32 (F1/F4/H7), ESP32/ESP32-C3/ESP32-S3, AVR, RISC-V (CH32V)
• RTOS: FreeRTOS integration for real-time task scheduling, low-power modes, and inter-task communication
• Protocols: ESP-NOW, BLE, Wi-Fi, CAN, UART, I2C, SPI
• Networking: Embedded REST APIs for connectivity

Firmware Development

• Bare-metal and RTOS-based C/C++ firmware on STM32 and ESP32
• Edge AI and signal processing integration on embedded platforms
• Low-power system profiling with NRF Power Profiler and deep sleep tuning

Graphics & HMI Interfaces

• GUI development using LVGL, TFT_eSPI, for interactive touchscreen displays
• Real-time sensor display for diagnostic and lab instrumentation

🔍 Specialized Knowledge

Power & EMC Design

• Power domain separation, buck/boost converter integration, battery management systems
• Filtering techniques and PCB design for reduced EMI in lab/medical environments
• HIPOT and insulation testing for medical-grade safety assurance

Instrumentation Systems

• Analog front-end design for biomedical sensors
• Bioimpedance measurement, signal conditioning, and noise reduction techniques
• Real-time data acquisition and USB/CAN-based telemetry

🧰 Tools & Technologies

Hardware Tools

• Oscilloscope (100MHz+), Digital Multimeter, Logic Analyzer, LCR Meter, Hipot Tester, Function Generator
• NRF Power Profiler Kit for energy profiling and optimization in wireless devices

Software Platforms

• Hardware Design: EasyEDA (Standard & Pro), Altium Designer (learning in progress)
• Firmware IDEs: STM32CubeIDE, ESP-IDF, Keil uVision, MounRiver Studio
• Debugging & Programming: JTAG, SWD, ST-Link, J-Link, WCH-Link, DAPLink
• Scripting & Data: Python, Jupyter Notebook, serial logging and plotting

📑 Compliance & Certification Knowledge

• Familiar with CE marking requirements for electronic medical devices
• Understanding of IEC 61010, ISO 13485, RoHS, and EU MDR compliance processes
• Experience assisting in documentation and test planning for pre-certification verification
• Support in validation, risk analysis, and EMC/EMI testing during device prototyping phase