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I’m a professional PCB design engineer with extensive experience in developing high-speed digital, RF, and embedded system hardware. Over the years, I’ve successfully designed and delivered dozens of production-ready PCBs across various industries — from industrial automation and telecommunications to IoT, radar, and medical electronics. My work covers the entire product development cycle, including schematic design, PCB layout, signal & power integrity (SI/PI) analysis, EMI/EMC optimization, and DFM validation for mass production. I focus on precision, performance, and reliability, ensuring that every design meets the client’s technical and manufacturing requirements. My Expertise PCB Design: Multilayer, high-speed, RF/microwave, and mixed-signal boards High-Speed Interfaces: DDR, USB, HDMI, Ethernet, LVDS, PCIe EDA Tools: Altium Designer/Kicad/easyEDA/Eagle / OrCAD / Cadence Allegro /PADS Simulation Tools: Proteus/Multisim/CST / HFSS / ADS / LTspice / HyperLynx Hardware Design: Analog and digital circuits, power management, embedded boards Manufacturing Optimization: DFM, DFT, impedance control, EMC compliance Collaboration: Strong coordination with firmware, mechanical, and production teams What I Can Deliver ✅ Complete circuit & PCB design (Prototype to Mass Production) ✅ Enclosure design for PCB and 3D printing ✅ High-speed & RF PCB layout with impedance matching and SI/PI analysis ✅ EMI/EMC issue troubleshooting and optimization ✅ Design improvement and cost reduction consulting ✅ Antenna and RF front-end layout design ✅ Documentation for manufacturing and assembly

I am an Automation system design engineer, Hardware designer, Firmware developer and have the extensive experiences even over 15 years. I'm especially interested in home automation or making intelligent new products or acquire and application new technologies. I work with the target of design to low cost, low power, high performance, the miniaturization of device by a compact layout. I design carefully to achieve the best performance in all projects, I find joy and pride in the successful results of projects. The areas I've experienced a lot are as follows. ● STM32F103RCT6TR, STM32F407VGT6, STM32F429ZIT6, STM32L476RGT6, STM32H743ZIT6, etc. ● ESP32-WROOM-32D, ESP32-WROVER-E, ESP8266, etc. ● nRF51822, nRF52810, nRF52832, nRF52833, nRF52840, nRF52843, etc. ● RAK811, RAK831, RAK3172, RAK4200, etc. ● SIM7000G, SIM7070G, SIM7600E, SIM7600G, etc. ● Arduino Mega2560, Arduino Mega328P, etc. ● SRAM, DDR, DDR2, DDR3, LPDDR3, DDR4, DDR5, LPDDR4, etc. ● MEMS Sensors (3-axis, 6-axis, 9-axis), ECG, PPG, HRM, SPO2, CO, CO2, Humidity and Temperature, Touch, Pressure, PIR, etc. ● PCIe, SATA, Ethernet, HDMI, VGA, LVDS, USB, UART, USART, CAN, SPI, I2C, I2S, RS232C, RS485/RS422, etc. ● BLE, IoT, AWS, GPS, GSM, Bluetooth, Wi-Fi, Z-Wave, Zigbee, LoRa, NFC, RFID, LTE, etc.

I am an Electrical/Electronic Engineer having master's degree in electrical/Electronic Engineering with 14 years of experience in the field of Power electronics, Embedded systems, analog and digital electronics, Wireless sensor network and Internet of Things. I have developed hardware and Embedded systems of IOT devices, Environment Monitoring devices, Power electronic converters (DC -DC, AC to DC and DC to AC), Inverters, VFD (variable frequency Drive) simulation and Testing. I have skills and experience in following areas ✔Circuit Designing (analog and Digital), from concept to prototype and prototype to production ✔Firmware development based on STM32, Arduino, Raspberry Pi, ESP32 and ESP8266 ✔Wireless communication based on Lora Modules, Zigbee modules, NRF Module, NRF51822 BLE module ✔ IoT / Embedded Electronics Engineering Projects ✔Mathematical Modeling, Components Selection, Schematic Designing and PCB designing based on Altium Designer. ✔sourcing of components, negotiation of components and manufacturing of customized product ✔Testing and Debugging of Electronic circuits. ✔Hardware Designing of data loggers with sensors intergeneration. ✔Assembly services of electronic circuits and products ✔Robotics and automation ✔Power electronic converter circuit (buck converter, boost converter, inverters) designing testing and debugging ✔ ESP32 based projects like water quality tester, AI based gesture recognition system ✔ESP32 CAM based face recognition system ✔ESP32 based AI camera ✔ Arduino based embedded system projects using sensors and actuators' ✔Deep knowledge and expertise DC and AC motor driver designing ✔ EMI and EMC testing ✔Experienced Schematic and PCB designing trainer ✔ Experience embedded systems and IOT trainer

# Embedded Hardware Development & Electronics Manufacturing Partner | SME & Hardware Companies Helping hardware companies turn engineering concepts into manufacturable electronic products. I work with **electronics companies, hardware startups, OEM brands, and engineering teams** needing practical support across embedded hardware development, PCB design, prototyping, and low-volume manufacturing. With 20+ years in electronics engineering, manufacturing, and international supply chain collaboration, I bridge **product engineering and manufacturing execution** — helping clients reduce development risk, accelerate iteration, and improve production readiness. ## Why Clients Work With Me ✔ 20+ years in electronics engineering, manufacturing & supply chain management ✔ 13 years with Fortune 500 companies including Flextronics and Huawei ✔ Founder of engineering & manufacturing organizations-BTS SHENZHEN supporting hardware product development ✔ Direct access to cross-functional engineering and manufacturing resources in Shenzhen ✔ Experience supporting embedded electronics, IoT, industrial devices, telecom, smart products, and automation equipment --- ## Core Services ### Embedded Hardware Development • Hardware architecture & system design • Circuit design (analog / digital) • PCB design & layout • Embedded systems integration • MCU / wireless platform selection • Sensor & connectivity integration • DFM / DFT engineering review --- ### Electronics Product Development • Prototype development • Technology selection & feasibility analysis • Product engineering support • Engineering validation assistance • Manufacturing readiness planning --- ### Electronics Manufacturing Support • PCB fabrication & PCB assembly • Prototype build & pilot production • Component sourcing & supply chain coordination • Box build / product assembly support • Low-volume electronics manufacturing • Contract manufacturing coordination --- ## Typical Clients I am typically a good fit for: ✔ SME electronics companies ✔ Industrial IoT developers ✔ Embedded device companies ✔ Hardware product teams ✔ OEM / ODM brands ✔ Engineering managers needing external hardware development support --- ## Technologies & Domains ### Embedded / Hardware Platforms ESP32, STM32, ARM, Raspberry Pi, Jetson, embedded Linux platforms ### Connectivity BLE, WiFi, Ethernet, MQTT, NFC, RFID, Zigbee, LTE, NB-IoT, UART, SPI, I2C ### Product Categories Industrial IoT Smart Devices Monitoring & Measurement Embedded Electronics Consumer Electronics Automation Equipment Telecom & Connectivity Systems --- ## Working Style I deliver the best results when projects have: ✔ Clear technical objectives ✔ Defined scope or engineering requirements ✔ Collaborative communication ✔ Practical development and commercialization goals --- ## Selected Feedback "Frankie is an excellent engineer and supervisor… expecting my next opportunity to work with Frankie." — Huawei Hardware R&D Manager "Xiaolin’s team is very professional and hardworking… always satisfied with the jobs they delivered." — CEO, electronics product company "Outstanding support in hardware engineering and execution." — Engineering Director, global networking company Tags: Electrical Engineering, Electronics Engineer, 3Dmodeling,ID,Firmware, PCB layout, Schematics, Altium Designer, IoT, Power Electronics, Bluetooth, BLE, RF, TI,FPGA, SoC, VHDL, Verilog, Xilinx, Altera, C, C++, MCU, RTOS, prototype, validation, Enclosures, BMS, SolidWorks, Android, iOS, Java, Apps, Database, AWS, Python, ESP32, Arduino, PIC, NXP, STM32, LCD, Raspberry Pi, Wi-Fi, Prototyping, WAN, Assembly, Motor Driver, JLC,Electronic, Consumer, Automotive, Industrial, Medical, Custom Product Design, Supply Chain Management, Sourcing Agency,Procurement, Logistics, International Trade, Quality Control, Product Development, Manufacturing, Prototype, Testing, Product Launch, Project Management, Client Satisfaction, English, Chinese, China, Communication, Coordination, Innovation, Creativity, Technical Skills, Analytical Skills, Problem-Solving, Leadership, Time Management, Cost Reduction.