Muhammad Hammad J.

Need a PCB that works the first time and survives manufacturing? I design embedded hardware, multi-layer PCBs, and firmware for STM32, ESP32, and nRF-based products, from schematic through production-ready Gerbers. Most PCB designers stop at layout. I combine hardware and firmware into one deliverable, so your board and code are built to work together from day one. My biomedical engineering background also adds real depth to wearable, sensor, and medical electronics projects, where analog signal integrity and safety matter most. ━━━━━━━━━━━━━━━━━━━━ WHAT I DO ━━━━━━━━━━━━━━━━━━━━ 💼 Embedded Hardware & Schematic Design Circuit architecture, component selection, power systems, protection circuitry, sensors, and communication interfaces. 💼 PCB Design & Multi-Layer Layout 2–6 layer boards, component placement, stack-up planning, grounding, return paths, decoupling, power distribution, mixed-signal layout, DRC, and DFM. 💼 High-Speed Digital Design USB, USB-C, Ethernet, HDMI, differential pairs, controlled impedance, length matching, and signal-integrity-aware routing. 💼 RF & Wireless Hardware BLE/Wi-Fi integration, antenna placement, RF feed routing, matching networks, keep-outs, and grounding strategy. 💼 Power & Battery Electronics Buck/boost converters, LDOs, battery charging, BMS/protection circuitry, power distribution, and low-power design. 💼 Analog & Sensor Electronics ADC/DAC interfaces, analog front ends, signal conditioning, sensing, measurement, and mixed-signal electronics. 💼 Embedded Firmware Embedded C/C++ for STM32, ESP32, nRF, AVR, and ARM platforms, including peripherals, sensors, connectivity, control logic, and hardware integration. ━━━━━━━━━━━━━━━━━━━━ CORE TECH STACK ━━━━━━━━━━━━━━━━━━━━ 🌟 MCUs / Platforms: STM32, ESP32, nRF, AVR, ARM Cortex, SoCs, SoMs, SiPs 🌟 Protocols: I²C, SPI, UART, RS-232, RS-422, RS-485, CAN, Modbus 🌟 High-Speed: USB, USB-C, Ethernet, HDMI 🌟 Wireless: BLE, Wi-Fi, RF matching, antenna layout 🌟 Power: Buck/boost, LDOs, charging, battery protection, BMS 🌟 Analog: ADC/DAC, analog front ends, sensor conditioning 🌟 Tools: KiCad, EasyEDA, STM32CubeIDE, ESP-IDF, VS Code ━━━━━━━━━━━━━━━━━━━━ PCB ENGINEERING ━━━━━━━━━━━━━━━━━━━━ I pay particular attention to: ✔ Power and ground distribution ✔ Return paths and decoupling ✔ Current-carrying trace sizing ✔ Differential pair routing ✔ Controlled impedance ✔ Length matching ✔ RF keep-outs and antenna regions ✔ EMI/EMC-aware layout ✔ Mechanical constraints ✔ DFM and assembly requirements The goal is not just a PCB that passes DRC, but one designed to reduce problems during bring-up, testing, and manufacturing. ━━━━━━━━━━━━━━━━━━━━ MANUFACTURING & PRODUCTION ━━━━━━━━━━━━━━━━━━━━ I can prepare: ✔ Gerber RS-274X files ✔ Excellon NC drill files ✔ BOM with sourcing support ✔ Pick-and-Place / CPL files ✔ JLCPCB / PCBWay assembly packages ✔ 3D STEP models ✔ DFM checks ✔ PCB revisions after testing ✔ Editable schematic and PCB source files Before release, I also review the final fabrication outputs instead of relying only on the PCB editor. ━━━━━━━━━━━━━━━━━━━━ TYPICAL PROJECTS ━━━━━━━━━━━━━━━━━━━━ 🚀 Embedded controller boards 🚀 IoT and connected devices 🚀 Battery-powered electronics 🚀 Wearables 🚀 Sensor and measurement systems 🚀 Industrial control electronics 🚀 PCB redesigns and revisions 🚀 Hardware + firmware integration 🚀 Prototype-to-manufacturing development ━━━━━━━━━━━━━━━━━━ Have an Existing Design or Concept? ━━━━━━━━━━━━━━━━━━ Send over your schematic, PCB files, block diagram, or specs. I'll review your design, highlight the top signal integrity/DFM risks, and lay out a clear roadmap to get your hardware built and running smoothly.