Hi, I'm Charles, an Embedded Systems Engineer specializing in PCB design, embedded firmware, and hardware development. I design reliable electronic products from concept to production using Altium Designer, KiCad, and EasyEDA. My expertise includes STM32, ESP32, AVR, ARM Cortex, FreeRTOS, IoT, power electronics, DC-DC converters, SMPS, BLE, Wi-Fi, and custom embedded solutions. I focus on clean PCB layouts, optimized firmware, and manufacturable designs that deliver performance, reliability, and long-term value. Let's build your next hardware product.... Lee más