Case studies and project archives for embedded hardware, firmware, control systems, robotics, and internship evidence.这里会持续整理项目背景、工程过程、技术栈、实验记录和可验证成果。
A compact hardware archive for a single-channel electromagnetic-lock power-management board, including the public logo image, schematic / PCB PDFs, BOM, Gerber archive, EasyEDA project, and component datasheets.单路电磁锁电源管理板的硬件档案页，公开展示 LOGO、原理图 / PCB PDF、BOM、Gerber、EasyEDA 工程和主要器件数据手册。
A larger Juanyun Technology project dossier that merges the ACUnit control platform, BaseUnit STM32 firmware, DHT11 / AM2302 breakout plan, smaller actuator archive, SOP material, and non-sensitive legacy hardware evidence into one public project page.卷云科技实习材料的大项目档案页：把外机控制平台、底座板 STM32 固件、DHT11 / AM2302 小板、执行器归档、硬件 SOP 和非敏感 legacy 硬件证据合并到一个公开项目中。
An archive-style project page for a sensorless PMSM FOC driver board line around STM32F4 and DRV8301, with selected manufacturing, EDA, STEP, datasheet, and source evidence published from the non-sensitive legacy folder.围绕 STM32F4 与 DRV8301 的无感 PMSM FOC 驱动板归档页，从非敏感 legacy 目录中发布筛选后的制造、EDA、STEP、数据手册和源码证据。
An internship archive rebuilt from Nanjing Turing AI Research Institute traces: Qt/C++ onboarding, Seamly2D modification, CMake build reasoning, and Windows/macOS release packaging.从南京图灵人工智能研究院实习痕迹整理出的公开项目页：Qt/C++ 入门、Seamly2D 二次开发、CMake 编译理解，以及 Windows/macOS Release 打包流程。
A first internship learning record around STM32F103C8T6, Keil MDK, GPIO, EXTI, timers, PWM, ADC, UART, sensors, and a small metro-environment monitoring demo.大学以来第一次实习留下的 STM32 入门记录：从 Keil MDK、GPIO、中断、定时器、PWM、ADC、串口，到一个地铁环境监测小综合 demo。
A legacy cooling prototype that connected 3D printed air-channel parts, fan selection, ESP32 PWM control, and a Windows desktop demo, with selected PCB, source, and fabrication evidence published after pruning noisy project output.一个早期压风式散热器原型，把 3D 打印风道、风扇选型、ESP32 PWM 控制和 Windows 桌面端演示串在一起；页面保留筛选后的 PCB、源码和制作文件，同时排除安装包、依赖和构建输出。