OpenCV Python 轮廓与矩阵实战：NumPy 矩阵操作 + findContours 详解
深入理解 OpenCV Python 中的图像矩阵操作——NumPy 创建、赋值、通道分离，以及 cv2.findContours 轮廓检测的完整参数解析与实战对比。
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OpenCV Python 入门完全指南：读取、显示、保存图片与 Jupyter 配置
OpenCV Python 入门基础完全教程：cv.imread 读取图片、cv.imshow 窗口显示、cv.imwrite 保存、Matplotlib 在 Jupyter notebook 中显示、图像属性查看。从零开始学习 OpenCV Python 基础操作。
OpenCV Python 绘图完全指南：线、圆、矩形、椭圆、多边形、文字
全面学习 OpenCV Python 绘图函数：cv.line、cv.circle、cv.rectangle、cv.ellipse、cv.polylines、cv.arrowedLine、cv.putText、cv.drawMarker 等。包含完整代码示例、参数详解和实战技巧，一篇搞定 OpenCV 2D 绘图。
OpenCV Python 图像处理完全指南：色彩、通道、直方图、形态学、遮罩
全面学习 OpenCV Python 图像处理核心操作：色彩空间变换(cv.cvtColor)、通道操作、图像遮罩、直方图、形态学操作(morphologyEx)、翻转、缩放、伽玛校正、均值与标准差。完整代码示例与实战技巧。
OpenCV Python 图像滤波完全指南：高斯、中值、双边、Gabor、傅里叶变换
全面学习 OpenCV Python 图像滤波技术：GaussianBlur、medianBlur、bilateralFilter、Gabor 滤波器、自定义滤波器、傅里叶变换(DFT)、Sobel 边缘检测、阈值处理。包含完整代码示例与对比分析。
PCB 设计完全指南：从 KiCad 入门到四层板信号完整性实战
一篇讲透 PCB 设计全流程：用 KiCad 从零绘制原理图、分配封装、布局布线、导出 Gerber，再到四层板层叠设计、阻抗控制、串扰抑制与电源完整性实战，附常见问题排查与打样清单。
传感器 DIY 实战：BH1750 自动调光 + HX711 高精度电子秤制作
两篇传感器实战合二为一：BH1750 数字光照传感器实现智能自动调光系统，HX711 24 位 ADC 搭配称重传感器制作 0.1g 精度电子秤。含完整接线图、Arduino 代码、校准流程与常见问题排查，总成本不到 100 元。
Thread 协议与物联网安全：Mesh 网络搭建 + 固件加固实战
从零搭建 Thread Mesh 网络并加固 IoT 设备固件安全——涵盖 OpenThread 边界路由器配置、节点入网通信、ESP32 Secure Boot v2 与 Flash 加密全流程
物联网数据可视化：Grafana + InfluxDB 搭建实时监控大屏
从零搭建 IoT 实时监控大屏，ESP32 传感器数据经 InfluxDB 时序数据库存储，Grafana 可视化展示，完整实战教程。
UWB 精准定位实战：DW3000 室内厘米级追踪系统
从零开始用 ESP32 + DW3000 模块搭建室内厘米级定位追踪系统，涵盖 DS-TWR 双向测距原理、三边定位算法、卡尔曼滤波平滑和精度优化技巧。
Complete Guide to Motor Control: Stepper/Servo/DC Motors + Closed-Loop Control in Practice
From A4988 stepper motors, SG90/MG996 servos, and L298N DC motor PWM speed control, to encoder-based closed-loop PID control and solar charge controllers — everything you need to know about embedded motor control in one guide.
OpenCV Python Contours and Matrices Practice: NumPy Matrix Operations + findContours Detailed Explanation
Deep understanding of image matrix operations in OpenCV Python - NumPy creation, assignment, channel separation, and complete parameter analysis and practical comparison of cv2.findContours contour detection.
The Complete Guide to OpenCV with Python: Reading, Displaying, Saving Images & Jupyter Setup
A complete beginner's tutorial on OpenCV Python basics: cv.imread for reading images, cv.imshow for window display, cv.imwrite for saving, Matplotlib in Jupyter notebooks, and inspecting image properties. Learn OpenCV Python fundamentals from scratch.
Complete Guide to OpenCV Python Drawing: Lines, Circles, Rectangles, Ellipses, Polygons, and Text
Learn OpenCV Python drawing functions comprehensively: cv.line, cv.circle, cv.rectangle, cv.ellipse, cv.polylines, cv.arrowedLine, cv.putText, cv.drawMarker, and more. Includes complete code examples, detailed parameter explanations, and practical tips — everything you need for OpenCV 2D drawing in one article.
The Complete Guide to Image Filtering with OpenCV Python: Gaussian, Median, Bilateral, Gabor, and Fourier Transform
A comprehensive guide to image filtering in OpenCV Python: GaussianBlur, medianBlur, bilateralFilter, Gabor filters, custom kernels, Fourier Transform (DFT), Sobel edge detection, and thresholding. Includes full code examples and comparative analysis.
PCB Design Complete Guide: From KiCad Beginner to Four-Layer Board Signal Integrity Practice
A comprehensive guide to the entire PCB design process: using KiCad to draw schematics from scratch, assign footprints, layout and routing, export Gerber files, then dive into four-layer board stackup design, impedance control, crosstalk suppression, and power integrity practice, with common troubleshooting and prototyping checklists.
Sensor DIY in Practice: BH1750 Auto-Dimming + HX711 High-Precision Scale Build
Two sensor projects combined: BH1750 digital light sensor for an intelligent auto-dimming system, and HX711 24-bit ADC paired with a load cell to build a 0.1g-precision scale. Includes complete wiring diagrams, Arduino code, calibration procedures, and troubleshooting tips — total cost under ¥100.
Thread Protocol and IoT Security: Mesh Network Setup + Firmware Hardening Practice
Build a Thread Mesh network from scratch and harden IoT device firmware security - covering OpenThread border router configuration, node network communication, ESP32 Secure Boot v2 and Flash encryption full process
IoT Data Visualization: Building a Real-Time Monitoring Dashboard with Grafana + InfluxDB
Build an IoT real-time monitoring dashboard from scratch — ESP32 sensor data stored in InfluxDB time-series database and visualized with Grafana. A complete hands-on tutorial.