Early in the morning, I received a call from a customer saying that the display on their device, which was working fine last night, did not display anything when they turned on the machine this morning. The customer quickly sent me a photo: This display is a Mitsubishi M70. After confirming that the screen was … Read more
1. What is the basic principle of I2C communication?A: I2C adopts a master-slave communication mechanism. The master device initiates and controls the communication, while the slave device responds to the master’s requests. 2. What are the key features of I2C communication?A: Supports multi-master and multi-slave architecture; requires only two communication lines; supports different transmission rates. … Read more
September 16, 2025 1. Introduction: Why do others print the same model like a “work of art”, while yours looks like a “defective product”? Recently, someone complained to me: “I spent 5000 yuan on a resin printer, but the anime figurines I printed either have missing arms and legs or a rough surface, while the … Read more
“Is knowing 200 Linux commands considered mastery?” Many people fall into the “command trap” when learning Linux, but memorizing commands is like memorizing a car manual; it doesn’t mean you can drive on mountain roads or understand how to fix an engine. At best, it means you can “use a tool.” True mastery of Linux … Read more
😱 Conclusion First No antenna installed = Motherboard at full power “roaring” = 2.4GHz chaos = Bluetooth dies instantly. 📉 A Real Tragedy Fan @A-K: “Win11 + Sony WH-1000XM4, within 3 meters the sound is choppy like a PowerPoint presentation, changed drivers, reinstalled the system, even bought a new headset, 799 yuan wasted. Finally, the … Read more
Cover Image A mushroom photographed on a rainy day in Greece by a National Geographic photographer. Main Text When debugging a board, what is your troubleshooting approach when the debug serial port is not functioning? Seemingly simple serial communication actually involves an entire chain: from the serial software on the PC, USB to serial modules, … Read more
Common Linux Errors and Their Solutions In Linux system administration, encountering various errors is a norm. These errors may arise from permission issues, configuration errors, resource shortages, or hardware failures. Timely diagnosis and resolution of these errors can help administrators maintain system stability and performance. 1. Introduction As an open-source operating system, Linux is widely … Read more
📱 Douyin Command One-Click Unlocking Guide | A step-by-step guide to mastering popular content in just 2 minutes! 🔍 1. Command Parsing Principle Douyin commands (e.g., <span>http://v.douyin.com/ip</span>) are “shortcut channels” provided by the platform, enabling cross-platform redirection through encrypted short links. Whether you receive a link shared by a friend or a text command for … Read more
Vehicle Information: Mileage 5497K, first maintenance completed on schedule. Fault Phenomenon: Multiple warning lights on the dashboard illuminate, reporting DTCs as shown in Table 1. The dealership cleared the DTCs and conducted related tests, but the fault did not reappear during the test drive. After several days of use by the owner, the fault reoccurred. … Read more
Overview Programmable Logic Controllers (PLCs) are core components in modern control systems, and their stable operation is crucial for industrial automation. This article aims to provide a comprehensive PLC troubleshooting guide, from understanding the basic components of a PLC to mastering fundamental troubleshooting steps and techniques, and delving into advanced diagnostic methods. This will help … Read more