When designing PCBs, the design requirements for common hardware interfaces are crucial for ensuring circuit performance and stability. Below are some common hardware interface PCB design requirements: 1. USB Interface Design Requirements ① Total length control: Keep it within 1800 mils as much as possible. ② Differential pair characteristic impedance: 90Ω. ③ Power pin trace … Read more
1: Drawing Arduino Circuit Boards (Schematic Library, PCB Library, Schematic, PCB Drawing) 1. Drawing Schematic Library (Use existing libraries, or create your own) [SCH Library] Here is an example Add sub-file: Select -> Tools -> New Component Method 1: Draw one by one Below are some examples and effect images ATMEGA328P-AU CH340G LM358 USB-B PT … Read more
Hello, everyone! I am Weiwei, and today marks the 47th day of my continuous sharing. Yesterday, I shared whether a separate follow-up is necessary and some simple processes. Today’s topic is: Why must the PCB industry establish a follow-up system? What is the importance of follow-up?. Common issues: From a sales perspective, if follow-up is … Read more
1. What is a Reference Point (Mark Point)? Mark point is also known as a reference point or optical positioning point, which is used as a positioning point by pick-and-place machines. Since PCBs provide a common measurable point for all steps in the assembly process during mass production, every device used in assembly can accurately … Read more
1. Determine the Plan and Purpose Hello everyone, today the miniaturized development board has arrived, and we are starting the arrival inspection task. The requirements are as follows: [Notes] STM32F4 + FT232H High-Speed Acquisition Development Board Design Draft Objective: STM32F4 Development Board 01. High-speed transmission testing, and reliable verification; 02. ADS1220 driver verification and debugging; … Read more
The release of the “Opinions” marks a strategic shift in China’s healthcare system from a “city-centered” approach to a “grassroots-centered” one. For practitioners, this represents both a challenge—shifting from a passive waiting for patients to an active ecosystem building—and an opportunity, as policy benefits are accelerating towards grassroots levels. There are significant market gaps in … Read more
This public account is hosted byYunnan Provincial Health Commission. If you have not followed yet, please click the blue “Yunnan Healthcare Reform” above to follow. Author Ran Jianyong Jinghong Maternal and Child Health Hospital Yunnan Healthcare Reform News Recently, the Party Branch of Jinghong Maternal and Child Health Hospital, in collaboration with the Party General … Read more
In 2022, a research team from the University of California, Santa Barbara conducted an experiment involving over 500 participants who filled out a questionnaire. The results revealed that 96% of people admitted to lying, with 44% doing so to “promote themselves” and 36% to “protect themselves.” Interestingly, the ability of children to lie increases exponentially … Read more
The first productive force in the age of AI robots has transitioned from technological power to aesthetic appreciation and then to creative power. Since the Industrial Revolution and the technological explosion, science and technology have been the primary productive forces. From the information revolution to the explosion of artificial intelligence, aesthetic appreciation has increasingly become … Read more
Comprehensive report from Electronic Enthusiasts Network, at this year’s CES 2025, TCL unveiled the world’s modular AI companion robot——AiMe. The reason it is called modular is that it features a unique modular design, allowing the entire product to be divided into three parts, namely the main robot, an auxiliary mobile device, and a mini interactive … Read more