01 Power Layout and Wiring Digital circuits often require non-continuous current, which can cause surge currents in some high-speed devices. If the power routing is long, the surge current can lead to high-frequency noise, which can then couple into other signals. In high-speed circuits, parasitic inductance, parasitic resistance, and parasitic capacitance are inevitable, so this … Read more
The PCB routing work is like a connect-the-dots game for many engineers, and it can be a very tedious task. This is actually just a basic understanding; a proficient PCB design engineer can accomplish much more and solve many problems in product design. This article combines some design rules from major manufacturers and several technical … Read more
Click the above “Mechanical and Electronic Engineering Technology” to follow us Hey friends, today let’s talk about a topic that is both high-tech and close to our lives—PCBs (Printed Circuit Boards) in new energy vehicles. Sounds a bit fancy and mysterious, right? Don’t worry, we will slowly unveil its veil and see how this “unsung … Read more
Many people encounter the Raspberry Pi development board for the first time, typically the 4B model. Although this development board may not be as powerful as others, it excels in versatility and has an appropriate level of development difficulty. This article will discuss the key considerations for electronic engineers working with the Raspberry Pi development … Read more
Introduction I2C bus is a two-wire, bidirectional serial bus, particularly suitable for communication between ICs on or between boards. To meet system safety specifications, avoid noise signal interference during communication, and prevent damage to sensitive components, it is necessary to incorporate I2C isolator devices into the system. Today, I would like to recommend a domestic … Read more
RS-485, with its excellent ability to resist common mode noise, is suitable for long-distance signal transmission, especially widely used in industrial environments. This article introduces the working principle of RS-485 and the EMI risks it faces (electrostatic interference, electrical fast transient bursts, and surge voltage), and discusses several EMC solutions that help RS-485 cope with … Read more
Table of Contents 1. Key Technical Features of RS-485 2. Application Scenarios 3. Standards 4. Advantages of Using Differential Signal Transmission 5. Similarities and Differences Between RS-422 and RS-485 5.1 Differences in Bus Architecture 5.2 Differences in Common Mode Voltage Range 5.3 Differences in Input Impedance of Receivers 5.4 RS-485 Transceivers with Enable Pins 6. … Read more
CANopen is a high-level protocol based on CAN, which is widely used in various automation control systems. CANopen networks use twisted pair cables to transmit differential signals, but factors such as poor electromagnetic environment, non-standard wiring, and unreliable grounding in domestic industrial sites can directly affect communication quality and interfere with bus operation. To ensure … Read more
Product Operating Status: Operating voltage: DC12V. Testing USB playback. FM98.1 playback. Product Testing Issues: During testing, the product may restart and cannot revert to the original operating mode. Accompanied by howling noise. (Only meets 30mA A grade) Testing Standards and Grade Requirements: 200mA B grade, 100mA A grade, 60mA A grade, 30mA A grade. After … Read more
1. Product Description Some entertainment audio-visual vehicle machine, power interface DC24V input, multi-button operation control, multiple external IO output control interfaces, LCD screen display.The appearance of the operation panel is a full plastic shell, and the motherboard and LCD screen are fixed with metal screws.Static electricity test requirements contact discharge 8KV and air discharge 15KV. … Read more