In the Arduino ecosystem, the PCB design of shields is a professional task that requires comprehensive consideration of multiple factors. This article will detail the key points in the design of Arduino shields from a technical perspective of PCB layout design.1. Physical Dimensions and Mechanical ConstraintsStandard Size SpecificationsThe Arduino shield must strictly adhere to the … Read more
modetest -M rockchip ❝ When connecting an EDP interface display to the motherboard, if the error “LT CR Failure” (Link Training & Clock Recovery failure) occurs, the following are possible causes and solutions: 1. Core Reasons for Link Training Failure Poor Signal Integrity The EDP signals (differential pairs) from the motherboard to the display may … Read more
I have a demo board with an integrated MOSFET Buck power supply. Although the circuit is simple, the layout is quite textbook-like. Here are some key design points of this circuit: 1. Phase Plane The phase plane, which is the plane connecting the inductor and the power IC, is the dirtiest signal (high current, high … Read more
Route according to the 50-ohm impedance line width, try to route from the center of the pad, keeping the lines straight and preferably on the top layer. When a bend is necessary, make it at a 45-degree angle or as an arc, preferably bending near capacitors or resistors. If routing meets the matching requirements of … Read more
[Fundamentals] 3W Principle Power Supply Management and Plane Segmentation About Dead Copper (PCB Islands) Where is the Reference Plane for Routing? How to Quickly Estimate PCB Trace Resistance: Square Statistics [PCB Fabrication and Materials] Basic Knowledge of PCB Fabrication Classification of Substrate Materials for Printed Circuit Boards Classification and Selection of PCB Materials Differences in … Read more
Editor’s Note: This article is written by two experts from Luxshare, Chuck Grant and Andrew Kim. It provides a comprehensive overview of intra-pair skew in 224G high-speed cables, validated through simulations and measured data under various bending and thermal conditions, discussing how to control skew and its impact on error rates during design, production, and … Read more
1. Fatal Fault on Site A certain automotive welding workshop, Siemens S7-300 PLC (6ES7 315-2EH14-0AB0) suddenly reported error 0x1A3B, with 32 DP slaves going offline collectively. The monitoring screen displayed:<span>[2023-05-12 03:15] PROFIBUS-DP System Fault: Telegram timeout (Slave 17-32)</span> The signal amplitude was only 0.8Vpp (standard requirement ≥1.5Vpp), with a rise time jitter of 35ns (IEC61158 … Read more
Application of Real-Time Oscilloscopes in New Generation Optical Interface Time Domain Testing Introduction: When it comes to time domain testing of optical interface metrics, engineers often mention the sampling oscilloscope. This is because sampling oscilloscopes have unparalleled advantages in signal integrity: high bandwidth, low noise, and minimal quantization error (high vertical resolution). However, the downside … Read more
In modern high-frequency microwave circuit design, vertical interconnect transition structures serve as critical paths for signal transmission between different layers of PCBs, and their performance directly affects the overall properties of the system. As communication systems advance into the millimeter-wave frequency band, traditional via structures can no longer meet the integrity requirements for high-frequency signals. … Read more
Abstract: With the increasing demands for signal transmission rates or resolution in fields such as wireless communication, radar, satellite communication, and optical communication, the modulation schemes used have become increasingly complex, and the signal bandwidth has widened. Modern real-time oscilloscopes, due to advancements in chip and material technology, can now provide real-time measurement bandwidths of … Read more