The above picture is the optocoupler input circuit that I often use. I have never studied it before.
Question 1: What is the purpose of the 300 ohm resistor R2 in the circuit?
Question 2: After the sw...
I recently looked at the arm7 code and saw the interrupt function void _irq IRQ_Expection(void). What I want to ask is what is this "_irq"? ? ? ? Has it been defined before? ? ? ?...
[font=黑体][size=3] Waiting online, may I ask how to modify the circuit in the figure to make it output a sine wave (waveform range 700~800hz) [/size][/font] [font=黑体][size=3] condition, use 555 generat...
The system I designed in the project needs to be updated online. It is a DSP-based system. That is, the algorithm program and parameters in the configuration can be updated through the host computer t...
Original address: [url]http://cn.tycc.cn/news/guoneixinwen/2014-09-27/189.html[/url] Tongyu Communication is Huawei's antenna supplier, with great technology. [table=98%] [tr][td] 1. Introduction Comp...
Recently,
Xpeng Motors and Xinlian Integrated Circuit jointly announced the mass production of China's first hybrid silicon carbide product.
Designed and developed by Xpeng Motors and joint...[Details]
Common Mode Semiconductor has officially released its latest generation of power management ICs—the GM6506 series. This fully integrated high-frequency synchronous rectification step-down p...[Details]
On August 21st, Zhiyuan Robotics revealed at its first partner conference that it expects shipments to reach thousands of units this year and tens of thousands next year. The company hopes to reach...[Details]
With the rapid development of electric vehicles in my country, people are beginning to pay attention to the issue of radiation from electric vehicles. We all know that mobile phones emit radiation,...[Details]
Electric vehicles are now widespread, but they've brought with them a host of problems, the most prominent of which is charging. Small electric vehicles (EVs) are a new form of transportation in a ...[Details]
The 2025 China International Automotive Testing Exhibition will be held at the Shanghai World Expo Exhibition and Convention Center from August 27 to 29, 2025.
Clacton Seafront, UK, ...[Details]
In the field of intelligent driving, regulations are becoming increasingly stringent, and the technical threshold continues to rise. Especially after the traffic accident in March 2025, the Ministr...[Details]
In daily life, when we purchase a transformer, we are faced with the installation and wiring procedures. Generally speaking, large transformers such as power transformers are equipped with speciali...[Details]
Speaking of the problem of vehicle spontaneous combustion, whether it is a pure electric vehicle or a fuel vehicle, there will be incidents of spontaneous combustion. For the same spontaneous combu...[Details]
Civilian internal combustion engines operate in the range of approximately 1000-4000 rpm. This results in the engine's kinetic energy being ineffective at low or high rpm, making starting difficult...[Details]
New version helps developers build secure and trustworthy embedded systems
Shanghai, China—August 21, 2025—
QNX, a division of BlackBerry Ltd., today announced the release of QNX...[Details]
introduction
In today's busy society, people experience chronic high stress, which in turn poses a significant threat to our health. Therefore, effectively relieving stress has become a pr...[Details]
With the improvement of China's supporting infrastructure and the accumulation of technology and capital, demand for industrial automation and intelligent applications of machine vision technology ...[Details]
1. Static Balance
Static balancing is performed on one correction surface of the rotor. The remaining unbalance after correction is used to ensure that the rotor is within the specified range ...[Details]
Currently, PLCs are widely used in various industries, including special machine tools, machine tools, control systems, building automation, steel, petrochemicals, electricity, building materials, ...[Details]
Analog electronics
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