Division of the electromagnetic spectrum:
1. Very low frequency (VLF) 3 kHz~30 kHz, corresponding to the wavelength of electromagnetic waves is very long wave 100 km~10 km;
2. Low frequency (LF) 30 kH...
(2006-06-28 08:34:42)A recent annual report on the global entertainment and media industry released by PricewaterhouseCoopers pointed out that the global entertainment and media industry is entering a...
[size=4]With the rapid development of mobile phones, electronics, and communications industries, the PCB industry has also grown rapidly. People have higher and higher requirements for the number of l...
[i=s]This post was last edited by zengyi703 on 2020-3-14 11:38[/i]I was bored at home during the epidemic, so I made a small board that supports MicroPython. Basic hardware functions:
1. The microcont...
Please guide me what is the reason
Input 24V2A, output 5V800MA, 3.3V500MA and 4.6V800MA. After batch production, it was found that some DCDC chips were damaged after a period of use, ranging from seve...
Recently, Phoenix Optics explained the termination of the major asset reorganization. It said that the current business direction of the listed company is optoelectronic products and solutions for Io...[Details]
This year's Redmi K50 series, relying on the Dimensity 8100 and 2K high refresh screen, has almost achieved "incomparable success" in the same range and is very popular among users. However, a...[Details]
Some netizens discovered that vivo has a new 5G model V2185A that passed the national 3C quality certification on Monday. It is equipped with a V8060L0A1-CN charger (the same model as the vivo ...[Details]
In August 2021, BYD Semiconductor's issuance and listing review was forced to be suspended because the law firm it hired was investigated by the China Securities Regulatory Commission. Fortunately,...[Details]
Common control schemes, such as current mode control and peak current limiting, are impossible without real-time information from traditional AC current sensors. Designers typically use transformers, ...[Details]
H.264 is a new digital video coding standard developed by the Joint Video Team (JVT) of ITU-T's VCEG (Video Coding Experts Group) and ISO/IEC's MPEG (Moving Picture Coding Experts Group). It is bo...[Details]
On April 23, Mao Fei, deputy general manager of Sichuan Development (Holdings) Co., Ltd., and his delegation visited the Chuanwei Lianjie Base for inspection and exchange. Liu Qiang, deputy secreta...[Details]
The three major A-share indices closed up slightly today, with the ChiNext Index up nearly 1%. The two markets had a total turnover of about 850 billion yuan, with most industry sectors closing up, a...[Details]
Is the prospect of Facebook's cryptocurrency Libra worrying? Foreign media reports pointed out that Visa, MasterCard, the two major credit card issuers, and other institutions may have to reconsider ...[Details]
1 Balanced demand background
Because circuit board materials show high loss at high frequencies, the current high-speed serial bus speed continues to evolve, making popular circuit board materials ...[Details]
I majored in electronic information, undergraduate. When I graduated, foreign companies were very popular. They had advanced management systems, modern electronic equipment, and very high benefits. ...[Details]
What
can metal detector security door equipment detect ? Simao explains it to you. In recent years, the security inspection industry, including metal detectors, security gates, and X-ray machines...[Details]
MIPS Technologies, Inc., a provider of industry-standard processor architectures and cores for digital home, network and mobile applications, announced that network camera manufacturer Axis Communi...[Details]
In order to facilitate the agricultural machinery operator to quickly and accurately know the depth of the machine operation, a field ultrasonic ranging method based on NEC single-chip microcomputer ...[Details]
A soft starter is a device used for starting and running control of motors. It controls the starting current and voltage of the motor to achieve smooth starting and soft stopping of the motor, redu...[Details]