[align=left]Many PCB engineers often draw computer motherboards and are very familiar with excellent tools such as Allegro. However, it is a pity that they rarely know how to control impedance and use...
[align=left] 1>[font=宋体]Project description: The DA outputs a sine wave signal to achieve a given (the frequency range of the sine wave is 50-500HZ), which is amplified by the subsequent analog circui...
When I was looking at a schematic diagram, I found that there was a 101 capacitor on the control pin of this chip. What is the function of this capacitor? Does it filter out high-frequency interferenc...
Looking at the examples in the start ware, when connecting to DMA and specifying the memory span, (unsigned int) image1+sizeof(image1)-2 is used. Does anyone know why 2 is subtracted here? In addition...
1. How many topics did you publish in EEWORLD in 2013? (Please click on My Topic - [/size][/font][/color][color=#06699][font=微软雅黑][size=3][url=https://bbs.eeworld.com.cn/my.php?item=threads][b]My Topi...
According to the website of China Consumers Association, with the continuous improvement of people's living standards and economic conditions, more and more consumers have begun to pay attention to an...
The rapid development of the Internet has realized high-speed information transmission and resource sharing, greatly facilitating people's lives. Embedded systems are widely used in various electr...[Details]
introduction
Since the beginning of the 21st century, the world of information has changed rapidly. Maybe a high-tech product will be released today and a better similar product will be releas...[Details]
introduction
my country has a vast territory and a large population. The scale of housing construction is huge, and the amount of residential construction is large and wide. It is still on t...[Details]
Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[Details]
introduction
Solar cells and LED lighting are typical applications of new energy and energy-saving and efficient technologies. Solar LED lighting uses solar cells to convert solar energy...[Details]
In public places such as schools, government agencies, factories and mines, as well as public corridors in residential areas, the phenomenon of long-burning lights is very common, which causes a h...[Details]
This paper establishes a fuel cell engine test platform based on the NI integrated hardware and software environment. This platform can realize the test and control of fuel cell engines and their a...[Details]
I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[Details]
Since the late 1990s, with the demand for higher system efficiency and lower power consumption, the technological update of telecommunications and data communication equipment has promoted the deve...[Details]
Distributed Wireless Communication System (DWCS) uses distributed antennas, distributed processing control, joint signal processing and other technologies to improve the system's spectrum efficie...[Details]
introduction
LEDs continue to gain popularity in automotive applications, thanks to their long lifespan and the flexibility they offer for body styling and interior design. Some may be surpris...[Details]
For battery-powered portable devices, in addition to breaking through the limitations of processing power, the performance of portable system power supplies also needs to be continuously improved. ...[Details]
Rated capacity refers to the maximum output power of the UPS (the product of voltage V and current A).
Usually, the UPS power supplies sold on the market are marked with "W" (watt) for smaller...[Details]
1. Tips for charging UPS for the first time
After purchasing a new UPS, plug the UPS into the 220V mains power grid and charge it for at least 12 hours to ensure that the battery is fully char...[Details]
PCB Design
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