I copied the PCB of one board onto another and there are a lot of circles at the connections. What does this mean? Will it affect the finished board if I ignore it?...
[color=rgb(0, 0, 0)][font=SimSun][size=12pt]Pull-up resistor: [/size][/font][/color][color=rgb(0, 0, 0)][font=SimSun][size=12pt]1. When the TTL circuit drives the COMS circuit, if the high level outpu...
The English abbreviation of television monitoring system is CCTV (closed-circuit television). Closed-circuit television monitoring system is a comprehensive security system across industries. The syst...
I built a program and downloaded it to LF2407A using "load program" in file and flash utility, without setting the csm password. It runs fine under ccs, but not under the stand-alone version. I checke...
Dear engineers: How big is the ripple (or noise) of a switching power supply? For example, how big is the noise of a 27V 5.6A CE-certified power supply? How can I filter out the noise on the power sup...
WiMax technology needs to demonstrate its advantages in specific application scenarios in order to gain market recognition, which requires application testing to measure system performance para...[Details]
Due to the needs of medical development, in many cases, general thermometers can no longer meet the requirements of fast and accurate temperature measurement, such as measuring human body temperature ...[Details]
1. What is fading?
In terms of scope, fading can be roughly divided into three types: large area fading, small area fading and indoor fading. As shown in Figure 1, large area fading refers t...[Details]
With the advent of the new economic era represented by the Internet, PCs have lost their former glory, and smart 3C products (Computer, Communication and Consumer) will set off a new wave. As one o...[Details]
Nowadays, the phenomenon of using cloned taxis and trucks for operation is becoming more and more serious. The so-called cloned car is one or several unlicensed vehicles that are used to copy anoth...[Details]
FSK (Frequeney-Shift Keying) uses carriers of different frequencies to transmit digital signals. FSK signals have the advantages of strong anti-interference ability and long transmission distance, and...[Details]
The growing global interest in green power has added new variables to the design of power supplies and power adapters. Designers must not only traditionally consider the design specifications requi...[Details]
Prisons are an important part of the national judicial organs, shouldering the important mission of enforcing laws and disciplines and educating and reforming. The safety of prisons is related to t...[Details]
As modern cities develop towards multi-functionality, urban layouts become increasingly complex, with hundreds, even thousands of ground monitoring points. To ensure that functional departments can...[Details]
The relationship between time and frequency
There is no conceptual difficulty in understanding what happens when a steady-state DC signal is applied to a voltmeter. However, if the signal ...[Details]
With the deepening of energy crisis and environmental pollution, the research and utilization of solar energy has received widespread attention. Solar energy is an inexhaustible renewable energy so...[Details]
Part 1 Current status of electricity metering in various places
Current status of electricity metering
a) Power companies still mainly use mechanical energy meters and low-cost e...[Details]
introduction
In an increasingly information-based society, computers and networks have fully penetrated into daily life. For individuals, what is needed is not just documents placed on the...[Details]
Today's mobile phones and other portable devices are becoming smaller and thinner, while integrating more and more new functions or features, such as large-size displays, high-resolution camera mod...[Details]
Although the live broadcast satellite has only been launched for more than 8 months, the market growth rate and the momentum of development have greatly exceeded the expectations of industry inside...[Details]
Analog electronics
京公网安备 11010802033920号
EEWORLD
