I just deduced the schematic diagram of a 5-port Ethernet switch based on the actual device. The main chip is DM9081. It is in PROTEL99SE format. [[i] This post was last edited by Simon on 2009-5-12 1...
Interrupts are a major feature of the MSP430 microprocessor. Effective use of interrupts can simplify programs and improve execution efficiency.
MS430 has many interrupts, and almost every peripheral ...
When debugging the 5509A program, I found that I could not connect to the emulator, but I could do it by changing the board. It took me a while to solve this problem. I recorded the test process and s...
:) It's my first time to use STM32, and there are so many registers that I feel overwhelmed. Today, I was bored, so I sorted out the RCC register group, which has 10 registers in total. Although I did...
Hello everyone: I used the AD633 multiplier to make an analog phase-detection circuit, multiplying the two sine waves X and Y, and getting the following oscilloscope waveform at the OUT end. The outpu...
With the rapid development of science and technology, especially the widespread application of digital technology and various ultra-large-scale integrated circuits, electronic equipment, especially...[Details]
With the rapid development of urban economy, elevators are increasingly used as a vertical transportation tool. However, elevator fault detection and maintenance, especially the role of elevator remot...[Details]
LED is the abbreviation of light emitting diode, which is an electric light source made of semiconductor technology. The core part of LED is a chip composed of P-type semiconductor and N-type semi...[Details]
1 Introduction
There have been many studies on the detection and protection of power grid short circuit and line fault. The short circuit, overload and overvoltage protectors on the market have ...[Details]
Single-chip microcomputers are widely used because of their small size, powerful functions and low price. This article introduces the method of designing a micro electronic piano using the AT89C51 sin...[Details]
introduction
MAX6636 is a multi-channel precision temperature monitor that can not only monitor local temperature, but also connect up to 6 diodes externally. Each channel has a programmable...[Details]
At very low temperatures, certain metals and alloys lose their resistance to electric
current
and become
superconductors
. Two parameters that are often measured are the transition ...[Details]
It is well known to automotive suppliers that automakers are demanding more from their supply base. For connector suppliers, this means stricter requirements for product performance, stability and ...[Details]
The era of mobile access to the Internet has arrived, and it will rapidly change the business and infrastructure needs of mobile operators under a whole new trend of requirements. We need 4G LTE to...[Details]
With the rapid development of the national economy, lifting and hoisting operations are used more and more frequently and widely in various fields of economic construction. China has continuously expl...[Details]
Every time I go home and walk up the stairs, I am always scared. The corridor lights are often broken, and no one changes the bulbs, or they are not smart enough and need to be operated manually. E...[Details]
The capacity of a battery depends on the amount of charge and discharge, in addition to some factors of the battery itself. Obviously, if the charge and discharge of the battery can be recorded all...[Details]
IntroductionLED
billboards are a kind of information display terminal for the public, which has a wide range of civil and commercial values. However, the information displayed on most LED bil...[Details]
As a new type of centralized and decentralized elevator control system, serial communication has been widely used in China. Compared with the previous centralized and unified control system, each s...[Details]
Reliability and real-time performance are the basic requirements for control systems. Initially, motor control used analog circuits with discrete components. With the advancement of electronic tech...[Details]