I have been engaged in embedded software development for more than 10 years. I like technical development, and I have not made any efforts to develop my career in the direction of management. I am als...
Dear experts, it is said that when the positive and negative inputs of an op amp are equal, the output is 0. Does this 0 refer to the middle point of the positive and negative power supplies, or the a...
[i=s]This post was last edited by 不足论 on 2020-1-19 16:56[/i]Continued from the previous article:
https://en.eeworld.com/bbs/thread-1066428-1-1.html
I have written a year-end summary on EEWorld in rece...
In communication systems, such as transmitter testing, the power level of the transmission may range from a few watts to hundreds of watts or even thousands of watts. Such a large power signal must be...
Radio waves need to be transmitted, and the frequency must be high enough, such as 900MHZ and 1800MHZ of GSM. The frequency of sound is very low, only 20HZ-20KHZ. This frequency signal cannot be trans...
Xilinx's stock price fell rapidly after it released its fourth quarter and fiscal 2019 annual report. Although revenue and EPS were above analysts' expectations, the guidance set by executives for th...[Details]
During MWC2019 in Shanghai on the 27th, a sentence in his speech by Yang Jie, chairman of China Mobile, "Starting next year, mobile phones that only support NSA will not be able to access the network...[Details]
Leica can be said to be synonymous with high-end cameras, and its cooperation with Huawei in recent years has also made it famous in mobile phone cameras. Last month, Sharp released the AQUOS R6 mo...[Details]
Today I will continue to play with the compilation and downloading of u-boot for the mini2440 development board. First of all, let me explain the background. I downloaded the mini2440 customized v...[Details]
SRAM Data Memory ATmega64 supports two configurations of SRAM data memory, see Table 1. Figure 9 shows the organization of the ATmega64 SRAM space. ATmega64 has more than 64 parallel units. For t...[Details]
In the past two hundred years, human beings have used coal, oil and natural gas as energy, which has increased productivity by nearly 200 times. However, fossil energy is gradually depleting, and pol...[Details]
TD-LTE is a key component of the "new generation of information technology", a pillar industry of the country's "12th Five-Year Plan". The development of TD-LTE will promote the development of mobi...[Details]
Linear regulators have long been widely used in the industry. Before switch-mode power supplies became mainstream after the 1960s, linear regulators were the foundation of the power supply industry...[Details]
The source program of the sending microcontroller is as follows: #include "ir_send.h" /*------------Initialize IO------------*/ void ir_init(void) { P2M0 = 0x80; //P2.7 strong push-pull ...[Details]
The foldable flagship has evolved comprehensively, Snapdragon 8+ helps vivo X Fold+ become even stronger
On September 26, vivo officially released the high-end version of the X Fol...[Details]
Since Hungarian engineer Otto Blathy invented the world's first prototype of an electric energy meter (watt-hour meter) in 1889, the electric energy meter has evolved over a century: from mechanica...[Details]
hardware design Simulation Figure 1: There are 8 temperature collection points in total, based on DS18B20, LCD1602 displays in polling mode programming #include AT89X52.h #include Intrins.h #de...[Details]
Project Overview
1.1 Project Background
An oscilloscope is an electronic measuring instrument that can display the dynamic waveform of a voltage signal. It can convert a time-varying volt...[Details]
1.
LED driver
General requirements
The arrangement of
LEDs
and the specifications of
LED light sources
determine the basic
driver
requirements. The main function ...[Details]
1. Introduction of the concept of counting
Let's start with counting votes: draw a "positive". This is counting. Counting routines can be seen everywhere in life. For example: the counter on...[Details]
Talking about work
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