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//Sub-function delay_1ms(1) You can write it yourself
#define scan_key_port P3
uchar key_scan()
{
uchar sccode,recode;
uchar key_value;
scan_key_port=0xf0; /* Send all "0" row scan ...[Details]
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Recently, Tsinghua Unigroup released its 2019 financial report. The report shows that in 2019, Tsinghua Unigroup achieved a main business income of 76.656 billion yuan, a year-on-year increase of 16....[Details]
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Experts say a curved screen isn't just cool, it also makes the phone more durable and less likely to break if dropped. Image source: Mobiles.co.uk website The global technology community is using v...[Details]
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With the development of computer technology and communication technology, buildings are becoming more and more intelligent. The intelligent meter reading system for residential buildings is indispe...[Details]
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Compared with traditional transformers and shunts, power supply voltage sensors have the advantages of high accuracy, fast response, good linearity, wide bandwidth, strong overload and no loss of me...[Details]
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Analog-to-digital converters are an important interface between the analog and digital worlds. A/D converters convert real-world analog signals into digital bit streams for processing, transmission...[Details]
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1 Introduction
Single-phase sine wave inverters are widely used in industrial production. Once a fault occurs, it will not only affect the normal production, but also cause serious economic losses. ...[Details]
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Internal data memory lower 128 cells The internal RAM of the 8051 microcontroller has a total of 256 units. These 256 units are usually divided into two parts according to their functions: low 128 un...[Details]
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Colleges and universities are units with many departments and divisions, and there are many school activities. The activities of answering questions are exciting and interesting. There are few answer...[Details]
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1 Hardware circuit design (picture)
System working process:
The single-chip microcomputer AT89C51 collects various information of the equipment, which can be pressure, flow, tempe...[Details]
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On the 10th, Cooper Energy's Dongguan Qishi Industrial and Commercial and Grid-Level Energy Storage System Production Base opened grandly. As the red curtain was unveiled, this large-scale modern e...[Details]
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1. Overview:
This article introduces several control methods to improve the shortcomings of the previous SPWM unipolar and bipolar control methods.
2.Unipolar alternating control:
...[Details]
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On July 30, Shenzhen Xunjiexing Technology Co., Ltd. (hereinafter referred to as "Xunjiexing") issued its first public offering of shares and planned to be listed on the Science and Technology Innova...[Details]
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Recently, Beijing's local standard "Electric Vehicle Charging Station Operation and Management Specifications" was published on the website of the Market Supervision Bureau and will be officially i...[Details]
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The wiring method of the servo motor encoder plug wire is crucial to ensure the normal operation and precise control of the servo motor. This article will introduce the wiring method of the servo m...[Details]
PCB Design
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