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How to identify the positive and negative poles of packaged LEDs During the welding process of LED energy-saving lamps, we often encounter the problem of how to identify the positive and negati...[Details]
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Recently, SMIC released its third quarter financial report. At the same time, the company also said it would increase capital expenditures this year from US$5 billion to US$6.6 billion. When asked ...[Details]
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示波器基本上是一种图形显示设备,它绘制一个电信号的图形。在大多数应用中,这个图形显示信号怎样随时间变化,其中竖轴(Y)表示电压,橫轴(X)表示时间。显示辉度或亮度有时称为Z轴,如图2所示。在泰克DPO示波器中,乙轴可以用显示颜色等级表示,如图3所示。这个简单的图形可以告诉您与信号有关的许多东西,如:信号的时间值和电压值 ■Frequency of oscillation signal ■Th...[Details]
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1. Three elements of interference
In a single-chip microcomputer application system or other electronic equipment, the degree of interference a circuit is subject to is described by the following for...[Details]
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Rohde & Schwarz has performed 5G NR protocol conformance testing using the new R&S®CMX500 radio communication tester. The Global Certification Forum GCF accepted these 41 test cases defined by 3GPP i...[Details]
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1 Introduction The vortex gas flowmeter is a velocity flowmeter that is widely used in the production, storage and transportation of crude oil. Since it has no moving parts and has temperature and pr...[Details]
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IO port principle (P1 port is the simplest, so only P1 is introduced here, the principles of other IO ports are similar) P1 port principle It can be seen that the working principle of P1 port is re...[Details]
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The "Administrative Penalty Decision" (hereinafter referred to as the "Decision") issued by the Guangzhou Municipal Ecology and Environment Bureau shows that according to the 2018 environmental prote...[Details]
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Common Mode Semiconductor has launched the GM1203B series of high-precision, low-noise 3A LDO regulators. The GM1203B series combines low noise, high PSRR, and high output current capabilities, m...[Details]
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This article mainly introduces the problem of invisible faults in relay protection of power systems. By introducing the concept and characteristics of invisible faults, the harmfulness of invisible...[Details]
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According to the official news of HEVC Advance on August 17, some patent owners in HEVC Advance's HEVC/H.265 patent pool filed a patent lawsuit against Vestel Germany GmbH (hereinafter referred to as...[Details]
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I wrote a receiving program. The process is that the host computer sends to the single-chip microcomputer. If the received value is 1, an LED will be lit, and the received value will be sent to the se...[Details]
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Abstract: AD9066 is a dual 6-bit AD converter produced by the American AD Company. Its sampling rate is as high as 60MSPS. It can be used in broadcast sound reception, quadrature amplitude modul...[Details]
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Green travel has become the choice of more and more people, and the number of new energy vehicles has also exploded. New energy vehicles are easy to buy, but the charging problem has become a worry fo...[Details]
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The self-discharge of electric vehicle batteries refers to the gradual loss of charge inside the battery when it is not in use, thereby reducing the battery's available energy. This is an important...[Details]