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LED light source technology is becoming more mature, and the luminous lumens per watt are increasing rapidly, which has led to a gradual price reduction. The massive market of LED green lamps and the...[Details]
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(1) The power supply of the device under test must be disconnected. (2) All grounding terminals and lead connectors must be cleaned to ensure good contact. (3) The measuring instrument should be pl...[Details]
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Abstract: Aiming at the common problems of driving safety and passengers' difficulty in boarding in urban buses, a design scheme of remote monitoring system for buses based on GPS/3G technology is pr...[Details]
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Spring is the peak season for influenza, and children have weaker resistance than adults. Parents would definitely prefer a gentler approach rather than taking their children to queue up at the hospi...[Details]
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Working principle of power factor correction
1 Definition of power factor
Power factor (PF) refers to the ratio of AC input active power (P) to input apparent power (S). It can be express...[Details]
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Introduction
All cars use a fuel level sensor (FLS) to indicate the fuel level. However, different manufacturers often use a variety of different methods to measure the fuel level, such as res...[Details]
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Recently, big news has come out of the autonomous driving industry. The first is that Apple shelved and canceled all development plans for self-driving electric vehicles . This project, which took ...[Details]
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Recently, a new MIUI13 beta desktop has appeared in the Xiaomi App Store. It is expected to be the beta version of MIUI 13. The application uses new wallpapers and watermarks. The screenshots show ...[Details]
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1. What is SDIO interface 2. Characteristics of stm32 SDIO interface 3. SDIO block diagram of stm32 4. SDIO clock 5. SDIO commands and corresponding The command index is store...[Details]
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In the field of mobile product applications, NAND Flash devices have become a dedicated method for people to solve high-density solid-state storage. With the rapid development of information technolog...[Details]
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In modern industrial production, many high-power motors are used. Due to the excessive starting current, the impact on the power grid is also great, posing a threat to the insulation and operation ...[Details]
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1 Introduction
Since 1978, when R. Keller first used RDMiddlebrook's theory to perform SPICE simulation of switching power supplies, in the past 30 years, many scholars have established th...[Details]
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Jiwei.com reported on January 29 that today, Chen Jin, general manager of Lenovo China's mobile phone business department, demonstrated Motorola's wireless charging technology on Weibo. The charging ...[Details]
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Rechargeable batteries are widely used in industrial and agricultural production, national defense science and technology and other fields, and the detection and charging of rechargeable batter...[Details]
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A Brief Discussion on Digital Television and Its Measurement
Abstract: Based on the basic concept and background of digital TV, this paper introduces the main parameters and instrum...[Details]