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若需控制LED 亮度，就必须具备能够提供恒定、稳压电流的驱动器。而要达到此目标，驱动器拓朴必须能产生足够的输出电压来顺向偏置 LED。那麽当输入和输出电压范围重叠时，设计人员又该如何选择呢？转换器有时可能需要逐渐降低输入电压，但有时也可能需要升高输出电压。以上情况通常出现在那些具有大范围"脏" (dirty) 输入功率来源的应用中，例如车载系统。在这种降压/升压的操作中，几种拓朴可以达到较好...[Details]

According to foreign media reports, Flexpoint Sensor Systems (FLXT) has recently improved its patented occupant classification sensor (Occupant Classification Sensor) or seat sensor. Now, the automot...[Details]

The year 2019 is about to pass, and the ICT industry has been full of climaxes. Among them, 5G is undoubtedly a highlight: China's 5G is officially commercialized, which not only allows Chinese mob...[Details]

　　The 8086 instruction system is divided into the following 6 groups: 　　⒈ Data transfer instructions 　　⒉ Arithmetic instructions 　　⒊ Logical instructions 　　⒋ String processing instructions 　　⒌ Co...[Details]

By using an additional circuit board, input the electrical signal to be observed, and connect the output signal to the video input interface of the TV, the waveform of the electrical signal can be di...[Details]

First of all, STM8 has three low-power modes, namely waiting, active shutdown and shutdown. Please read the official manual for the specific differences between the three. Here we only talk about t...[Details]

A single-chip microcomputer is also called a single-chip microcontroller. It integrates a computer system into one chip. In general, one chip becomes a computer. Single-chip microcomputer technology i...[Details]

Abstract: As the resolution is larger than that of analog screens, the lines on the glass will be denser, and the cost of process and backlight is higher. In the field of industrial instruments an...[Details]

1. The first byte sent by the serial port is lost Problem code void USART1_SendBuf(uint8_t *pbuf, uint8_t len)   {     for( uint8_t i = 0 ; i len ; i++ )     {       /* Write a byte to USART...[Details]

The program of the microcontroller needs to be self-upgraded. Most of the current IAP programs start a small program when powered on, which we call the boot program. Then the program will interact wi...[Details]

　　In the above blog, the author introduced how to set the default role in RBAC. 　　Here I will introduce how to use custom Role. 　　The main contents are: 　　1. Understand Action and NotAction in ...[Details]

      On the evening of March 15, Lu Weibing, President of Xiaomi Group China and General Manager of Redmi brand, asked netizens: "How do you pronounce the K in Redmi K50? I've been dizzy lately." 　　...[Details]

　　Nowadays, multimeters have become a basic tool for everyone in all walks of life. According to the different accuracy, handheld multimeters are divided into three-and-a-half-digit, four-and-a-half-...[Details]

0 Introduction Anti-interference testing of modern communication electronic equipment has become a necessary test item, and the main type of interference is noise interference. In the fiel...[Details]

The trend of solidification of lithium-ion rechargeable batteries and lithium-polymer rechargeable batteries is increasing. Some manufacturers have already started selling products. Since the produ...[Details]