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Entrusted by the Department of Higher Education of the Ministry of Education and the Department of Personnel and Education of the Ministry of Industry and Information Technology, the National Undergra...
A circuit was originally designed to test the size of AC current. The design value is 5A maximum, with multiple ranges. The range switching is performed through the MOS tube IRF540. The Ids of this tu...
Note: Dual color temperature dimming is mainly achieved by changing the capacitance of C1 and C2, which results in different delays in VDD power-on time. Multiple capacitors are increased in sequence ...
Shouldn't the PN532's IRQ pin generate an interrupt when a card is received? I'm using the serial port mode, but why is it that even though I set the IRQ pin to be enabled, it doesn't work? I can read...
Bloomberg columnist Tae Kim published an article on the 18th discussing the global chip shortage. He said that the surge in demand for consumer electronics since the outbreak of the COVID-19 pandemic...[Details]
The main reason for the damage of metal components and parts is fatigue failure caused by various micro- and macro-mechanical stress concentrations. Its basic characteristics are that when the mate...[Details]
Principle of TV scanning technology
Television technology uses the principle of photoelectric conversion to achieve the conversion of optical images into television signals. This conversion proce...[Details]
Regarding the impact of the Wuhan epidemic on the global memory industry, DRAMeXchange's survey pointed out that no production lines of DRAM and NAND Flash factories located in China have been partia...[Details]
introduction
The access time of IDT70V28L (dual-port RAM) is greater than 20ns. PCI9052 works at 25MHz, and its access time is greater than that of dual-port RAM. PCI9052 is the initia...[Details]
A signal generator is a device that can provide electrical signals of various frequencies, waveforms, and output levels. It is used as a test signal source or excitation source when measuring th...[Details]
A few days ago, screen tests of Samsung Galaxy S22+ and S22 Ultra were leaked. The results came from the company’s own development laboratory, and they are exactly the same as the various leaks seen ...[Details]
When measuring insulation resistance with an insulation resistance tester, what factors may cause inaccurate measurement data? Why? a) The battery voltage is insufficient. The battery voltage is too ...[Details]
Ultrasonic level meter adopts non-contact measurement technology, uses the time difference between sound wave emission and reception, and the propagation speed of sound waves to calculate the height ...[Details]
Starting from July 1, the "Announcement on Hainan's Duty-Free Shopping Policy for Off-Island Passengers" will be officially implemented, which means that domestic consumers who come here to buy...[Details]
/************************************************************************************** * Static digital tube display experiment * Implementation phenomenon: After downloading the p...[Details]
Push-pull output: can output high or low level and connect digital devices; push-pull structure generally refers to two transistors that are controlled by signals from the abdomen respectively, and...[Details]
It is the end of another year. Looking back at 2019, the new and old forces confronted each other head-on, technological innovation accelerated the reconstruction of the pattern, and the business eco...[Details]
First of all, the rotor of Tesla's 3D6 motor adopts the classic single V permanent magnet structure, which uses a three-segment approach to optimize noise, with the middle segment being twice the s...[Details]
Power technology
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