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Working principle of motor forward and reverse control circuit
The motor forward and reverse control circuit is a common electrical control device, which is mainly used to control the forward ...[Details]
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Respiratory KZ leakage test is used to test the filtration efficiency and protective effect of respiratory KZ and protective masks. The test standard refers to GB2626-2019. GB2626-2019 Respiratory ...[Details]
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A multimeter is also called a multimeter, a three-meter, or a multiplexer. It is a multifunctional, multi-range measuring instrument. Generally, a multimeter can measure DC current, DC voltage, AC ...[Details]
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Measuring phototransistor Step 1: Prepare the multimeter before measurement, select the range switch and set it to R×1K - adjust to zero, remove the oxide layer on the pins of the phototransistor and...[Details]
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OFweek Cup · OFweek 2023 China
Robot
Industry Annual Selection (abbreviated as OFweek Robot Awards 2023) is jointly organized by OFweek, China's high-tech industry portal, and its authorita...[Details]
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vivo’s official Weibo account officially announced that the new product vivo Z5x will be officially unveiled on May 24. Tonight, vivo Z5x was officially unveiled: priced from 1,398, it will be equipp...[Details]
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The IP protection level refers to the product's ability to resist dust and water. The IP protection level is composed of two numbers. The first number indicates the level of dust and foreign object...[Details]
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The ZDS2022 oscilloscope provides you with the function of exporting CSV data files of signal waveform, FFT analysis and many standard protocol analysis results. Not long ago, Mr. Liu from the Zh...[Details]
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According to foreign media reports, researchers at the University of Waterloo in Canada have developed a cheaper and more efficient way to enable high-speed wireless connections for IoT devices. (I...[Details]
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Beijing time, April 16th morning news, according to reports, NHK news, Japanese chip manufacturer Renesas' factory suffered a fire last month, production was affected, and it outsourced some products...[Details]
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"In every city, street lamps are densely distributed and can be used as small 5G base stations, saving a lot of cost of duplicate construction." On November 21, at the "2019 China Innovation Confer...[Details]
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Large-capacity lead-acid
batteries
(hereinafter referred to as "batteries") are the guarantee of base station power supply. When there is a "power shortage" in China, the reliability of b...[Details]
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10 years ago, recommending apps to each other was a popular trend. If I saw an interesting or useful app, I would always share it with my friends. After 10 years, sharing no longer exists, a...[Details]
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When testing hardware circuits, we often encounter some problems that are easy to ignore and difficult to detect. However, we must face up to the existence of these problems and find ways to reduce or...[Details]
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The burning of fuses in high-voltage motor excitation cabinets is a relatively complex problem, involving many aspects such as the working principle of the motor, the design of the excitation syste...[Details]
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