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Regarding the rumor that Geely Auto will invest US$300 million in NIO, NIO said it would not comment and all financing-related information is subject to the announcement. In February this year, NI...[Details]
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Smartphone market adversely affected by supply disruptions
According to Gartner statistics, the number of smartphones sold to end users worldwide in the third quarter of 2021 fell 6...[Details]
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The "Xiaomi Wear" App is now officially available on the Apple App Store. According to the official description, the iOS version of Xiaomi Wear App currently only supports Xiaomi Watch Color. U...[Details]
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introduction
AC motor variable frequency speed regulation has been widely used in developed countries around the world, and has a tendency to replace DC speed regulation. Using a frequency con...[Details]
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The power supply structure of the DC/DC power supply module includes: pulse width modulator (controls conversion efficiency), optocoupler (isolates input and output to avoid interference between the ...[Details]
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With the continuous improvement of industrial automation level, frequency converter has become an important part of digital control technology and is widely used in drive motors in industrial produ...[Details]
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0 Introduction
In some actual industrial sites, DC voltages with high voltage stability requirements are often used, such as the intelligent charging power supply of the DC battery of the car, etc. ...[Details]
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If disassembly often occurs, check whether the check mark in front of Load Application at Startup in the Debug directory is checked. Whether it is checked directly affects the loaded program. Please ...[Details]
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.macro restore_user_regs
ldr r1,
ldr lr, ! @ !Used to control whether the final new address of base address indexing is written back.
@ After executing ldr, sp is w...[Details]
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After the samples are prepared, they are sent to the laboratory for testing . The box is not only sealed, but also covered with a bag. The staff explained: "This is mainly to prevent the sample from...[Details]
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Medium-sized German manufacturing companies still have great potential for increasing productivity: less than one-fifth of German manufacturing companies have an automation level of more than 75% in ...[Details]
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During the normal operation of the motor, if one phase fuse is blown or one phase is disconnected for some reason, the power supply changes from three phases to single phase, and the stator magneti...[Details]
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The characteristics of isolated feedback generator UC3901 are introduced, and the design method of magnetic isolated feedback high voltage power supply using UC3901 is given. The main circuit adopts p...[Details]
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LM317 current expansion circuit
Figure 1:
2N3055 can expand the current, but it is a bit dangerous to use it at 5A. It is better to use two in parallel to be safer.
LM317 curre...[Details]
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This board has a part of the version of Master Laoshou, and a part of it is my own drawing and modification. Circuit board size: 223x159 (mm) This board has functions such as overload protection, ...[Details]
PCB Design
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