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The medical protective filter material respiratory resistance detector is used to measure the inhalation and expiration resistance of the filter material under specified conditions. It is suitable fo...[Details]
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The development of Linux kernel is a long process. Since the development of 2.5.0 in November 2001, the development of Linux kernel has been very rapid, with many major improvements and performance...[Details]
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Constant voltage drive circuit
Constant voltage drive circuit
This is a constant voltage drive circuit, which uses a voltage stabilizing diode ZD1 (8.6V) to protect the constant drive sign...[Details]
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1. Introduction
In high-speed serdes systems, factors such as the impedance discontinuity of long-distance transmission lines, connectors, and vias on PCBs cause great attenuation of signals. For ex...[Details]
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"Since last year, the market has paid more attention to quickly entering mass production rather than just focusing on L3 or L4 level autonomous driving. This trend is expected to continue." Faced w...[Details]
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1. What is the process for handling command exceptions at the user level? When a user-level program is executing, an exception will be generated if it encounters an undefined instruction (ARM is no...[Details]
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The latest data from international research company Counterpoint shows that smartphone shipments in China grew 3% year-on-year in the second quarter of 2017. Huawei , OPPO , vivo and Xiaomi account...[Details]
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First attach a pin diagram of stc89C52 Just looking at the pins is not enough. Let’s take a look at what the actual picture looks like. 1. P1^0~7 corresponds to eight diodes The physical picture ...[Details]
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As an important entry point for the layout of smart homes , the smart speaker industry has attracted many leading manufacturers and Internet upstarts to enter the market: in addition to leading comp...[Details]
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In many liquid level measurement applications such as chemical and pharmaceutical industries, the flow, addition or discharge of liquid materials, as well as tank vibration caused by environmental ...[Details]
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The development of IP phones has gone through three generations. The third generation of IP phones is the product of the popularization of the Internet. At present, Ethernet interfaces directly ente...[Details]
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Abstract: Dot matrix liquid crystal display modules are gradually being promoted in industrial control equipment. According to the requirements of the DMF50081NB-FW dot matrix liquid crystal dis...[Details]
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Production of electronic fish trap
How electronic fish traps work
The fish trap is made based on the principle that electric energy with a voltage higher than 100V and a power greater than 3...[Details]
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(Image source: Esri official website) According to foreign media reports, Esri, a positioning intelligence and mapping software system company, announced a collaboration with Mobileye to integra...[Details]
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O-Film's "off-chain" has caused a lot of concern among A-share investors, people all over the country and even the world. Various rumors have also spread. This is a sudden disaster for the company, a...[Details]
Microchip MCU
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