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设计一个可容纳四组参賽的数字式抢答器，每组设一个按钮供抢答使用。抢答器具有第一信号鉴别和锁存功能，使除第一抢答者外的按钮不起作用；设置一个主持人“复位”按钮，主持人复位后，开始抢答，第一信号鉴别锁存电路得到信号后，用指示灯显示抢答组别，扬声器发出２３秒的音响。
*设置犯规电路，对提前抢答和超时答题（例如3分钟）的组别鸣笛示警，并由组别显示电路显示出犯规组别。
设置一个计分...[Details]
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1. Industry Overview
Industrial servo drive and control system refers to an automated control system that is composed of control quantities such as displacement, speed, angle, etc. of an o...[Details]
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With the continuous development of microelectronics and computer technology, the instrument structure has undergone a fundamental change. With microcomputers as the main body, computer technology and ...[Details]
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In March 2021, STMicroelectronics (ST) announced the launch of STM32U5. In September, the first batch of STM32U5 models were officially put into mass production. This also means that ST has launche...[Details]
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1. Test of ordinary resistors When the parameter mark of a resistor falls off for some reason or its precise resistance value is unknown, it is necessary to use an instrument to measure it. For the r...[Details]
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From April 25 to May 4, the 2024 (18th) Beijing International Automotive Exhibition (hereinafter referred to as "Beijing Auto Show") will be held at the Shunyi Pavilion of the China International E...[Details]
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The first step is to enter the ST official website ( ST official website ), you can choose Chinese (it is recommended to read more English, which is very useful for reading data manuals. The followi...[Details]
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Image quality upgrade with low power consumption, low latency and low DDR bandwidth achieved through VeriSilicon FLEXATM technology
September 6, 2022, Shanghai, China -
...[Details]
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1: The basics of LED display devices.
There are two commonly used types of LED light-emitting devices, digital tubes and dot matrix.
1: Digital tubes.
A. Digital tubes are usually 8-sha...[Details]
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The core and structural parameters of the transformer are determined by the core type and winding technology selected during assembly. When selecting a core, usually its physical height and cost a...[Details]
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How to use a multimeter to measure the size of inductance and resistance? The pointer multimeter consists of a meter head, measuring circuit components and a conversion switch. It has two appea...[Details]
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Nijmegen, August 17, 2023: Nexperia, the expert in high-volume production of basic semiconductor devices, today announced the launch of a load switch product series to
further expand its anal...[Details]
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At present, intelligent manufacturing has become an important strategic direction for China to promote economic transformation and upgrading and realize the dream of becoming a manufacturing powe...[Details]
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Abstract: There are two methods to implement the phase shift method in reactive power measurement, one is based on sampling point shifting, and the other is to use the Hilbert filter. These two met...[Details]
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At present, the China Food Industry Association points out that due to the lack or problems of cold chain logistics management, about 12 million tons of fruit and 130 million tons of vegetables ar...[Details]
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