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The three devices, dial-up modem, ISDN terminal adapter and xDSL, are subject to different losses in the actual telephone network when working. This article introduces how to test dial-up modem, IS...[Details]
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The full name of the transistor should be semiconductor transistor, also known as bipolar transistor, crystal transistor, is a semiconductor device that controls current. Its function is to amplify...[Details]
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The oscilloscope is a commonly used electronic measuring instrument, which is widely used in many industries. When we use the oscilloscope, its measurement accuracy is very important for users. In fa...[Details]
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I have been self-studying microcontrollers for a while. I have read half of the 300-page PDF tutorial. I have just finished reading the timer and independent button parts. Combining the previous digit...[Details]
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Note: In keil , if the pointer does not point to a pre-declared variable in MCU C programming , confusion will occur . For example: Scenario 1: Scenario 2: Type *p,*q; Type *p,*q,pp,qq; Assign ...[Details]
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Preparing for electromagnetic compatibility ( EMC ) emissions and susceptibility testing can raise your blood pressure. Will your product pass? Good design practices and relying on your intuition abo...[Details]
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沒有肯定很好的数字万用表，不管指南针数字万用表或是数字万用表，依据本身经济实力来挑选它。 数字万用表分成数据和表针两大类型！ 数字万用表也是有多种多样！除开精确测量交交流电压、交直流电流、电阻器、二极管、导通、三极管放大倍率的常用功能！也有可以精确测量电容器、电感器、溫度、頻率这些！ 数字万用表没法全是精确测量交交流电压、交直流电流、路线阻值、頻率、电力电容器容积这种作用。即然你觉得要很好的数字...[Details]
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Theodolite structure machine parts 1. The structure of theodolite (main commonly used components): Theodolite 1 Telescope brake screw 2 Telescope 3 Telescope fine-motion screw 4 Horizon...[Details]
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On the evening of May 15, OnePlus officially released the OnePlus 7 Pro overseas. The phone adopts a true full screen + lifting camera design. Now OnePlus has demonstrated the reliability of the lift...[Details]
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The MAX14770E is a half-duplex, ±35kV HBM high-voltage ESD-protected transceiver for PROFIBUS-DP® and RS-485 applications. In addition, the device can be used for RS-422/V.11 communications. The MAX14...[Details]
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The test program and Makefile are the same as the previous experiment. Here we only need to record the source code of the driver. The changes are not big. We just move the operations of waking up the...[Details]
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The use of oscilloscopes during home appliance repairs has become very common. Through an oscilloscope, you can visually observe the waveform of the circuit under test, including shape, amplitude, fr...[Details]
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1. Current Status of AVS
AVS (audio video coding standard) is the second-generation digital audio and video source standard independently formulated by my country, and was officially implement...[Details]
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1. Selection of broadcast speakers
In principle, different types and specifications of broadcasting speakers should be selected according to the environment. For example, in a room with a ...[Details]
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Soft starter and auto-coupling step-down starting are two different motor starting methods. They have certain differences in starting principle, structure, performance, application, etc.
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