The name of VR is VARIABLE RESISTOR variable resistor. The general machine is used to adjust the size of the signal. It is used for volume control, balance on the left and right, high and low knobs on the audio ... all. This component is continuous. The adjustment step (slidin

Tektronix, a market leader in broadcast video testing, monitoring and analysis solutions, has announced that Guangzhou Asian Games Broadcast Co., Ltd. has adopted its leading WFM8300 and WFM7120 waveform monitoring in terrestrial broadcasting stations and broadcasting faciliti

1. What is plasma, plasma screen and plasma TV 1. Plasma: With the increase of temperature, general substances appear as solid, liquid and gas in turn. They are collectively called the three states of matter. When the temperature of the gas is further increased, many or even a

In the power amplifier, emt1237 special protection integrated circuit emt1237 is mostly used. Pay attention to some problems when using it, otherwise it may lose its protection due to improper use, and may seriously damage the integrated block (mainly the power supply voltage

RIM subverts the previous design style, the first slider BlackBerry leaked According to news from March 4, according to foreign media reports, the rumored slider BlackBerry phone was recently exposed on the Internet. If it is true, it can be said to be a major subversion of R

A variety of testing equipment, such as biochemical analyzers, hemocytometers, and blood gas analyzers, all have negative pressure devices, which play the role of sample suction, reagent suction, and waste liquid extraction. In work, we often encounter negative pressure system

Microsoft is about to stop supporting some old operating systems such as XP SP2 Sina Technology News, according to foreign media reports today, Microsoft has announced the date to stop providing technical support for Windows XP SP2, Vista and Windows 2000. Microsoft will sto

The following two frequency writer circuit diagrams use MAX232, a special chip for computer serial port level conversion, which has the advantages of good compatibility, good stability, simple peripheral circuits and easy production. In fact, when writing frequency to the int

LCD TV EMC design technology overview The LCD TV structure mainly includes: a liquid crystal display module, a power supply module, a drive module (mainly including a main drive board and a tuner board), and a key button module. General liquid crystal display modules have bee

CeBIT mobile Internet "connects the world" The world's largest high-tech exhibition-Hannover Communication and Information Technology Expo (CeBIT) opened on the evening of March 1 in Hanover, northern Germany. The key theme of CeBIT this year is "Connected

Analysis on the development of broadband access in Japan and America NGN has become a hot topic in the communications industry. It has become a consensus that the current network will gradually transition to NGN. Japan ’s NTT has taken the lead in launching the NGN com