cord (VCC) and the ground wire.• The lead length of the capacitor should not be too long, especially the high-frequency bypass capacitor should not contain the lead.
(3) In the single-chip microcomputer control system, there are many types of ground wires, such as systematic, shielded, logical, and analog ground. Whether the ground wires are properly laid determines the anti-interference capability of the circuit board. When designing ground and ground points, consider the following:• Logically
should be as bold as possible, and the grounding area of the lead end should be increased as much as possible. Generally, input and output SimulationSignal , It is best to isolate from single-chip microcomputer circuit through optical coupling. When designing a printed circuit, the ground line should form a closed loop to improve the anti-interference ability of the circuit. The ground line should be as rough as possible. If the ground line is very f
60LUX, room lighting should have switch control, in line with the relevant electrical design and construction norms.8. What power supply should be used in the engine room system?Dual-loop power supply, and select three-phase five-wire power supply.9, the room should be used which four kinds of grounding method?1) AC work grounding, grounding resistance should no
Industrial Ethernet cabling and fault Maintenance
The industrial environment is worse than the general environment. At least the vibration, moisture, and temperature are worse than the general environment. Industrial Ethernet requires more professional knowledge and practical experience. If you are installing or using an industrial Ethernet (Industrial Ethernet switch), you must understand the Five Points of cabling, signal quality, grounding circuit
Since the system was changed to Ubuntu linux, flash in firefox has never been audible. I tried many methods and did not solve them. The solution is as follows: sudoln-s/tmp /. A esd-1000/socket/tmp /. esd/socket, disable all firefox, and restart firefox to hear the sound. Since the system was changed to Ubuntu linux, flash in firefox has never been audible. I tried many methods and did not solve them.
Th
Main Station http://www.mpg123.de/mpg123/mpg123-0.59r.tar.gzDownload this latest versionPut it here.# Cd/usr/local/src# Tar-zxvf mpg123-0.59r.tar.gz# Cd mpg123-0.59r# MakeYou must specify the system which you want to compile:
Make Linux-help Linux, more helpMake FreeBSD-help FreeBSD more helpMake Solaris 2.x (tested: 2.5 and 2.5.1) using sparcworks CCMake Solaris-GCC Solaris 2.x using gnu cc (somewhat slower)Make Solaris-gcc-ESD Solaris 2.x using gnu
Article turn from: Bean System Collection SpareWIN10 Preview version of the system installed A lot of users, now the latest version has reached 10049, but before many of the 9926 or 10041 version of the students in the system automatically updated, and found that Microsoft officially provided by the speed of super-power, There are users to reflect the download 1 days 24 hours have not downloaded good, small series also personally tested, or no good! Today in the next door forum a master shared a
First shorthand, as a note, later organized:[Need]Tools:linux, Dmg2img (with dmg2img on the Aur)FILES:OSX-10.10.DMGU disk: Greater than 6G[STEP]1. Prepare U diskMKFS.HFSPLUS/DEV/SDXY (SDX for U-disk, SDXY for more than 6G partitions)MOUNT/DEV/SDXY USB2, Get basesystem.dmg, Basesystem.chunklist, PackagesDmg2img-p 5 osx.dmg osx.p5.imgmount-o Loop OSX.p5.img OSXDMG2IMG-P3 OSX/XXX/INSTALLESD.DMG InstallESD.p3.imgMount-o Loop InstallESD.p3.img ESD3. Build BasesystemDmg2img-p3
. Put the small hard disk for backup into the hard disk box, connect the IDE line and power cord, fix it and seal the lid, a mobile hard disk is born.
When the need for data backup, as long as the USB cable will move the hard disk to the host's USB interface, in the Win2000/xp/vista series, you can implement Plug and play. This scheme can even avoid the problem of interleaving of two physical hard disk characters.
Solution to the problem in this chapter
In fact, the IDE has a total of 40 inte
capacitor and the heart-piercing capacitor can be used.
Three-terminal capacitor:
Three-terminal capacitor installation:
The grounding end as short as possible, reduce the grounding end of the lead inductance.
Shortage of three-terminal capacitors:
Wear heart capacitance:
As the grounding end and the ground can be close contact, lead inductance is s
power ground. In the design, the analog ground should be as bold as possible, and as far as possible to increase the grounding area of the terminal. Generally speaking, the analog signal for the input and output, and the microcontroller circuit is best separated from the optocoupler.
When designing the printed circuit version of the logic circuit, the ground wire should form a closed loop and improve the anti-jamming ability of the circuit.
The groun
Computer Room engineering integrates multiple professional technologies such as construction, electrical, installation, and network. The environment of the computer room must meet the requirements of computer and other computer and electronic equipment and staff for temperature, humidity, cleanliness, electromagnetic field strength, fire protection, security, power quality, lightning protection and grounding. The advantages and disadvantages of the de
aluminum foil shielding can provide significant anti-Electromagnetic/RF interference capability in the correct grounding.
Grounding: Correct grounding is the key to effective shielding. Ungrounded or incorrect grounding may reduce the shielding effect. The ideal shielding groundin
phenomenon; According to the figure of the transformer model, capacity and impedance match,third, the insulation resistance determinationThe two terminals of the broadcast line are disconnected, and the insulation resistance between the wires is measured with a 500V meter. The measurement project is: wire and wire and wire and ground insulation resistance, insulation resistance is generally not less than 0.5mω, for each circuit resistance should be carried out in the sub-loop measurement, the m
layer of aluminum foil shielding can provide significant anti-Electromagnetic/RF interference capability in the correct grounding.
Grounding: Correct grounding is the key to effective shielding. Ungrounded or incorrect grounding may reduce the shielding effect. The ideal shielding
simple layer of aluminum foil shielding can provide significant anti-Electromagnetic/RF interference capability in the correct grounding.
Grounding: Correct grounding is the key to effective shielding. Ungrounded or incorrect grounding may reduce the shielding effect. The ideal shielding
interface and realizes the connection between the buildings.
2) Equipment Subsystem
The eia/tia569 standard stipulates the wiring of equipment between devices. It is the most important management area of the wiring system, and all floors are transmitted by cable or fiber optic cable. Typically, this system is installed in the mainframe room of computer systems, network systems, and program-controlled system computers.
3) Vertical Backbone subsystem
It connects communication rooms, equipment, an
public impedance between them, and its impedance coupling is restrained. The local decoupling capacitor is installed between the power terminal and the ground terminal of each integration piece, and is as close as possible to the Integration piece.
The decoupling capacitor between the Board refers to the capacitance between the power supply plane and the ground plane. It is the main source of decoupling current at high frequencies. The Inter-board capacitor can be increased by adding the area b
System. The electronic system here also includes cables. This parasitic electrical energy can affect the normal operation of the Integrated Wiring System on other nearby cables or systems, reduce the reliability of data transmission, increase the bit error rate, distort the image, and control the misoperation of the signal. Electromagnetic radiation is related to the security issue of information being stolen by irrelevant persons during normal transmission, or may cause electromagnetic polluti
part of the outdoor power supply module 。
2. Outdoor part: This part is installed on the outdoor fixed bracket, the antenna is installed on the top, the wireless bridge device and the outdoor power supply module are installed in the outdoor waterproof chassis 。
3. connecting the outdoor part and indoor part of the RJ-45 line this RJ-45 line for the standard 8-core straight line, in outdoor installation should be protected with PVC pipe or other materials that meet the outdoor installation stand
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