Guid: that is, globally unique identifier (globally unique identifier) is also called UUID (universally unique identifier ).
Therefore, the guid is the UUID.
GUID is a 128-bit long number, which is generally expressed in hexadecimal notation.AlgorithmThe core idea is to combine the machine's Nic, local time, and a random number to generate a guid.
Theoretic
(1) Error One
In the schematic of the electrical connection, must appear red fork, otherwise not counted electrical connection:
The following figure:
(1) Error two
The same network designator, on behalf of the electrical connection, when placing the net network designator, also should pay attention to, appear red fork to calculate electrical connection
(1) Error three
When making the schematic library, manually draw the schematic elements, note that the pin cross-out (otherwise all errors):
(
Label: des HTTP ar strong data SP Div 2014 CPCB design, especially high-frequency and high-speed design, will inevitably involve the calculation and setting of PCB-related parameters, such as via overcurrent capacity, via parasitic capacitance, impedance, etc, the current carrying capacity of the wire, crosstalk between two coupling signal lines, wavelength and other parameters.Here we will introduce a Saturn PCB
Autocam Automation platform, front-end management orders, the back end of the task, the front-end UIL interface has board thickness, copper thickness, plate, surface treatment, layers and other information, And this information is not after the end of the end of the information needed. Take the bore hole compensation, the back end needs is the borehole compensation value, but the front end does not have this information, wants to get this drill hole compensation value is through the Multidimensi
Linux-based schematic and PCB, Linux-based schematic PCBLinux schematic and PCBThe famous Allegro and the classic Protel 99SE in Windows do not support the Linux operating system. To develop a Linux driver, you must check the principle diagram and PCB.There are three common practices:1. The host uses the Windows system and installs Linux in virtual machines such as VMWARE so that you can use the software in Windows to view the schematic diagram and
Objective: To add a logo to an enterprise design or personal work
Tool used: alicloud desinger 6.6
Photoshop
Background: The black and white images required in the operation are not black and white images that appear. But the file storage method is only black or white. You can edit the image file to open it. The image storage depth is 1 bit.
Procedure:
1. Use PS to convert an image into a black/white BMP Image
1.1 Load
1.2 image> mode> greyscal
1.3 image> mode> bitmap
1.4 save
2. Use aladedes
contains redundant members.◆ The component classes with extra members component class contains redundant members.◆ Different descriptions of difference component Components◆ Change of different designators component identifier◆ Different library references different component reference libraries◆ Different types standards◆ Different footprints component encapsulation change◆ Extra channel classes redundant channel classes◆ Extra component classes red
PCB Optimization Design (i.)2011-04-25 11:55:36| Category: PCB design SMT technology is now very mature and widely used in electronic products, therefore, electronic product designers need to understand the SMT technology common Sense and manufacturability design (DFM) requirements. SMT process products, at the beginning of the design should be integrated into consideration of the production process, raw ma
From http://blog.mcuol.com/User/luozhen0810/Article/9700_1.htm
Printed circuit boards (PCB) appear in almost every electronic device. If there are electronic parts in a device, they are all mounted on PCB of different sizes. In addition to fixing all kinds of small parts, the main function of PCB is to provide the electrical connection between the above parts. A
From: 21ic
When it comes to PCB, many friends will think of it everywhere around us. From all household appliances, various computer accessories, to various digital products, PCB is almost used as long as it is an electronic product, so what is PCB? PCB is the printedcircuitblock, that is, the printed circuit board, fo
channels6. On-Site protected areas: for the protection of blocking processes7. Resource requirements, distribution control information8. Process entity information, indicating the program path and name, whether the process data is in physical memory or in the swap partition (paging)9. Other Information: Work unit, work area, document information, etc.
Different operating systems in the process of control and management mechanism, the PCB inf
problems, especially the EMC and EMI Problems in High-Speed PCB wiring. There are many conflicts and they are a headache. How can we solve these conflicts?
Answer: 1. Basically, it is right to divide and isolate the modulus/number. It should be noted that the signal line should not be crossed through a separate place (moat), or the returning current path of the power supply and signal should be too large.2. the crystal oscillator is a simulated posit
Before the introduction of the PCB (Process Control block), the first implementation of a ' progress bar ', and then according to the program written to analyze the specific PCB implementation principles. The ' progress bar ' function is able to be displayed in a single line, while the progress bar has a dynamic growth change, to know the ratio in the progress bar, but also need to be able toShows you know
Address: http://www.pcbres.com/pcbtech/circuit/20070612145.html
URL: http://www.360doc.com/content/10/1227/16/4920904_81765495.shtml
This section describes the PCB wiring and some common rules for PCB painting. When you use PCB layout, you can refer to these materials to draw a high-quality PCB. Of course, you can also
Address: http://blog.csdn.net/happyflovef/article/details/5584479
Design of multilayer PCB at, December 30
Before designing a multi-layer PCB, the designer must first meet the requirements of the circuit scale, circuit board size, and EMC.Determine the structure of the circuit board, that is, the four-layer, six-layer, or more layers of the circuit board. After determining the number of layersDeter
Problem Description:VC + + Program compile-time prompt error: "HANDLE": an undeclared identifier and many other error prompts, as follows: C2065error C2065: "HANDLE": Undeclared identifier Error C2146: syntax error: Missing ";" (in front of identifier "Hfind") Error C2065: "Hfind": Undeclared identifier error C2065: "I
Toplayer (top) Draw the line is red, is the general double-sided board on the upper layer, single panel can not use this layer.The Bottomlayer (bottom) line is blue, which is the line above the single panel.MidLayer1 (middle layer 1) This is the first layer, as if there are 30 layers, the general design staff can not use, you do not have to control him, multi-panel time use. The default is not displayed in 99SE and is not available.Mechanical Layers (mechanical layer) (purple red) used for label
Design processA. Creating A network table1. Network table is the schematic and PCB interface files, PCB designers should be based on the use of schematic and PCB design tool characteristics, choose the correct network table format, to create a network table that meets the requirements.2. In the process of creating a network table, you should actively assist the s
(1) role of the process control block-the process has a unique entity;
Because the process control block records the existence and characteristics of the process, the PCB and the process are born to death. When a process is created to establish a PCB for it, the process is revoked, the system will be subject to its PCB. The OS controls the process according to t
Requirement Description: Candence basic knowledgeContent: From schematic to PCB specific stepsfrom: time of the poemFrom: Http://blog.163.com/tracy_zhangblog/blog/static/1938540202011117103433500/A. Schematic diagram1. Establish EngineeringAs with other drawing software, OrCAD manages various design files with project. Click the Start menu, then all Programs-Allegro SPB 15.5--design Entry CIS, select the first item orcad_capture_cis_option with in the
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