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PCB cabling procedure Reprinted from: http://blog.21ic.com/user1/6960/archives/2011/83333.html I. Circuit Board Design ProcedureGenerally, the most basic process of designing a circuit board can be divided into three steps.(1). Circuit Principle The schematic design of the circuit diagram is mainly the schematic design of protel099. System (Advanced schematic) to draw a circuit schematic. In this process, make full use of the various sc

When we conduct PCB cabling, we always face two or three kinds of situations on one board. The silly practice is of course, regardless of the case of November 21, copper is applied as long as it is the ground. This is not a problem for low-speed boards or boards that are insensitive to interference. Otherwise, the Boards may not work properly. Of course, if there are many places on a board, even if the Board has no requirements, but from a rigorous an

Altium Designer's PCB footprints are often seen in the same package, such as the IPC low density (lower density), IPC medium density (medium density), IPC high density (dense), such as TSSOP16, Why do you say that? IPC is the abbreviation for the American "Printed Circuit Board Association" ("the Institute of printed circuit").The "Printed Circuit Board Association" was renamed several times, but the IPC abbreviation has remained unchanged. IPC has de

1. File-->page SetupPrinter paper A column is the printing paper settings, no longer wordy.The main is the scaling column: ScaleMode selection: ScaledprintThe following scale fills 1, which represents 1:1 of the proportional print. such as 1:2, then click the Advanced tab in Figure 1 to enter the print content settings.Under the Printoutlayers project, remove the top overlay (right-click-->delete)The following is shown in Project Setup 2.I do the general is a single-layer board, so, generally on

The actual results of the PCB effect (note slot edge) in the different layers of the hole shape are drawn in different layers of the slot shape (note the slot edge)Many friends asked in the use of Altium designer PCB design, want to open a slot on the board or dig a hole how to operate, is the use of keep-out layer or mechanical layer, today, here to answer, both in the actual operation are used (and large

Last Update Time: 2010-02-06 09:56:45 There is a horn socket in the Red Circle : After the memory is unplugged, there is still a layer of stuck Plastic Parts blocking the circuit board near the horn Outlet Take a picture of the opening part of the plastic slice as follows: Should it be a BIOS battery? I split the black plastic hard shell at the place where I inserted the headset. Can I see it (the next two pictures)? I wonder if this will affect the speaker's voice? Th

special instructions, in addition to the shape to give an effective shape, such as the inner groove, and the inner groove at the intersection of the outer shape of the line should be deleted, no leakage of the groove, design in the mechanical layer and the keepout layer groove and hole is generally based on the production , if you need to process into a metal hole, please special remarks.3, if the most prudent way to do metallization slots is to put together multiple pad, this practice must be

 Author: Wang Huidong, a hi-tech team member In the "Skin of the PCB," the article, we have proposed when the thickness of the plate in 1.6mm and above, how to avoid the use of false eight layer of the stack, resulting in increased PCB costs. I feel the answer is very enthusiastic ha, it seems that the problem is still more typical. Would like to intercept some of the answers put here, but the relations

What is PCBIn order to describe the operation of the control process, the data structure of the management and control information of the process in the system is called Process Control block, which is part of the process entity and is the most important recorded data structure in the operating system. It is the most important data structure of process management and control, each process has a PCB, when the process is created, the

The new PCB file defaults to the 2-layer board, which teaches you how to set 4 layers or even more multilayer boards. On the toolbar, click design-->layer Stack Manager. After entering the display is a two-layer board, added as a 4-layer board, usually first point top layer, then add layer, and then add layer, so it becomes a 4-layer board . See figure below. Some people do not point to add layer, but point to add plane, the difference is that the

First, preface:The so-called interaction is such, in the schematic click on a component, in the PCB diagram is selected, so that the component just lead into the PCB layout of the components can provide us with great convenience.Second, the premise:Importing components in the PCB is this way: Where the path is the path where the schematic is located.

Transferred from Zhang Fei actual combat electronic public numberGeneral principles of PCB cablingShortest path and reduced interferenceThe overall process of PCB cabling is as follows:1 understand the manufacturing specifications of manufacturers-line width, line spacing, over-hole requirements and layer requirements;2 Determine the number of layers and define the functions of each layer;3 Design Cabling r

(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

Formula for propagation delay of cabling in PCB The first half is information from altera. The propagation latency (tPD) is the time required to transmit a signal from one point to another. Transmission Line propagation delay is a function of the relative dielectric constant of materials. Propagation delay of micro-Strip Layout You can use formula 5 to calculate the propagation delay of the strip layout. Formula 5: Delayed propagation in the line

Address: http://www.sig007.com/usesoft/74.html Schematic Design Software: orcad can be used, and supports a large number of netlist, which is basically industry standard. PCB layout Software 1. Protel, now push alicloud designer. The mainstream of low-end design in China is basically useless in foreign countries. It is easy to learn and suitable for beginners.High Computer Configuration Requirements. People who use Protel in China still have

General principles of PCB Board component layout:The general principles that designers need to follow in the layout of PCB boards are as follows.(1) Components preferably single-sided placement. If you need to place components on both sides, placing pin components on the bottom layer (Bottom layer), it is best to place the components one-sided. It is possible to cause the circuit board is not easy to place,

Circuit Design: This is a very big concept, from the voltage intensity can be divided into strong electric circuit design and Weak Current Circuit Design; from the design tool can be divided into manual drawing and electronic auxiliary design, the circuit types can be divided into analog circuit design and digital circuit design. Icdesign: The IC Design refers to the chip design, that is, the design of the circuit on a crystalline silicon chip, which requires a high process and technology. Th

Linux drawing schematic and PCBThe famous Allegro and classic Protel 99SE under Windows are not supported by Linux operating systems, and it is unavoidable to look at schematics and PCBs for Linux driver development.There are three general ways of doing this:1. Host uses Windows system, Linux installed in virtual machines such as VMware so that you can use the software under Windows to see the schematic and PCB;2. In turn, a Windows virtual machine is

Label: show only one layer1 SHIFT + s this shortcut can highlight the current layer and make other layers gray, see: 2. Hide a specified layer In the lower-right corner of the figure, right-click and an option bar will pop up. Select hide layers to select the layer you want to hide. 3. Right-click any position in the PCB diagram of the specified layer in view deployments and choose Options> boardlayers colors. On the board lay

When walking multilayer board, often need to hit the hole, then how to classify the hole? and look down.(1) Through-hole: this hole through the entire circuit board, can be used for internal interconnection or as a component of the installation of the locating hole (for connecting layer; Creating a drilling file, punching on the PCB and electroplating in the hole, usually much larger than the signal line);(2) Buried hole: refers to the printed circuit