pcb identifier

Top-level wiring layer of toplayer-signal Layer Bottom underlying wiring layer-signal Layer The connections of each pad are on the signal layer, that is, the connections of each component pin on the circuit board. Mechanical Layer -- Define the appearance of the entire PCB. In fact, when we say that the mechanical layer refers to the shape structure of the entire PCB Board. Keepoutlayer disallow the wirin

dip8 is double-row, each row has four pins, the distance between the two rows is mil, the distance between the pad is 100mil. Sipxx is the encapsulation of a single row. And so on. It is worth noting that the packaging of transistors and variable resistors is the most headache. the PINs may not be the same for the same packaging. For example, for packaging such as TO-92B, usually 1 foot is E (emission pole), and 2 feet may be B (base pole), or C (collector ); similarly, the three-legged device

Use the Keepout layer to determine the size of the line:Follow the steps in the diagram:1. Select the corresponding tag of the menu bar2. Select "Place lines" and draw line options3, in the black area of the PCB project can be drawn lineNow the line you draw is in the keepout layer, the line is pink!The boundary of the line is the boundary of the board"If you draw a line that is not pink, you need to re-select the Keepout layer!" 】Make 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

Which components can be made into PCB files?In PCB design, some components do not need to be made into components for the sake of speed.It is a waste of time to make components, and there is no actual component in production.As follows (continuous update ): The PCB is connected to the PCB before the manual post w

Engineers using Protel 99SE know that Protel in the PCB drawing is not support the Chinese character input, but as a factory production debugging convenience, the inevitable in the PCB to make Chinese marks, and sometimes for the purpose of explaining the Board, attention to matters such as to enter Chinese silk screen, So how do I enter Chinese when Protel does not support Chinese? This experience will be

attributee page in the component Properties dialog box.18. Can I write the sequence number of the element symbol in the Sch diagram as a subscript?A: No.19. In the schematic diagram of PROTEL 99 and the printing plate diagram, how to deal with the linkage components (such as the potentiometer with a switch and the tuning capacitor)A: Draw a dotted line using drawing tool bar Drawing tools in sch. This problem does not exist in PCB.20. Whether automat

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

Project Processing capacity Process details Number of layers 1~6 Layer The number of layers refers to the number of electrical layers in the PCB (the number of copper layers). At present Jia Lixin only accept 1~6 layer board. Plate type FR-4 Plate Plate type: Cardboard, half glass fiber, all glass fiber (FR-4), aluminum substrate, at present Jia Lixin only accept FR-4 plate. As show

Label: HTTP Io strong SP Div C on r ef 1 feet = 12 inch 1 inch = 1000 mill Mil 1mil = 25.4um 1mil = 1000uin (MIL ears sometimes become British) 1um = 40uin (some companies call micro-inches as microphones, but they are actually micro-inches) 1 oz = 28.35g/square foot = 35 microns H = 18 microns 4mil/4mil = 0.1mm/1mm mm linewidth 1asd = 1 AMPS/square meters = 10.76 AMPS/square feet 1 AM = 1 amps min = 60 couplet is mainly used for precious metal plating such as gold plating 1 square me

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

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