kicad pcb

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

Annotated Source: http://www.cnblogs.com/einstein-2014731/p/5650943.htmlCadence is more cumbersome to use than Altiumdesigner, but more open and flexible, and it's a good choice to get used to.The method of adding Chinese characters to the PCB was found on the Internet and summarized below.1, install AutoCAD, I use 2010, and install the Express tool tools.If AutoCAD is already on the computer, but the plugin is not selected, it can be done by: program

The next-door King has already talked about the principle of TDR and how to determine the TDR resolution. So, we have to correctly measure the circuit impedance on the PCB board, and what needs to be noted?1, the impedance Test industry standardsHave posted a lot of impedance test pictures, re-paste a picture for everyone to see. Impedance is not an imaginary straight line, but a downs. In the front and back end will be affected by the probe or open c

This semester we learn the operating system, so we have to write a PCB.So I borrowed a bit of Windows PCB, wrote thisImportsSystem.Runtime.InteropServices" " " "This is the legendary PCB." " StructurekprocessDimHeader asDispatcherheaderDimProfilelisthead as LinkedList( of Processprofilesimulator) DimDirectorytablebase as UInteger DimLdtdescriptor asKernelglobaldescriptortableentryDimInt21descriptor as

1 Creating a PCB file---New2 Create a Board box add-on line, choose the option selection, the frame is long 4400mil width 32003 to the PCB frame chamfer (can not do): manufacture, drafting, Fillet (round), in the Options option, the chamfer radius is set to 100milMethod: Which corner to pour, the right mouse click on the corner of the two sides, four corners are poured, the right mouse button and done4 Add

Open the schematic and the corresponding PCB, click Pads Layout in the toolbar to connect the schematic and PCB.Right-Select the original in the schematic to select a module, and then right-click on the PCB to select a module to put together.When moving, rotate the originals by pressing the TAB key, Ctrl+e move the originals, and press Ctrl+r in situ. Select the original right-click feature to place the ori

is actually painted the most tangled piece of PCB, the left wiring is very easy, but the right 32 chip to FSMC, there are a lot of out of the IO port, cross-tangled together, there are a few lines all the way to hit 3, 4 through the hole, it is difficult to cloth.Engineering Check the next is the June 17 painting schematic diagram, today, at noon, and then today 3 o'clock in the afternoon to vote for Gali, almost two weeks of time, although there are

2004 accompany the German customers to visit the manufacturers, walked a circle, and finally to the PCB factory. Still the dirty, I took them a quick lap into the factory's conference room. Before, the German foreigner asked me to accept the "Gerber" file? I had no idea what he was talking about, so he replied that I needed the CAD file and he looked embarrassed. I sent to the factory is all the Protel format of the

interference refers to the interference source passing through spaceCouple the signal (interference) to another electrical network. In the design of high-speed PCB and system, high-frequency signal lines and integrated electricalChannel pins and various connectors may become radiation sources with antenna characteristics, which can emit and affect electromagnetic waves.The normal operation of the system or other subsystems in the system.Since the eme

This is an assignment in the operating system class. I attended the course. Maybe it is because of the attendance that I always hold on to the task with a single delay, I have no idea about my homework in this course. This process scheduling job has already been handed in. I want to write some programs over the past two days. By the way, I will update the content in my blog. If you talk less, you can write more comments instead of organizing the language. Basic Structure: Use the data structure

The computation of PCB streaming capability has always lacked authoritative technical methods and formulas. Experienced CAD engineers rely on their personal experience to make more accurate judgments. However, it is difficult for new users to use CAD. The current Loading Capacity of PCB depends on the following factors: line width, line thickness (copper foil thickness), and allowable temperature rise. As

Because our circuit board obviously cannot use the auto-wiring function, we should pay attention to the price of moving components at a time, especially holding computers with ultra-slow speed. While our PCB Board is still relatively complex, with many layers, multiple channels, and more room. Therefore, we need to fix the key devices or room, to avoid unnecessary movement of components. In the PCB, this i

1. Signal line do not take the corner, go straight. 2.PCB, at right angles there will be radiation effects, electromagnetic compatibility problems. 3. Follow the modular layout and regional layout. 4. Line thickness consistent, otherwise it will heat uneven, welding problems. 5. Ground mode, single point grounding, multi-point grounding. 6. Determine where the noise comes, first exclude peripheral devices, and then eliminate the program, and fina

problems that were not solved before, At that time the card in the user interface to select the direction of the stamp hole increased (up and down)and the actual position of the stamp hole before the logic and non-judgmental jam, resulting in a little progress.looking back, it was simple,make a note of this point. 1. Vertical line definition: 80--100 or 260--2802 horizontal line definition: 3. Two form centers as a central dividing line,4. Calculate the angle of the split line to determine wheth

Tags: no implementation color 9.png src is graphics col imageIn the Engineering CAM processing Circular panel is a headache problem, the need for engineers to design their own cutting edge to meet the board and the board after the Gong board side no internal angle, otherwise it will affect the Assembly 1. Original single PCS circular board In addition, if you do not use a stamp hole connection, the mining v-cut connection must be cut-edge treatment Two. For trimming the graphics after processi

Tags: har get dynamic must cut EXE set tput val I. SQL cross-Library Execute SQL Get return value DECLARE @Dblink nvarchar( -) DECLARE @sql nvarchar(MAX) DECLARE @layer INT SET @Dblink = 'P2.fp_db.dbo.' Select @sql='SELECT top 1 @layer =layer from' + @Dblink + 'mktxhglb WHERE pdctno="'at00101ca0" " execsp_executesql@sqlN'@layer int Output',@layerOutputSELECT @layer Use: sp_executesql Rule requirements: 1. require dynamic SQL and dynamic SQL parameter list must be nvarchar 2. The parameter li

}, stringsplitoptions.removeemptyentries); ListNewList(); for(inti =0; I ) {Resultdatalist.add (NewResultdata (i +1, Strs[i])); } returnresultdatalist; } /// ///Populating data Methods/// /// /// /// Public Static voidSqlsplit_fillrow (Object obj, outSqlInt32 SerialNumber, outSqlString StringValue) {Resultdata Resultdata=(resultdata) obj; SerialNumber=Resultdata.serialnumber; StringValue=Resultdata.stringvalue; } /// ///D