kicad pcb

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

1 Open WindowPADS inside open window is directly put copper skin in the solder layer inside is open window, but also can put a pad so fast and convenient is open window. Generally choose to put a pad is not prone to error.2 when there is an error, we need to turn all the layers open. There may be some network to pull the other layer, but the network is not connected. Therefore, in the detection of PCB connectivity, will be error. This time you need to

In the previous section, the design steps for PCB principles are described in one example, and this section further introduces some of the techniques in the design.Shield : place->directive (instruction)->compile mask to block block diagrams that are not usedAdd rule : Place->directive->paremeterset You can add PCB design rules to your schematic diagramEg: Add a patemeterset, as follows:650) this.width=650;

, 300mV noise needs to be filtered and attenuated to 50mV, which means that the magnetic beads to be divided into 250mV, assuming the load 50Ω,RAC/RL = 250/50, where RL = 50ω, get Rac = 250Ω;(2) power supply rated current 300mA, derating coefficient according to 0.75, then select the minimum rated current not less than 300ma/0.75= 400mA of magnetic beads;(3) The IC supply voltage must not be less than 3.0V, then the maximum voltage drop on the DC resistance RDC on the bead should be less than 0.

ring and the magnetic beads should be used. Their resistance to the high-frequency components in the line is about 10 to several hundred Ω, so it does not play an obvious role in the high-impedance circuit, it will be very effective in Low-Impedance Circuits (such as power distribution, power supply, or RF circuits. Iv. ConclusionFerrite is widely used in EMI control because it can degrade at a high frequency and make the low frequency pass through without any obstacles. Magnetic rings/magneti

Summary of PCB multilayer Design Reprinted: PCB multi-board design suggestions and examples (, 12) Design requirements: A. The component plane and welding plane are complete ground planes (shielded ); B. There is no adjacent parallel wiring layer; C. All signal layers should be adjacent to the ground plane as much as possible; D. The key signal is adjacent to the formation and does not span the

Install the Open Source PCB printed circuit board design software Fritzing in Ubuntu Fritzing is a set of software for designing Printed Circuit boards (Printed Circuit Board), especially for designers, artists, researchers and amateur players. Like Processing and Arduino, Fritzing developers design this software in the spirit of openness, simplicity, and sharing. Fritzing is a simple and easy-to-use software operation interface, this allows users to

wiring is initiated from the most complex devices connected on a single board. The most densely connected area on a single boardStart cabling. Loop minimum rule, that is, the signal line and its return loop area to be as small as possible, the smaller the ring area, external radiationThe less it gets, the smaller the interference from the receiving world. For this rule, in the ground plane division, we should consider the ground plane and the heavyTo signal the distribution of the line, to p

Tags: class Bubuko sel info varchar into IMA handle mergeOne of the blog posts in the "PCB MS SQL sorting application---adjacent data and the same merge processing" This article should also be used in conjunction with the same technique, to achieve the adjacent data interval value solutionExample:Original data: Before processingCalculate interval value: After processingSQL Code ImplementationDECLARE @table Table(RowNoINT, FlowtechnameVARCHAR( -))INSER

Fritzing is a set of software designed for PrintedCircuitBoard printed circuit boards. It is a tool especially intended for designers, artists, researchers, and amateurs. Like Processing and Arduino, Fritzing developers design this software in the spirit of openness, simplicity, and sharing. Fritzing is a simple and easy-to-use software operation interface, this allows users to easily design PCB printed circuit boards without the background of an elec

Always wanted to make a minimum system, this time finally put the idea into reality. Schematic diagram is as follows:The PCB diagram is as follows:After a few days, the board finally mailed to, is the following bear-like.Welding the voltage regulator circuit, found that the voltage regulator circuit schematic part of the wrong, no grounding, and then fly the root line, the regulator circuit is stable and easy to use.Welding Stm32 chip, where VCC and g

PCB Inspection MattersCheck that the device is all finished,Check that the cables are all finished,Check dangling Line,via,See if the copper skin is isolated and has no network copper skin,Check the DRC,1. Select the menu display-status to see if the marker is at 0%2. Execute Tool-quick report-unplaced Component report.3. Execute Tool-quick report-design Rules Check.Creating a drill Table1. Select Menu Manufacture-nc-drill Legend2. With the default se

Glass-based panels can be used at temperatures up to 150 ℃ to 250 ℃. The optional media materials are: FR4, dielectric constant ε0 of 4.6 Epoxy material, dielectric constant ε0 is 3.9; Polyimide, dielectric constant ε0 is 4.5. In addition, PTFE-based materials have the lowest dielectric constant and operate at temperatures up to 300 ℃, where PTFE, dielectric constant ε0=2.1; thermally solid PTFE, dielectric constant ε0=2.8; Glass-fiber PTFE, dielectric constant ε0=2.4;

Note: The post posted by the author on www.21ic.com is now reproduced. Http://bbs.21ic.com/icview-343175-1-1.html part 1/3. When editing a blog post, the typographical conflicts with the web page have been changed several times. I don't know if it is a problem with sogou browser. Once the pictures on bbs.21ic. com are referenced, the layout of the blog is disordered. If you know the situation, tell me the reason. Thank you. First PCB: Bytes ----

relationship with the specific resistance value, but the package size is related to the power. Generally, the package size is 0201 W. 0402 1/16 million 0603 1/10 million 0805 1/8 million 1206 1/4 million The relationship between the shape size and encapsulation of the capacitor resistance is as follows: 0402 = 1.0x0.50603 = 1.6x0.8 0805 = 2.0x1.2 1206 = 3.2x1.6 1210 = 3.2x2.5 1812 = 4.5x3.2 2225 = 5.6x6.5 2. Common shortcut keys: Q -- switch between the display unit mil and mm P -

Recently, after drawing a four-rotor PCB, I want to print it on A4 paper to see if the device is properly placed. Because my computer is not connected to the print sister, I can't print it directly, the intelligent PDF file of AD is used to print the Board files in pdf format. The result is that the printed board is enlarged and the original proportion is lost. In this way, the meaning of printing is lost. Later, I found a convenient method, in AD fil

is a data structure to manage the process settings. Is the only sign that the system-aware process exists.Typically contains information such as the following:(1) Process identifier (unique)(2) Process current state, usually the same state of the process will be placed in the same queue;(3) Procedure and data address of the process(4) List of process resources. Lists the resource records owned by other than the CPU.(5) Process priority. Degree of urgency of the reaction process(6) CPU field prot

post. Add the package , in the schematic, in the DSN file right-click, select Editor Object property, check the PCB footprint This column is not the package of each device has been filled in, and is not corresponding to the schematic diagram. If that's the case, it's a big part of the success. The final check checks, you can generate network tables ,DSN files, Tools---Create netlist, generate the device package and schematic one by one corresponding

Tags: cal err miss str picture. dll Net PNG comPCB cycle calculations Use SQL functions to invoke. NET DLL implementations (for code reuse purposes) Played SQL Server database often write stored procedures, functions and so on, when the business logic is too complex, write with SQL is a nightmare, Here the PCB cycle function is written in. NET, using MS SQL to call. NET basic steps to sort out the following 1th step: SQL Server CLR configuration (all