Pcb Schematics

[Rosalia Kemme]

A KiCAD project is for one gerber plot.
That gerber plot can contain several boards on it, if you manage to keep them apart, usually via hierarchical sheets for the schematics and via mousbites/etc. for the fabricated boards.
The KiCAD project folders contain all necessary bits for that gerber plot.

A schematic, or schematic diagram, is a designed representation of the elements of a system using abstract, graphic symbols rather than realistic pictures. A schematic usually omits all details that are not relevant to the key information the schematic is intended to convey, and may include oversimplified elements in order to make this essential meaning easier to grasp, as well as additional organization of the information.

For example, a subway map intended for passengers may represent a subway station with a dot. The dot is not intended to resemble the actual station at all but aims to give the viewer information without unnecessary visual clutter. A schematic diagram of a chemical process uses symbols in place of detailed representations of the vessels, piping, valves, pumps, and other equipment that compose the system, thus emphasizing the functions of the individual elements and the interconnections among them and suppresses their physical details. In an electronic circuit diagram, the layout of the symbols may not look anything like the circuit as it appears in the physical world: instead of representing the way the circuit looks, the schematic aims to capture, on a more general level, the way it works. This may be contrasted with a wiring diagram, which preserves the spatial relationships between each of its components.

A semi-schematic diagram combines some of the abstraction of a purely schematic diagram with other elements displayed as realistically as possible, for various reasons. It is a compromise between a purely abstract diagram (e.g. the schematic of the Washington Metro) and an exclusively realistic representation (e.g. the corresponding aerial view of Washington).

In electrical and electronic industry, a schematic diagram is often used to describe the design of equipment. Schematic diagrams are often used for the maintenance and repair of electronic and electromechanical systems.[1] While schematics were traditionally drawn by hand, using standardized templates or pre-printed adhesive symbols, today electronic design automation software (EDA or "electrical CAD") is often used.

In electronic design automation, until the 1980s schematics were virtually the only formal representation for circuits. More recently, with the progress of computer technology, other representations were introduced and specialized computer languages were developed, since with the explosive growth of the complexity of electronic circuits, traditional schematics are becoming less practical. For example, hardware description languages are indispensable for modern digital circuit design.

Schematics for electronic circuits are prepared by designers using EDA (electronic design automation) tools called schematic capture tools or schematic entry tools. These tools go beyond simple drawing of devices and connections. Usually they are integrated into the whole design flow and linked to other EDA tools for verification and simulation of the circuit under design.

In electric power systems design, a schematic drawing called a one-line diagram is frequently used to represent substations, distribution systems or even whole electrical power grids. These diagrams simplify and compress the details that would be repeated on each phase of a three-phase system, showing only one element instead of three. Electrical diagrams for switchgear often have common device functions designate by standard function numbers. Another type of diagram used for power systems is a three-line diagram.

For analysis purposes of a power system, from the one-line diagram, if the system is balanced, an equivalent per-phase (or single-phase) schematic diagram can be obtained. If all of the parameters are represented as impedances and voltage sources, the equivalent per-phase schematic diagram is called an impedance diagram. If all of the parameters are represented as admittances and current sources, the equivalent per-phase schematic diagram is called an admittance diagram.

If the power system is unbalanced, but it is linear (or can be approximated by a linear system), then Fortescue's theorem (symmetrical components) can be applied. In this way, from the one-line diagram, three different per-phase schematic diagrams are obtained, known as sequence diagrams: positive sequence diagram, negative sequence diagram, and zero sequence diagram. Each of these diagrams can be represented as an impedance diagram or as an admittance diagram.

Schematic diagrams are used extensively in repair manuals to help users understand the interconnections of parts, and to provide graphical instruction to assist in dismantling and rebuilding mechanical assemblies. Many automotive and motorcycle repair manuals devote a significant number of pages to schematic diagrams.

I am working on a bigger project where I need to produce several PCB boards. I created a new project within I build the schematics. Now I would like to produce one Board after the other. Unfortunatelly I don't get the DRC and netlist function working?

Yes, you can have more than one board within one project. Additional boards would be 'schematic' - currently you have only SCHEMATIC1. Create a new schematic by right clicking on dsn file name (I think) and select New Schematic...this will be a new folder. Pages can be added to this new schematic as usual. To switch between schematics, right click on the schematic (folder) > select Make Root

That's the information I needed. I always created several pages (PCBs) in the Schematic1 folder and was wondering about all the DRC and Netlisting errors. 1 Schematicfolder = 1 PCB Board - it's just as easy as this.

When we have multiple schematics for multiple boards, can we create intersheet references for each board? When I create intersheet reference through Tools->Annotate , it creates intersheet references for only the root schematic. Can you let me know, how we can add intersheet references for each schematic in a multiple schematic configuration?

Though, In my multiple schematic configuration. Tools-->Annotate...In the annotate diaglog box,under Packaging tab, the scope with "Update Selection" and "Update Entire Design" is disabled when I select the add intersheet reference .

Hi I'm looking into ways of creating more intelligent MEP schematics. Current we do 2D schematics in AutoCAD that have to be checked against the model and for large projects checking all the references and pipe sizes can be very time consuming.

There seems to be ways of linking schematics drawn in AutoCAD P&ID and mapping some of the information from the schematic to Revit, but this seems to be just a single direction map from the P&ID drawing to Revit. Having not used AutoCAD P&ID before I'm not sure if this is the direction to go. Are there ways of inserting a P&ID drawing into a drafting view and linking to Revit model elements?

I've seen people have created some links between model and drafting views using dynamo, however for piping schematics a large amount of the information will be pipe sizes, gradients etc. I have little knowledge of dynamo so not sure what is possible.

Before I do, you or your company need to assess the following before going down this route. I went through the exercise a couple of years back to build detail item families, with a bit of intelligence behind it and created a company specific process and guidelines. This is a time consuming process and custom API's (or other methods out there) are required to link 2D detail instances to the same 3D instance and then there are still areas where manual drafting is required. Overall, for me, schematics in Revit just makes sense, it works better for me than having to navigate between Revit and CAD and it saves time etc.

Now, before building a bunch of detail items (schematic symbols) for all MEP disciplines, I would look into other solutions which is readily available (at a price). The price will be less than the time it will take some to build and maintain everything.

Thanks for the reply, although we currently have MagiCAD we don't have the schematic license and I've been told that the company don't wish to continuing using it as it's too expensive. Personally I think it's the way to go as it has most of what we need in terms of pipe sizing etc. I've just got to convince the powers above.

Convincing the powers above can be a mission, but if the numbers add up they might just be willing to go down a certain path. Do a feasibility assessment, trail some of the off the shelf solutions. Remember, not all users would require licenses to the schematic functionality in 3rd party packages.

Hello, would you mind telling me the process you talked about here " I went through the exercise a couple of years back to build detail item families, with a bit of intelligence behind it and created a company specific process and guidelines. This is a time consuming process and custom API's (or other methods out there) are required to link 2D detail instances to the same 3D instance and then there are still areas where manual drafting is required." Trying to create a link between 2D items in a schematic and 3D modeled elements.

I've been investigating the nrwl extensions and they look great. However, when I'm following their tutorial for Workspace Specific Schematics, the last step doesn't show me the command to run. Can you tell me how I run the schematic I created? I'm sure it's simple, but I can't find the command anywhere.

The Nx generator for schematics doesn't do everything it needs to do to have your schematic work. What I have learned below is from creating a blank schematic in another directory by following this blog post by the Angular Team, which I recommend following to understand Schematics in general.

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