Parent page: Schematic Objects
A part is an electrical design primitive. It is a schematic symbol that represents an electronic device, such as a resistor, a switch, an operational amplifier, a voltage regulator, etc. Parts are stored within components in schematic component libraries. Note that each component can contain one or more parts. As well as a symbolic representation of the component, the part also includes links to models, such as the PCB footprint; and also parameters, used to document details such as component parameters and supplier information. How the model links and parameters are added to the part depends on the type of library storage being used.
Parts are available for placement in both schematic and schematic library editors:
The way in which a part is placed on a schematic sheet depends on how and from where placement mode is invoked.
In the schematic editor, the part selection and placement process is done from the Libraries panel. If the panel is not visible, click System » Library to display it.
If you cannot locate the required part in the Libraries panel, use the Search feature. To do this, click Search to open the Libraries Search dialog.
A part can also be placed directly from a library that is open the schematic library editor from the SCH Library panel. If the panel is not visible, click SCH at the bottom right of the workspace to enable it. Note that:
Graphical editing for a part is limited to moving, rotating and mirroring. When a part is selected in the workspace, a dashed selection box will appear around it. For each text field associated with the part (Designator, Comment, plus any visible user-defined parameters) a dashed line will be visible, connecting the text field to the body of the part, indicating association. To graphically manipulate a selected component:
A selected Part.
The software includes tools to help work between the component on the schematic and that same component on the PCB. These tools include Cross Probing, Cross Selection, and Selecting the PCB Components from the schematic.
As the name implies, Cross Probe allows you to click on a component in one editor and jump to that component in the other editor. To Cross Probe:
Cross Select Mode selects the same component in the other editor. Note that it does not zoom and center. Cross Selection is a mode and is either on or off. To access Cross Select Mode:
This feature allows you to select multiple schematic components in a specific order, then place those same components in the PCB editor in the same order. To use this feature:
Dialog page: Properties for Schematic Component
This method of editing uses the Properties for Schematic Component dialog to modify the properties of a part object.
The Properties for Schematic Component dialog can be accessed prior to entering placement mode from the Schematic – Default Primitives page of the Preferences dialog. This allows the default properties for the part object to be changed, which will be applied when placing subsequent parts.
During placement, the dialog can be accessed by pressing the Tab key.
After placement, the dialog can be accessed in one of the following ways:
An Inspector panel enables the designer to interrogate and edit the properties of one or more design objects in the active document. Used in conjunction with appropriate filtering - by using the applicable Filter panel, or the Find Similar Objects dialog - the panel can be used to make changes to multiple objects of the same kind, from one convenient location.
A List panel allows the designer to display design objects from one or more documents in tabular format, enabling quick inspection and modification of object attributes. Used in conjunction with appropriate filtering - by using the applicable Filter panel, or the Find Similar Objects dialog - it enables the display of just those objects falling under the scope of the active filter – allowing the designer to target and edit multiple design objects with greater accuracy and efficiency.
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