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software:eagle_cadsoft

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Eagle cadsoft

This page is about Eagle1) Cadsoft, a computer program which helps designing schematic diagrams (schematics) and circuit boards (pcb)2).

Using Custom Libraries

During a design process it is sometimes necessary to add components which are not available in the ready supplied libraries. For this, components can be created manually and imported in the design. The method for this requires some fundamental understanding how components are organized in Eagle, both in the application itself as on disk. Guidelines about library design and some criteria about a consistent nomenclature should help a user to successfully manage such components, upgrade or extend them with other packages, ultimately to keep a good overview.

Libraries within Eagle

In the Control Panel within Eagle, one or more library folders may contain libraries with a long list of IC manufacturers, group of generic components or group specific symbols which can be browsed through.
When opening an existing library3), one will observe that an item in such a library has for each device or device breed (i.e. equivalent components sharing the same functions but having different packages and/or symbols) three entities primarily:

  • device: The real component, residing in a specific package with a specific symbol
  • package: Footprint in the layout
  • symbol: Drawing in the schematic

Each of these three entities characterize a specific aspect of a component residing in a library, either directly or within a group of a component breed.

1)
Easy Applicable Graphic Layout Editor
2)
Presuming one has the correct license for that
3)
a file with an .lbr extension, residing in a library folder
software/eagle_cadsoft.1307488717.txt.gz · Last modified: 2011/06/08 01:18 by admin