EAGLE (Easily Applicable Graphical Layout Editor) is an ECAD program produced by Cadsoft in Germany.It is very commonly used by private electronics enthusiasts,
because there is a very usable free demo version for nonprofit use and is available in English and German.
Cadsoft has released versions for Microsoft Windows, Linux, and Mac OS X. EAGLE provides a schematic editor, for designing circuit diagrams and a tightly integrated PCB layout editor, which automatically,starts off with all of the components required by the schematic. Components are manually arranged on the,board, with the help of colored lines showing the eventual connections between pins that are required by,the schematic, to aid in finding a placement that will allow the most efficient track layout. It also,provides a good auto router, which once the components have been placed will attempt to automatically find,an optimal track layout to make the electrical connections. It does not always manage to find a way of,routing all the signals, although it permits manual routing of critical paths such as power and high
frequency lines before letting the auto router handle the other connections.
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