Page 29 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards

• Design rules that specify spacing between tracks and all manner of other things

• User-language programs (You can write your own and download programs to extend EAGLE.)
• Scripts that automate EAGLE activities

• CAM (computer-aided manufacturing) jobs that specify how the EAGLE design is converted
into files suitable for PCB fabrication

Load an Example Project

Within a project, the two main files you will be using are the schematic file, which will have the

extension .sch, and the board layout file, which will have the extension .brd.
Navigate down the folders in “Projects” to demo2.brd, as shown in Figure 1-16, and then
double-click both demo2.brd and demo2.sch to open both the board layout and the schematic
(Figure 1-17). Later on, when you are working on a project, you will need to make sure that the

schematic and board files are open for the project, or they can become out of step, leading to all sorts
of problems.

FIGURE 1-17 Example board and schematic files.