Schematic Capture
You are probably very familiar with various schematic symbols and diagrams. A schematic is merely a collection of electronic symbols connected together with virtual “wires.” The main reason you need a schematic when fabricating a printed circuit board is to provide input (a netlist) to your layout and routing tool. A netlist is a file, usually ASCII text, which defines the connections between the components in your design. Other uses for a schematic when fabricating boards include documentation, archiving, and the automatic generation of a bill of materials (BOM).
If your design is simple, you may not need to generate a schematic and it is possible to skip this step and proceed directly to layout and routing of the ...
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