Schematic capture

Schematic capture is the essential first step in electronic design, where engineers use software (a schematic editor) to create a digital, visual diagram of a circuit by placing components and defining electrical connections ("nets"). It converts a design concept into a computer-readable format for simulation and PCB layout.

Key Aspects of Schematic Capture
Creation of Nets: Defines logical electrical connections between component pins.
Symbol Libraries: Utilizes, at times, thousands of standard component symbols.
Design Rules Check (DRC): Automated verification ensures the design is functional and free of errors before layout.
Documentation: Generates the Bill of Materials (BOM) and acts as the project's blueprint.

Common Tools
KiCad: Free, open-source, and widely used for all design complexities.
Altium Designer: Known for professional-grade, advanced PCB design features.
Proteus: Strong in simulation and 3D modeling.
Cadence Allegro/OrCAD: Often used for complex, high-speed designs.