


Over time, especially after the PCB was invented, the process of linking every component and net between the schematic and physical implementation became a massive part of the electronics design process. Through a combination of drafting tools, stencils, and careful manual process – a circuit diagram was drawn. The first circuits were created before the Printed Circuit Board (PCB) was invented, and schematics were drawn by hand.

Function 3 – Schematic Design Rule Checks (DRC).
