Circuit Design also known as Schematic Diagram or Schematic Capture or Circuit Diagram.Circuit design is the first step for every electronics design project and requires the creation of a schematic diagram. The schematic defines how the pins of electrical components are logically connected together on a printed circuit board (PCB). When the circuit design is complete, engineers can use their schematic to perform SPICE simulations or translate their schematic into a PCB design software.

The PCB schematic is the first part of designing a printed circuit board. It’s a pictorial representation, either written or on a computer, that utilizes agreed-upon symbols to describe circuit connections. It also indicates the components that will be used and how they are connected. Anyone should be able to pick up and read the PCB schematic. The PCB schematic is a plan, a blueprint.