Here's a three room circuit diagram. A circuit diagram is a diagram that depicts an electrical circuit in graphical form. A circuit diagram, also known as an electrical diagram, basic diagram, or electronic schematic, is a graphical depiction of an electrical circuit that is simplified. Circuit diagrams are used to design, build, and maintain electrical and electronic equipment. A circuit diagram is a simplified depiction of an electrical circuit's components that uses either photos of the individual sections or standard symbols. It depicts the relative placements of all the elements as well as their relationships to one another. It is frequently used to show an electrician a graphic depiction of the circuit. A basic circuit schematic is depicted in the image below.