Component Diagrams - See Examples, Learn What They Are How to Draw a Component Diagram Take stock of everything needed to implement the planned system. For example, for a simple e-commerce system, you'll need components that describe products, orders, and customer accounts. Create a visual for each of the components. Describe the organization and Connections - Components for Circuit Diagram Connections tell Circuit Diagram where the valid points on your component are for other components to connect to. Connections are defined as lines, along which any point is considered a place where another component can connect. All connections are placed within the <connections> tag. You may want connections to be available only if certain conditions are met.