A circuit diagram refers to a layout diagram that uses physical and electrical standard symbols to represent the composition and connection relationships of various electronic components.
Circuit diagram symbols are the basis for drawing circuit diagrams, roughly divided into six categories: power and battery, switches and relays, basic circuit symbols, limiting symbols, semiconductor devices, and transmission paths. Only by understanding the meanings represented by the corresponding circuit diagram symbols can one easily draw and ensure the effective implementation of circuit diagrams.

The value of circuit diagrams
1. The short-circuit diagram is a prerequisite and implementation standard for the effective operation of a circuit. Only by simulating the operation of the circuit diagram can the feasibility of the project be judged.
2. Circuit diagrams are widely used in engineering planning and circuit research fields. By analyzing circuit diagrams, the working principles between electronic components can be understood, and planning solutions can be provided for performance, installation circuits, and electronic and electrical products.
3. The circuit diagram plays a guiding role in the implementation process of the entire circuit. Using the circuit diagram for circuit design, it can be drawn on paper or on a computer during the design process, and the circuit diagram can be continuously improved through repeated testing to ensure its normal operation. After confirming its correctness, it can be implemented.

How to draw a basic circuit diagram?
Circuit diagrams are mainly composed of physical and electrical standard symbols. The complete set of circuit diagram symbols is convenient for users to choose at any time, helping them complete tasks more efficiently. It is best to draw circuit diagrams in a box shape for easy reading and understanding. Yitu Diagram has a massive collection of drawing resources, including six major circuit symbols, making it convenient for users to choose and use. Taking Yitu Diagram as an example, we will demonstrate how to draw a basic circuit diagram.  
Step 1: Open the Yitu diagram, click on "New" → "Engineering" module → "Circuit Engineering" → "Basic Circuit Diagram", and place the circuit components in the corresponding positions of the circuit diagram according to the order and rules of circuit operation. Note that the distribution of the original components should be even and not placed at corners.

Step 2: Use transmission path symbols to connect various components according to the direction of the circuit processing flow in the circuit diagram.

Step 3: Design and refine the circuit diagram according to the requirements.

Step 4: Check the entire circuit diagram according to the circuit operation process, identify erroneous circuits during operation and make corrections to ensure the accuracy and feasibility of the circuit diagram. You can share the drawn circuit diagram with others or export and save it locally in format.