1. Familiar with basic components: First of all, you need to know the common basic components in the circuit diagram, such as resistors, capacitors, inductors, switches, etc. These components are usually represented by specific symbols, such as a wavy line for resistance and two parallel lines for capacitance.
2. Understand the current direction: In the circuit diagram, the current usually flows from the positive electrode to the negative electrode. You need to know the working process of the circuit according to the direction of the current. If the current flows from left to right, then this circuit is a forward bias circuit; If the current flows from right to left, then this circuit is a reverse bias circuit.
3. Analyze the circuit structure: The circuit diagram is usually composed of multiple components, and you need to analyze the connection relationship between these components. For example, a series circuit means that the current passes through each element in turn, and a parallel circuit means that the current passes through each element at the same time.
4. Apply Ohm's Law: Ohm's Law is the basis of circuit analysis, which tells us the relationship among voltage, current and resistance. By applying ohm's law, you can calculate the voltage, current and resistance in the circuit.
5. Applying Kirchhoff's law: Kirchhoff's law is another important tool in circuit analysis, which includes two laws: Kirchhoff's first law and Kirchhoff's second law. Kirchhoff's first law tells us that the sum of currents flowing into nodes is equal to the sum of currents flowing out of nodes; Kirchhoff's second law tells us that the sum of voltages along the loop is equal to zero. The application of Kirchhoff's law can solve more complicated circuit problems.