There are many uses of capacitors, mainly as follows:

1. DC blocking: The function is to prevent DC from passing and allow AC to pass.

2. Bypass (decoupling): Provide a low-impedance path for some components connected in parallel in the AC circuit.

3. Coupling: As a connection between two circuits, allowing AC signals to pass through and be transmitted to the next circuit

4. Filtering: This is very important for DIY. The capacitors on the graphics card basically do this.

5. Temperature compensation: In view of the impact of other components’ insufficient adaptability to temperature, compensation is made to improve the stability of the circuit.

6. Timing: The capacitor is used in conjunction with the resistor to determine the time constant of the circuit.

7. Tuning: System tuning for frequency-related circuits, such as mobile phones, radios, and televisions.

8. Rectification: Turning on or off a semi-closed conductor switching element at a predetermined time.

9. Energy storage: store electrical energy and release it when necessary. Such as camera flash, heating equipment and so on.

The above are the main uses of capacitors