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D-Sub connectors, also referred to as D-shaped connectors, are a type of electrical connector commonly used in the field of computer peripherals. The two halves of the connector fit together in a symmetrical fashion, forming a “D” shape that provides the user with a secure connection between two devices. D-Subs are mainly used for attaching monitors, keyboards, and mice to a computer, as well as providing a connection to external drives like USBs and other input and output peripherals.The most common type of D-Sub connector is the DB-25, which features two rows of 13 pins for audio and data transfer. DB connectors are also commonly used for other applications such as industrial control systems, networking equipment, and telecommunications. Other less common types of D-Sub connectors are the DE-15, which features three rows of five pins, and the DE-9, which is used mainly for serial communications.The working principle of a D-Sub connector is fairly simple. The two halves of the connector are mated and held together by a spring-loaded locking tab. This ensures that both connectors are securely fastened and that the electrical connection between them remains strong. When connecting the two halves of a D-Sub connector, the two pins will line up securely. Once the pins are aligned, the user can secure the connection by pushing the locking tab into the connector, which will activate a inner clip that locks the two halves together.D-Sub connectors are also available in several different sizes, ranging from small two-pin connectors up to large 25-pin connectors. Each version is designed for a specific type of need, and the user must select the size that best fits their application. D-Sub connectors are also designed to be easily disassembled for maintenance or replacement.D-Sub connectors are an essential part of any computer system, and they provide a secure and reliable connection between two devices. They are very easy to use, making them the preferred choice for a variety of applications. D-Sub connectors are a popular choice in the field of computer peripherals and can help ensure that the user is able to get the most out of their system. By understanding the application field and working principle of these connectors, the user can make sure they are using the right type of connector for the job.