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D-sub, D-shaped connectors are contacts designed for electrical connection, made up of two parts that are mated together to form a single connection. D-sub connectors are most commonly found in the computer industry, as they’re commonly used in motherboards and other computer related equipment. The popular D-sub plug, sometimes known as the DB-9 plug, is actually a 9-pin male plug with an L-shaped handle used to quickly plug and unplug the device. The L-shape is designed to reduce the risk of accidental disconnection. The female side of the connector is typically known as a D- Shell, as opposed to the male plug, which is generally known as a D- Plug. A true D-Sub connector is the combination of both a D-Plug and a D-Shell, which together form a complete electrical connection. D- Sub connectors are mainly used for transmitting analog signals, such as video and audio. This type of connection is the most common type used in the computer industry for connecting monitors, keyboards, and other peripherals. It can also be used to connect a range of devices, such as mice, printers, and modems.The working principle of D-sub connectors is quite simple. The electrical connection is formed by two metallic contacts – the male (plug) and the female (shell). The male contact is typically the one with the pins on it, while the female contact is the one with the sockets. When plugged together, these contacts create an electrical connection that allows the data to pass from one device to another. The physical connection of the D-sub connector is actually pretty simple as well. The male contact typically has two pins, which lock into the female contact. The female contact also has two slots that the pins of the male contact fit into. This physical connection is made by pushing the male contact into the female contact until it clicks in place.The most common type used in the computer industry is the DB-9 connector. This type of connector has nine pins and is designed for use with keyboard, mouse, and monitor cables. It is designed to plug easily into the ports found on these devices.In conclusion, D-sub connectors are the most commonly used electrical connectors in the computer industry. They are designed for use with a wide range of electronic equipment, and are simple to connect and disconnect. The physical connection of the D-sub connector involves the insertion of the male contacts into the female contact, while the electrical connection is created when the contacts touch each other and form a complete connection.

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