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D-Shaped Connectors - Centronics, often referred to as Centronics connectors, are a type of electrical connector commonly used to connect computers to other peripherals, such as printers. The Centronics connector was developed in 1976 by Centronics Corporation and is still widely used today.

The Centronics connector is a six- to eight-pin connector, typically on a 40-pin ribbon cable. The connector is D-shaped, meaning that the two sides of the connector are curved in opposite directions. The back of the connector has protruding metal pins that correspond to a set of receiving holes on the device being connected. The Centronics connector is designed to have a self-locking system, which ensures a tight connection and prevents accidentally disconnection.

The most common applications of the Centronics connector are in computers and other electronic appliances. The connector is used to connect a variety of peripherals, such as printers, scanners, and external hard drives. It can also be used to connect a computer to a network, as it is used as an Ethernet interface. Additionally, the connector can be used to connect to peripheral hubs, such as USB hubs, as well as to connect computer peripherals to a motherboards.

The working principle of the Centronics connector is based on the concept of a detent. When the two sides of the connector are connected, the pins on the back of the connector enter the receiving holes on the device. This creates a detent, which ensures that the connection stays secure.