It is hard to imagine, but the D-Sub connector is the smallest type of connector used in a computer system. They connect computers to monitors, printers, and floppy drives. Although they are no longer popular in consumer electronics, they are still used in some commercial devices.
Their most powerful function is two screws, which fix the connector in place to form a semi-permanent connection. Their D-shaped metal shields also provide mechanical support to ensure correct orientation and may shield electromagnetic interference. Another advantage of the old electrical connector is that it can carry many pins and sockets. Choose between low density D-subs with two rows of pins/sockets or high-density D-subs with three rows.
One of the few places D-Subs still exist is in RS-232 serial communications. Network ports, computer video output, and game controller ports now feature smaller, more efficient connectors such as HDMI and DisplayPort. Yet, D-Subs have survived these technological advances due to their robust build.
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