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DC Barrel Jack - 2.1 mm
The DC Barrel Jack, with a diameter of 2.1mm, is a type of power connector commonly used to provide DC power to various electronics. It consists of a cylindrical jack that accepts a matching plug and is used for providing a reliable, secure and convenient connection for power supply. The 2.1mm diameter size is widely used in various devices such as laptops, wall adapters, and development boards. In academic settings, the DC Barrel Jack is a common component in electronics projects and is used to supply power to microcontroller boards, LED arrays, and other low-power devices