An AC-DC Converter is an electronic device that transforms alternating current (AC) into direct current (DC). This conversion is essential for powering electronic devices that require a stable and constant voltage, such as computers and smartphones. The process typically involves rectification, where the AC waveform is modified to produce a unidirectional flow of current. These converters can be found in various forms, including rectifiers, which are the simplest type, and more complex systems like switching power supplies. They play a crucial role in modern electronics, enabling the efficient use of electrical energy in a wide range of applications.