An ATX power supply is a standardized power unit originally designed for desktop computers. It converts AC power from wall outlets into multiple DC voltages required by computer components, such as the motherboard, drives, and peripherals. Its design includes built-in safety features, connectors for various devices, and efficient cooling. While primarily used in PCs, ATX power supplies are now popular in hobby electronics and DIY projects for their ability to provide stable, multiple voltage outputs. Their reliability, availability, and standardized connectors make them a versatile choice for powering various electronic devices beyond computers.