A bench power supply is a device used to provide electrical power to various electronic components and circuits during testing and development. It allows users to adjust voltage and current levels, making it versatile for different applications. Typically found in laboratories and workshops, it can supply both direct current (DC) and alternating current (AC) as needed. These power supplies often feature multiple output channels, digital displays, and safety protections to prevent overloading. They are essential tools for engineers and hobbyists working with electronic circuits, prototyping, and testing devices, ensuring that components receive the correct power for optimal performance.