Power supply circuits are used in various electrical and electronic devices. A power supply is an electrical device that supplies an electric load to an electric load. The primary function of a power supply is to convert the electric current from one source to the correct voltage, current, and frequency to load electricity. As a result, power supplies are sometimes related to electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load devices they deliver power to.
Power supply circuits are classified into various types, based on the power provided to the circuit or devices. For example, microcontroller-based circuits are normally 5V DC regulated power supply (RPS) circuits, which can be designed with the help of various methods to convert energy from 230V AC to 5V DC.