An AC Power Supply is a device that provides alternating current (AC) electricity to power various electrical devices. Unlike direct current (DC), which flows in one direction, AC changes direction periodically, making it suitable for powering homes and businesses. Most household appliances, such as refrigerators and televisions, rely on AC power for operation. The primary source of AC power is the electrical grid, which generates electricity at power plants and distributes it through transmission lines. In addition to the grid, AC Power Supplies can also be found in devices like uninterruptible power supplies (UPS), which provide backup power during outages, ensuring that essential equipment remains operational.