DC (Direct Current) power supply is a device that provides a stable DC voltage to power various electronic devices and components. Unlike AC (Alternating Current), which alternates direction, DC voltage flows in a single direction, making it ideal for most electronic circuits. DC power supplies are commonly used in a wide range of applications, including testing, development, laboratory experiments, and powering electronic devices. DC power supplies. They work by using a transformer to convert high-voltage AC into low-voltage DC, followed by rectification and filtering to smooth the signal. Linear regulators are then used to maintain a constant DC output.Low noise and stable output.Inefficiency, especially at higher output voltages or currents, as excess energy is dissipated as heat.