smoothing capacitor

In the process of converting AC voltage into stable DC voltage, when the rectifier circuit converts it into a unidirectional DC voltage using diodes, the voltage level is not yet constant. Therefore, a smoothing circuit is used to convert the fluctuating DC voltage into a stable DC voltage of constant magnitude. The smoothing circuit consists of a capacitor, coil, and resistor, and the capacitor is called a smoothing capacitor. The smoothing capacitor plays the role of stabilizing by charging during parts of the voltage that are higher than the average value of the rectified DC voltage and discharging during parts that are lower than the average value.