Does rectification of AC into DC with the use of diodes always create a fluctuating DC wave? Are there methods of rectification which create a steady DC current or do you always have to smooth the current out afterwards? I'm having a hard time grasping the concept of half-wave and full-wave rectification. Are there any advantages to half-wave rectification or is it only used because it's a simpler method of rectification? Wikipedia has good diagrams of half-wave and full-wave rectification circuits.