This model shows how a set of four diodes can be used to convert an a.c. signal to a d.c. signal for the whole a.c. cycle; this is full-wave rectification. A capacitor is then included in the circuit to demonstrate its action in smoothing the d.c. signal.

This item teaches:

• about direct current
• about capacitors
• about alternating current
• about the use of a capacitor to block the d.c. component of a mixed a.c./ d.c. signal
• about the use of diodes to convert an alernating current to a direct current