This lab has the student build a circuit that converts a 120 volt alternating voltage into a 5 and 12 volt DC (direct current) voltage level. In order to do this, you will need to use a transformer to reduce the alternating voltage from 120 to 12 volts. This 12 voltage alternating voltage must then be converted to a 12 volt constant (DC) voltage through a special diode-capacitor circuit called a full-wave rectifier circuit. The 12 volts delivered by the rectifier circuit must then be stepped down to a fixed five volt level using a voltage regulator.