This learning object introduces the three approximations of a diode.

In this interactive and animated object, learners practice testing a diode. They determine if a diode is good, open, or shorted.

In this interactive object, learners examine the PN sections of a diode and the diode's forward- and reverse-biased operations. A brief quiz completes the activity.

Students complete 10 practice problems. These deal with the determination of series current, zener current, and load current, and if the zener diode is operating in the breakdown region.

In this interactive and animated object, learners examine the operation of a semiconductor diode when it is forward and reverse biased. A brief quiz completes the activity.

Students read about the operation of the zener diode. This activity includes the ideal zener, the breakdown operation, the calculation of series, and zener and load current.

In this animated and interactive object, learners examine how changes in applied voltage affect the current and voltages in a zener diode voltage regulation circuit. A short assessment completes the activity.

The learner will understand how a zener diode maintains a constant voltage as the resistance values of a load change.

This primer introduces the student to the key terms and concepts associated with the silicon diode.

In this animated object, learners examine the operation of a zener diode in the forward and reverse bias conditions. A quiz completes the activity.

Students read about light-emitting diodes, including LED voltage and current, and how to protect against reverse voltage.

In this animated and interactive object, learners study how a DC circuit, consisting of a diac, a capacitor, and two resistors, causes a light-emitting diode to turn on and off. A brief quiz completes the activity.

In this interactive and animated object, learners examine the SUN VAT-40 battery starting and charging system tester. This learning object demonstrates the use of the tester in diagnosing conventional 12-volt automotive charging systems. It contains audio.

In this animated and interactive object, learners examine the voltages that develop across two series zener diodes, which are connected in opposite directions, when DC and AC voltages are applied across them. A brief quiz completes the activity.

Learners view the operation of a full-wave rectifier which has two diodes.

In this animated learning object, students read about the operation of a half-wave rectifier.

Students examine the full-wave rectifier. They review appropriate formulas and examples of actual circuits.

This primer introduces the student to the half-wave rectifier. Both the 1st and 2nd approximations are examined.

Learners examine the circuitry in a DC variable speed drive that protects the rectifier diodes and motor windings from being damaged due to excessive current.