Diode Approximations

By Patrick Hoppe

This learning object introduces the three approximations of a diode.

A Drill for Converting Binary Numbers to Decimal Numbers

By John Rosz

Students test their skill at converting binary numbers to decimal numbers. Immediate feedback is provided.

Transistor Fundamentals: Voltage-Divider Biased NPN Transistor

Students view drawings of the dc analysis of a voltage-divider biased NPN transistor.

Active Region Operation of a Transistor

By Terry Bartelt

Learners view the operation of an NPN transistor in the active region.

How Current Requires Voltage

This learning activity uses a water pressure analogy to present the concept that voltage pressure is required to cause current flow.

Interpreting the Resistor Color Code

Students examine how to interpret resistor color code bands to determine resistance values and tolerance ranges. This interactive learning object has audio content and includes exercises.

Inductor Series - Parallel: Practice Problems

Students complete 10 practice problems.

Transistor DC Analysis Practice Problems: Circuit #1

Learners analyze a base-biased npn transistor circuit. A "help" screen is available.

Difference Op Amp

Learners examine the fundamental operation of a difference operational amplifier. A brief quiz completes the activity.

The Electrostatic Charge of a Capacitor

In this animated activity, learners examine the conversion of electrical energy into an electrostatic charge within the dielectric material of a capacitor.

The Magnetron Ignition System

Learners read an explanation of how the Magnetron Ignition System uses a solid state switching component, a step-up transformer, and magnetism to provide a high voltage spark in a one-cylinder combustion engine.

Synchronous & Asynchronous Inputs on a JK Flip-Flop

Students examine the operation of synchronous and asynchronous inputs on a JK Flip-Flop.

The Transistor Switch

The learner views the operation of a transistor switching from saturation to cutoff. A brief quiz completes the activity.

The Triac

Learners study the fundamental operation of a triac, particularly how it is turned on and off. A brief quiz completes the activity.

The 555 Astable Multivibrator

Learners observe the animated operation of an astable mulivibrator using a 555 IC (integrated circuit) chip and external components.

The Zener Diode: Practice Problems

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.

A Sample DC/AC I Exam

Students complete a sample exam for DC/AC I. It provides an overview of the material presented in the course.

Voltage and Current Amplitudes in a Series RLC Circuit

Learners examine how voltages and currents vary in a series RLC circuit as the applied frequency changes.

Apparent Power

Learners read an explanation of the concept of apparent power in a power distribution system involving motors, generators, and transformers. A quiz completes this interactive lesson.

Inductors

Learners read a description of inductors and view examples of inductors in series and in parallel.

Kirchhoff's Current Law - Parallel Circuits

In this learning activity you'll explore Kirchhoff's Current Law and view examples of its application.

The 4-Input Truth Table

In this learning activity you'll practice using the 4-input truth table.

Operation of Full-Wave Bridge Rectifier

By Matthew Treu

In this learning activity you'll explore the operation of a full-wave bridge rectifier circuit.

Waveforms of an SCR Circuit

Learners view waveforms at various locations of an SCR circuit controlling the intensity a light bulb. The waveforms are shown when the light is dim, at medium brightness, and at full brightness. A brief quiz completes the activity.

Current Divider Rule (CDR)

Students review the Current Divider Rule (CDR) and work practice problems.