Logic State Indicators

By Terry Bartelt

Instructions on how to interpret state indicator symbols for input and output terminals of digital devices is presented.

Boolean Theorems (Multivariable)

By Patrick Hoppe

Students read the multivariable theorems and view the graphic depictions of the Boolean expressions.

The Differentiator Op Amp

In this animated object, learners examine the circuit configuration and operation of a differentiator operational amplifier. A brief quiz completes the activity.

Average Voltages of Pulsating DC Voltages

In this learning activity, learners will learn to calculate the average voltage produced by half-wave and full-wave rectifiers.

The Vertical Portion of the Sine Wave

In this animated lesson, learners examine sine waves and alternating current. A brief quiz completes the object.

Series RC Circuit Vector and Circuit Analyzer

By James Bourassa, John Rosz

In this teaching and learning aid, the user can alter circuit variables and view how these changes affect circuit voltage, current, reactance, impedance, and phase angle.

Oscilloscope Frequency Measurements

Learners read a description of how an oscilloscope is used to measure the frequency of a sine wave.

Energizing Time Constants of an RL Circuit

In this animated object, students view an explanation of how current, voltage, and the magnetic field strength of a series RL circuit change during five time constants. A brief quiz completes the activity.

Power Law Practice Problems #3

Learners review the three formulas for power and work 12 problems. In each of the problems, students are given two of the three variables (voltage, resistance, or current) and asked to solve for power. Immediate feedback is provided.

Series-Opposing Zener Diodes

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.

Internal Elements of a 555 Timer

In this highly interactive object, learners examine the internal elements of a 555 IC and their operation. Learners then test their knowledge in a variety of exercises.

An Impedance Matching Application

Learners consider why an impedance matching transformer is needed to connect an antenna to a television.

The MOD Number

Learners read how to calculate the MOD number and how it is used.

Transistor Fundamentals: Collector Saturation and Collector-Emitter Cutoff

Students read about the concepts of saturation and cutoff. They view diagrams that illustrate the interaction of the load line and the family of curves.

The Transistor Symbol

In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.

Voltage Drops in a Series Circuit

Students study the concept that the voltage drop across a series circuit resistor is proportional to its resistance. They then complete a brief quiz.

Reversing the Rotation of DC Motors

By Terry Bartelt, Terry Fleischman

Learners view animations showing how to change the connections to cause a DC motor to reverse its rotation. A short quiz completes the activity.

Voltage Dividers

In this learning activity you'll determine the voltages that can be topped off of a multi-resistor voltage divider that has one main power source.

Thevenin Resistance: Practice Problems

Students work five practice problems to determine the Thevenin resistance of DC circuits.

Digital-to-Analog Converters

In this animated activity, learners examine how an electronic converter changes digital signals to analog signals. Sections of a synthesizer are identified, and the operation of a D/A converter is demonstrated.

Current in a Series Circuit

In this learning activity you'll determine what happens to current flow in a series circuit when the resistance is changed.

Transistor Fundamentals: Emitter-Biased NPN Transistor

Students view a dc analysis of an emitter-biased NPN transistor.

Op Amp Fundamentals: The Operational Amplifier

Students read about the characteristics of the ideal operational amplifier and compare them with the industry standard LM741C.

Basic DC Electrical Motor Construction

Learners examine the internal parts of a DC electrical motor and then text their knowledge in a drag-and-drop exercise.

The Thevenin Theorem

This animated object allows students to examine the four steps used to reduce a complex circuit to a simple series circuit.