Logic Symbols

By Terry Bartelt

The schematic symbols of logic gates used in digital circuits are shown.

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.

Inductance

This learning activity describes the physical properties that affect the inductance, in henries, of an inductor.

Conductors, Insulators and Resistors

In this animated activity, learners examine why various materials are conductors, insulators, or resistors of current. A short quiz completes the learning object.

Analog Voltmeter Operation

Students follow the procedure to measure voltage with an analog voltmeter. They examine the use of the Function Switch and the Range Switch. A brief quiz completes the activity.

Boolean Theorems (Single Variable)

By Patrick Hoppe

Students analyze the eight single variable Boolean theorems and their expressions.

Op Amp Fundamentals: The Operational Amplifier

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

Zener Diode Voltage Regulation

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.

Series RL Circuit Vector and Circuit Analyzer

By James Bourassa, John Rosz

Learners alter circuit variables and view how these changes affect circuit voltage, current, reactance, impedance, and phase angle.

Voltages Across Series and Parallel Capacitive Circuits

In this interactive and animated object, learners examine how dc voltages develop across capacitors that are connected in series and in parallel.

Current Divider Rule Practice Problems

In this interactive object, learners review the CDR and work nine problems. Immediate feedback is given.

AND Gates

In this learning activity you'll describe the operation of an AND gate by using a truth table, a waveform diagram, a Boolean Algebra equation, a switch analogy, and a written definition.

A Sample Exam for Digital Electronics

Students answer 10 questions in a sample exam. This exercise covers number systems, number conversion, logic gates, and combinational design. Feedback is provided.

The Zener 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.

An Introduction to the Solderless Breadboard

In this learning activity you'll be introduced to the layout and operation of the solderless breadboard.

Inverting Op Amp

In this interactive object, learners examine the operation of an inverting operational amplifier through formulas, tables, and animated illustrations. A brief quiz completes the activity.

Noninverting Op Amp

In this animated object, learners examine the fundamental operation of a noninverting operational amplifier. A brief quiz completes the activity.

Motor Loading

Students view a graphical explanation of how the motor condition (unloaded, 50 percent loaded, fully loaded) affects the phase between voltage and current, the current draw from the AC supply, the amount of power consumed, and the power factor.

Shorts Affecting Current in a Series Circuit

In this learning activity you'll review how a short affects current flow and voltage in a series circuit.

Ignition System of a Combustion Engine

Students view the parts and movements of a combustion engine in this animated activity. Each part is described.

Transistor Fundamentals: Emitter-Biased NPN Transistor

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

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.

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.

DC Current Flow Through a Parallel Circuit

Learners observe current flow throughout the series portion and branches of a parallel circuit. This animated activity includes calculations and a short quiz.

Inductive Reactance Demonstration 1

Learners view video clips showing how coiled wire provides more resistance to AC current flow than uncoiled wire.