Sine Wave Fundamentals

By Patrick Hoppe

Learners examine the characteristics of a sine wave and the various ways to describe it including Vp, Vp-p, Vrms, Vavg, and frequency.

The DC Motor

By Terry Bartelt

Learners examine the wiring of the primary components of the three types of DC motors, series, shunt, and compound. The operational characteristics of each type of motor are described. A quiz completes the activity.

An Introduction to the Digital Multimeter

In this learning activity you'll explore the functions and proper operation of a digital multimeter.

Power Factor

Learners read about the concepts of true power, reactive power, and apparent power, and are introduced to the power factor formula. A short quiz completes the activity.

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.

Op Amp Fundamentals: The Non-Inverting Amplifier

Students are introduced to the non-inverting amplifier configuration. The formulas for closed loop gain and bandwidth are shown, and an example is given.

Half-Wave Rectifier

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

Kirchhoff's Voltage Law

Students read a definition of Kirchhoff's Voltage Law and view examples of its use.

The Universal NAND Gate

Students view schematics and truth tables that demonstrate how the AND, OR, and Hex Inverter functions are achieved through the use of only NAND gates.

Transistor Fundamentals: JFET Amplifiers

Students read an explanation of the common-source and source-follower amplifiers. Gain formulas are developed and an example is given.

Demultiplexers (Screencast)

In this animated object, learners examine the operation of a demultiplexer along with the data output and select lines. A brief quiz completes the activity.

Series-Parallel Circuit Analysis Practice Problems: Circuit 2

In this interactive object, learners solve a series-parallel DC circuit analysis problem. Immediate step-by-step feedback is given.

Excel: Spreadsheet Hints

Learners read how to create a spreadsheet to determine the voltage drop across a resistor in an AC circuit. The complex functions explained in other learning objects are used in this example.

The Bridge Rectifier

Learners see how a bridge rectifier converts an AC voltage into a pulsating DC voltage. A brief quiz completes the activity.

The Op Amp Integrator

By Terry Fleischman

The learner will understand the circuit configuration and operation of an integrator op amp.

The Mathematical Expression of an AC Sine Wave As a Function of Time: Practice Problems

Students view the mathematical expression of a sinusoidal waveform with respect to time (t) and solve five problems. The answers are provided so students may check their work.

Total Impedance of a Series Circuit Using Complex Numbers

Students view several examples of how to determine the total impedance of a series circuit. The "j" term is used in all of the calculations.

Capacitors

In this animated object, learners examine the basics of capacitance and capacitors.

Impedance: Parallel to Series Conversion

Students view the formulas to be used to convert a parallel impedance to a series impedance.

Current Source Approximations

Learners examine first and second approximations and view examples of a "stiff" current source.

Voltages Across Series and Parallel Capacitive Circuits (Screencast)

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

The Solenoid

In this interactive lesson, students view the operation of a solenoid and read about its application. A brief assessment concludes the activity.

Parallel Circuit Analysis Practice Problems: Circuit #7

In this interactive object, learners solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated by each resistor.

Oscilloscope Coupling Switch

Learners read a description of the function of the coupling switch on an oscilloscope and how its setting affects measurements of DC, AC, and combined voltages. A brief quiz completes the activity.

Voltage Source Approximations

Students examine the first and second approximations of a voltage source. A "stiff" voltage source is defined, and several examples are given.