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.

Series-Opposing Zener Diodes

By Terry Bartelt

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.

Charging Time Constants of an RC Circuit (Screencast)

In this animated object, students view an explanation of how current, voltage, and the charge on a capacitor of a series RC circuit change during five time constants. A short quiz completes the activity.

The Current Divider Rule (CDR) with Complex Numbers

By Patrick Hoppe

Students view a demonstration of the Current Divider Rule with the use of complex numbers. Examples are given.

Transistor Fundamentals: AC Models

Students read about the four steps to creating an ac model and view examples.

An Algorithm for Converting a Decimal Number to a Hexadecimal Number

By Kevin Ritzman

In this animated activity, learners examine a systematic method for converting a decimal number (base 10) into a hexadecimal number (base 16).

AC Voltage Conversion Problems

By John Rosz, Terry Bartelt

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

The Optocoupler

In this animated object, learners examine the operation of an optocoupler, specifically how it is connected to external components to provide interfacing and isolation and how it responds to excessive frequencies. A quiz completes the activity.

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.

The Semiconductor Diode

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.

Synchronous & Asynchronous Inputs on a JK Flip-Flop

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

Voltage Divider Rule (VDR)

By Terry Fleischman, Patrick Hoppe

Students review the Voltage Divider Rule and work practice problems.

Parallel Inductance: Practice Problems

Students work nine practice problems to determine the total inductance of a parallel circuit. Immediate feedback is given.

The Neutral Current of an Edison Wire System

Learners take a close look at the Edison Wire System and observe how the current values through the two lines and the neutral of the system change as the loads vary.

The 4-Input Truth Table

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

The DC Shunt Motor

Learners examine the operation of a DC Shunt motor and its characteristics. A quiz completes the activity.

AC Voltage Conversions

In this animated object, learners examine the formulas used to convert peak, RMS, average, and peak-to-peak AC voltages. A brief quiz completes the activity.

Voltage Waveforms in an Edison Three-Wire System

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

Op Amp Fundamentals: The Transconductance Amplifier

Students read an introduction to the transconductance amplifier. They also view formulas for voltage-to-current conversion, closed-loop input, and output impedance. An example of how R1 controls the conversion factor is given.

Op Amps 3: The Inverting Amplifier

By Todd Van De Hey

Describe the inverting op-amp configuration and calculate the circuit gain.

Resistor Color Code Description

In this interactive activity, students read about the colored stripes on a resistor and interpret the placement of those colors to determine the value of four-band resistors.

Oscilloscope Frequency Measurements

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

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.

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.

The MOD Number

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