Charging Time Constants of an RC Circuit

By Terry Bartelt

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.

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.

Circuit Protection

In this learning activity you'll explore how a fuse de-energizes a parallel circuit when too many lamps are connected to a power outlet.

A Sample Exam for Digital Electronics

By Patrick Hoppe

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

Multivibrators

In this animated object, learners examine three different types of multivibrators: astable, monostable, and bistable. A brief quiz completes the activity.

Transistor AC Analysis Practice Problems: Circuit #1

The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.

Voltage and Current Amplitudes in a Parallel LC Circuit

In this interactive object, learners examine how voltages and currents vary in a parallel LC circuit as the applied frequency changes.

Impedance Matching

Learners examine the impedance matching capability of a transformer and how to select the proper turns ratio to achieve this function. A brief quiz completes the activity.

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.

Inductive Reactance

Students read an introduction to inductive reactance and view examples.

Volts Per Hertz Ratio

In this animated and interactive object, learners examine why the voltage produced by an AC drive must be increased when its frequency is increased due to inductive reactance.

The RC Time Constant

Learners examine the concept of the RC time constant. The instantaneous voltage across the capacitor is calculated.

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.

Logic State Signals

In this learning activity you'll identify the voltage levels produced or recognized by digital logic devices as valid or invalid logic state signals.

Serial-In Serial-Out Shift Register

In this animated activity, students view the operation of a 4-bit serial-in serial-out register. A brief quiz completes the learning object.

NOR Gates

In this learning activity you'll review the operation of a NOR gate by using a truth table, a Boolean Algebra equation, a switch analogy, and a written statement.

Transistor Fundamentals: Decibel Gain, Power, and Voltage

Students read about decibel power gain and decibel voltage gain. Examples are given for each.

Electronic Workbench Basics: Opening a File for Simulation

Students read an introduction to the electronic workbench and view a demonstration of how to open a file for circuit simulation.

The Zener Diode

Students read about the operation of the zener diode. This activity includes the ideal zener, the breakdown operation, the calculation of series, and zener and load current.

Thermistor Temperature Alarm Circuits

In this animated object, learners examine the operation of a temperature alarm circuit that uses a thermistor in a Wheatstone Bridge.

The Duty Cycle of a Multivibrator

In this interactive and animated object, learners examine the duty cycle of a squarewave produced by a multivibrator using a 555 IC (integrated circuit). A brief quiz completes the activity.

The Horizontal Portion of the Sine Wave

In this animated object, learners examine cycles, frequency, Hertz, wavelengths, and periods. A brief quiz completes the activity.

Electrical Opens and Shorts

By Terry Bartelt, David Schwid

In this animated activity, learners examine the difference between opens and shorts in an electrical circuit. A brief quiz completes the object.

How Adding Parallel Branches Decreases Total Resistance

In this animated object, learners follow an analogy of water flowing through pipes and valves to see how resistance decreases in a parallel circuit as branches are added.

Kirchhoff's Current Law: Practice Problems

Learners review Kirchhoff's Current Law and work six practice problems. Feedback is given.