Internal Elements of a 555 Timer (Screencast)

By Terry Bartelt

In this screencast, learners examine the internal elements of a 555 IC and their operation.

The 7493 IC Binary Counter (Screencast)

In this screencast, learners examine the construction of a 7493 IC as mod-2 and mod-8 up-counters. They view how this binary counter can be modified to operate at different modulus counts.

Voltage Sources in Parallel

The effect of connecting voltage sources in parallel to increase amperage to a load is presented.

Resistor Color Code Description

By Patrick Hoppe

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.

Parallel Circuit Analysis Practice Problems Part 1

In this interactive object, students work parallel circuit analysis problems. They solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.

Parallel Circuit Analysis Practice Problems: Circuit #4

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.

Parallel Circuit Analysis Practice Problems: Circuit #3

Parallel Circuit Analysis Practice Problems Part 2

In this interactive object, students work 11 practice problems and solve for total resistance and current, the current through each resistor, the voltage across each resistor, and the power dissipated.

Interpreting the Resistor Color Code

Students examine how to interpret resistor color code bands to determine resistance values and tolerance ranges. This interactive learning object has audio content and includes exercises.

Total Resistance of a Series Circuit

In this learning activity you'll review the process of solving for the total resistance in a series DC circuit.

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.

Total Resistance in a DC Parallel Circuit

In this learning activity you'll determine the total resistance in a DC parallel circuit.

Inductive Reactance Demonstration 1

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

Wheatstone Bridge

Students follow step-by-step directions on how to make mathematical calculations for a Wheatstone bridge.

Methods of Producing Electricity

In this learning activity you'll review the six different ways in which electricity is produced: chemical, friction, heat, light, magnetism, and pressure.

Abbreviations Representing Electrical Quantities

In this learning activity you'll identify abbreviations that represent quantities associated with electrical circuits.

How Current Requires Voltage

This learning activity uses a water pressure analogy to present the concept that voltage pressure is required to cause current flow.

Electrical Switches & Pushbuttons

In this learning activity you'll review the operation and schematic symbols of various types of switches and push buttons used for electronic circuits.

Capacitors Series - Parallel: Practice Problems

Students complete 10 practice problems.

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.

Series-Parallel Circuit Analysis: Practice Problems Circuit 1

In this interactive object, learners analyze a series-parallel DC circuit problem in a series of steps. Immediate feedback is provided.

The Magnetic Circuit

Learners compare electromagnetic quantities with the voltage, current, and resistance quantities of an electrical circuit. A brief quiz completes the object.

Voltage Sources in Series

In this learning activity you'll explore the effect of connecting voltage sources in series to increase voltage applied to a load.

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.