The Semiconductor Diode
By Terry Bartelt
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.
Ohm's Law: Current
By Tim Tewalt, Patrick Hoppe
Learners study animated rheostat settings that show how current flow is inversely proportional to resistance. Ten review questions complete the learning object.
Powers of Ten: The Proper Use of Symbols
By Patrick Hoppe
Students read about the six common terms used to represent the powers of ten in the field of electronics and complete two matching exercises.
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.
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.
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.
Maximum Power Transfer
Learners are introduced to the maximum power transfer theorem. Examples show the load as it varies and the results are graphed.
The Spring-and-Diaphragm Actuator
Learners study an animation of a spring-and diaphragm actuator controlling the opening of a flow valve.
Comparing Hydraulics and Pneumatics
Learners examine the differences and similarities between hydraulic and pneumatic systems.
In this animated object, learners study how the internal parts of an AC synchronous motor interact with magnetic fields to cause rotation. A short quiz completes the activity.
The 555 Astable Multivibrator
Learners observe the animated operation of an astable mulivibrator using a 555 IC (integrated circuit) chip and external components.
How to Read a Caliper
By Barbara Anderegg
In this interactive object, learners review how to read a caliper. They then test their skills with eight practice questions.
The Zener Diode: Practice Problems
Students complete 10 practice problems. These deal with the determination of series current, zener current, and load current, and if the zener diode is operating in the breakdown region.
The Welder's Tool Bag
In this learning object, you’ll explore what tools should be a part of every welding tool bag.
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.
A Sample DC/AC I Exam
Students complete a sample exam for DC/AC I. It provides an overview of the material presented in the course.
Calculating Lengths for Tube Bending
By Dave Hoffman
The learner reads an explanation of how to determine lengths for tubing and pipe bending and then performs calculations in an interactive exercise. Two methods for determining angle bends are shown. A calculator is required.
The Hydraulic Color Code
Learners read an explanation of the color code used on schematic diagrams for hydraulic circuits. Circuit examples for each color are shown.
Noninverting Op Amp
In this animated object, learners examine the fundamental operation of a noninverting operational amplifier. A brief quiz completes the activity.
Learners read an explanation of the concept of apparent power in a power distribution system involving motors, generators, and transformers. A quiz completes this interactive lesson.
Learners are introduced to primary and secondary batteries. Examples are given.
In this animated object, learners examine how various types of positive and non-positive displacement hydraulic pumps work.
Studies show that more than 75 percent of all hydraulic system failures are a direct result of unclean oil. In this interactive object, learners examine the three primary types of hydraulic system filters. A brief quiz completes the activity.
Sizing Motor Overloads
By Terry Bartelt, Pat Jensen
Learners use the National Electrical Code to determine the size of a motor overload protection device.
DC Compound Motors
Learners study animation showing the operation of cumulative and differential DC compound motors. A short quiz completes the activity.