The Bridge Rectifier
By Terry Bartelt
Learners see how a bridge rectifier converts an AC voltage into a pulsating DC voltage. A brief quiz completes the activity.
Op Amp Comparator (Screencast)
Students read an explanation of the operation of an operational amplifier that functions as a comparator.
Voltage Measurements of a Half-Wave Rectifier
In this animated lesson, students view how an oscilloscope and a DC voltmeter measure the voltage of a half-wave rectifier.
Silicon Diode Basics
By Patrick Hoppe
This primer introduces the student to the key terms and concepts associated with the silicon diode.
The Basic Operation of a Diode
In this interactive and animated object, learners examine the operation of a semiconductor diode when it is forward and reverse biased. A brief quiz completes the activity.
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.
Transistor Fundamentals: Classes of Operation
Students read about the three main classes of amplifiers and view graphical representations of the collector current and circuit.
Transistor Fundamentals: Review of Logarithms
Students review logarithms as they pertain to electronics.
Transistor Fundamentals: AC Coupling Capacitors
Students view the design and function of an ac model for a transistor circuit.
Transistor Fundamentals: AC Model Equations
Students view the equations used to determine the ac parameters of the transistor circuit.
Full-Wave Rectifier
Students examine the full-wave rectifier. They review appropriate formulas and examples of actual circuits.
Transistor AC Analysis Practice Problem: Circuit #4
The learner solves for Zin(base), Zin(stage), Zout, and Av. A "help" screen is available.
Transistor Fundamentals: Junction Field Effect Transistor (JFET)
Students read about the common characteristics of the Junction Field Effect Transistor. They also explore the schematic symbols and the basic operation of the JFET.
Transistor Fundamentals: The MOSFET
Students read an introduction to the Metal Oxide Semiconductor Field Effect Transistor. They also examine its enhancement mode.
Rectifier Filtering
In this animated object, students observe how the pulsating DC output voltage of a full-wave rectifier is filtered by a capacitor.
The Op Amp Integrator
By Terry Fleischman
The learner will understand the circuit configuration and operation of an integrator op amp.
Light-Emitting Diodes (LED)
Students read about light-emitting diodes, including LED voltage and current, and how to protect against reverse voltage.
LED Flashing Circuit
In this animated and interactive object, learners study how a DC circuit, consisting of a diac, a capacitor, and two resistors, causes a light-emitting diode to turn on and off. A brief quiz completes the activity.
Diode Approximations (Screencast)
This learning object introduces the three approximations of a diode.
Transistor DC Analysis Practice Problems: Circuit #2
Learners analyze a base-biased npn transistor circuit. A "help" screen is available.
The Triac
Learners study the fundamental operation of a triac, particularly how it is turned on and off. A brief quiz completes the activity.
Transistor Fundamentals: Frequency Response Vocabulary
Students read the vocabulary associated with frequency response as it relates to an amplifier.
Half-Wave Rectifier
This primer introduces the student to the half-wave rectifier. Both the 1st and 2nd approximations are examined.
Transistor AC Analysis Practice Problems: Circuit #1
Transistor DC Analysis Practice Problems: Circuit #5
Learners analyze an emitter-biased npn transistor circuit. A "help" screen is available.