By Terry Bartelt
Learners study the fundamental operation of a triac, particularly how it is turned on and off. A brief quiz completes the activity.
Calculating DC Values of a Transistor Amplifier
In this animated activity, learners view the seven steps that are used to calculate voltage and current values throughout a common-emitter transistor amplifier.
Active Region Operation of a Transistor
Learners view the operation of an NPN transistor in the active region.
The Time Proportioning Operational Amplifier (Screencast)
In this animated object, learners see how a time proportioning operational amplifier varies an average DC voltage. A brief quiz completes the activity.
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.
The Zener Diode: Practice Problems
By Patrick Hoppe
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.
Transistor Fundamentals: Voltage-Divider Biased NPN Transistor
Students view drawings of the dc analysis of a voltage-divider biased NPN transistor.
Transistor Fundamentals: AC Models
Students read about the four steps to creating an ac model and view examples.
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.
Waveforms of a Triac Circuit
Learners observe the waveforms in a circuit in which a triac controls the brightness of a lamp’s light. A brief quiz completes the activity.
Waveforms of an SCR Circuit
Learners view waveforms at various locations of an SCR circuit controlling the intensity a light bulb. The waveforms are shown when the light is dim, at medium brightness, and at full brightness. A brief quiz completes the activity.
Average Voltages of Pulsating DC Voltages
In this learning activity, learners will learn to calculate the average voltage produced by half-wave and full-wave rectifiers.
Transistor Fundamentals: Collector Saturation and Collector-Emitter Cutoff
Students read about the concepts of saturation and cutoff. They view diagrams that illustrate the interaction of the load line and the family of curves.
The Transistor Symbol
In this animated and interactive object, learners use a memory device to identify NPN and PNP transistors. Learners also examine how much the transistors turn on when the voltage applied to the base is varied.
Operation of Full-Wave Bridge Rectifier
By Matthew Treu
In this learning activity you'll explore the operation of a full-wave bridge rectifier circuit.
Op Amp Fundamentals: The Operational Amplifier
Students read about the characteristics of the ideal operational amplifier and compare them with the industry standard LM741C.
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.
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 Ideal Bode Plot
The Ideal Bode plot is introduced. The three main topics covered are: corner frequencies, midband voltage gain, and the roll-off rate.
The Differentiator Op Amp
In this animated object, learners examine the circuit configuration and operation of a differentiator operational amplifier. A brief quiz completes the activity.
The Transistor Switch
The learner views the operation of a transistor switching from saturation to cutoff. A brief quiz completes the activity.
Zener Diode Voltage Regulation
In this animated and interactive object, learners examine how changes in applied voltage affect the current and voltages in a zener diode voltage regulation circuit. A short assessment completes the activity.
Transistor Fundamentals: Emitter-Biased NPN Transistor
Students view a dc analysis of an emitter-biased NPN transistor.
Transistor Fundamentals: Decibel Gain, Power, and Voltage
Students read about decibel power gain and decibel voltage gain. Examples are given for each.
Transistor Fundamentals: AC Bypass Capacitors
Students view drawings of the emitter resistor bypass capacitor.