A Sample DC/AC I Exam
By Patrick Hoppe
Students complete a sample exam for DC/AC I. It provides an overview of the material presented in the course.
By Terry Bartelt
The schematic symbols of logic gates used in digital circuits are shown.
Clock Pulse Triggering of Flip-Flops
This learning object shows the symbols used to represent the type of pulse required at the clock input to activate flip-flops.
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.
Oscilloscope AC Voltage Measurements
In this animated learning object, students view the operation of an oscilloscope that is used to measure AC voltages. A brief quiz completes the activity.
In this animated activity, learners examine how an electronic converter changes digital signals to analog signals. Sections of a synthesizer are identified, and the operation of a D/A converter is demonstrated.
Conductors, Insulators and Resistors
In this animated activity, learners examine why various materials are conductors, insulators, or resistors of current. A short quiz completes the learning object.
Shorts Affecting Current in a Series Circuit
In this learning activity you'll review how a short affects current flow and voltage in a series circuit.
In this animated lesson, students view the operation of an electromechanical relay. A brief quiz concludes the activity.
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.
Learners are introduced to primary and secondary batteries. Examples are given.
Building a Binary Counter with a JK Flip-Flop
In this animated activity, learners examine the construction of a binary counter using a JK flip-flop. The ability of the JK flip-flop to "toggle" Q is also viewed.
Op Amp Fundamentals: The Operational Amplifier
Students read about the characteristics of the ideal operational amplifier and compare them with the industry standard LM741C.
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.
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.
The Vertical Portion of the Sine Wave
In this animated lesson, learners examine sine waves and alternating current. A brief quiz completes the object.
Opens and Shorts
In this animated activity, students examine the difference between opens and shorts in an electrical circuit. A brief quiz completes the object.
Current Divider Rule Practice Problems
In this interactive object, learners review the CDR and work nine problems. Immediate feedback is given.
In this animated object, learners examine three different types of multivibrators: astable, monostable, and bistable. A brief quiz completes the activity.
The 7493 IC Binary Counter
In this interactive and animated object, 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. A quiz completes the activity.
Inverting Op Amp
In this interactive object, learners examine the operation of an inverting operational amplifier through formulas, tables, and animated illustrations. A brief quiz completes the activity.
Transistor DC Analysis Practice Problems: Circuit #1
Learners analyze a base-biased npn transistor circuit. A "help" screen is available.
An Impedance Matching Application
Learners consider why an impedance matching transformer is needed to connect an antenna to a television.
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.
In this animated activity, learners see that changing the resistance value of the load in the secondary of a transformer causes current to vary in the primary.