Excel: Rectangular to Polar Conversion for Magnitude

By Patrick Hoppe

Learners read how to convert complex numbers to their polar equivalent in Excel.

Ladder Circuit Labeling

By Terry Bartelt

Learners examine the labeling scheme used in ladder logic diagrams to identify components, wires, rungs, and rails. This activity includes self-check questions.

The PLC Examine-On Instruction

Learners examine an animated view of the operation and programming requirements of a PLC Examine-On instruction. A brief quiz completes the activity.

SLC-500 Data File Elements

Learners examine the elements of a data file memory of an Allen-Bradley SLC-500 programmable controller. A quiz completes the activity.

Apparent Power

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.

Bandwidth Capacity Techniques

By Dennis Fontaine, Terry Bartelt

In this learning activity you'll follow the process of converting digital data into a series of analog signals.

Wheatstone Bridge

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

Oscilloscope: DC Voltage Measurements

Learners follow step-by-step instructions for using an oscilloscope to measure DC voltages.

Transformers

Students read an introduction to transformers that includes schematic symbols, turns ratios, mutual inductance, and the coefficient of coupling.

Reading a P&ID Loop

Learners follow steps for reading a P&ID diagram of a closed-loop circuit.

Sectional Views

By Glenn Sokolowski

In this interactive object, learners examine sectional views used in engineering drawings. The sections shown are full, half, offset, aligned, revolved, and broken-out. Learners match drawings of sectional views with the names of the views.

Excel: Locking Cell References

Students read how to lock a cell that is being referenced in a formula so that it does not automatically show an increment when the formula is copied.

Designing a Cylinder Dwell Circuit

This animated lesson shows how a ladder circuit uses timer-on delays to cause an extrusion machine to operate.

Sizing Motor Overloads

By Terry Bartelt, Pat Jensen

Learners use the National Electrical Code to determine the size of a motor overload protection device.

Selector Switch Labeling

In this animated object, learners examine the method of interpreting the truth tables for two-position and three-position selector switches on ladder logic circuit diagrams.

The Current Limiting Circuit

Learners examine the circuitry in a DC variable speed drive that protects the rectifier diodes and motor windings from being damaged due to excessive current.

Up/Down-Counter Application

In this animated object, learners examine how PLC up/down-counters are used to control an automated parking lot gate.

Cascading Timers

Learners study the method of cascading two or more PLC timers to extend their time capacity.

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.

The Generation of Alternating Current

This learning object describes the production of an alternating current in a generator with a single-loop armature. An illustration of how a sine wave is produced is shown through animation.

Air-to-Open/Air-to-Close Valves

Learners examine how air-to-open valves and air-to-close valves are used in different situations. A brief quiz completes the activity.

Excel: Determining the Square Root of a Complex Number

Learners view the steps for determining the square root of a complex number in Excel.

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.

Waveforms of a Triac Circuit

Learners observe the waveforms in a circuit in which a triac controls the brightness of a lampâ€™s light. A brief quiz completes the activity.