The operation and characteristics of an absolute optical encoder used in automation applications are presented.

In this animated object, learners examine the hysteresis function of a sensor.

This animated lesson shows how a pressure switch connected in a ladder circuit causes the cylinder of a hydraulic circuit to extend and retract.

Learners view a vector diagram for a series RL circuit. Information on the voltage across each component, the total voltage, and the phase angle is included.

Learners work problems to make conversions between RMS, average, peak, and peak-to-peak AC voltages.

Learners examine how the load resistance connected to the secondary coil of a transformer affects the primary current. A brief quiz completes the activity.

Learners view animations and video clips showing how power is transmitted from one energized coil to another.

Students solve practice problems on voltage, current, and impedance matching. Examples precede the problems.

A sample exam for DC/AC I, unit # 12 is presented to the students. This unit covers transformers.

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