Learners study the theory of operation for a ratio pyrometer that measures temperature. A short quiz completes the activity.

Students examine the first and second approximations of a voltage source. A "stiff" voltage source is defined, and several examples are given.

In this animated activity, learners examine the operation of a pneumatic cylinder that continuously cycles by extending and retracting.

In this learning activity you'll review the various ways to calculate the total power consumed in a series circuit.

In this animated activity, learners examine the operation of the SCR, including how it is biased and how it is turned off. A brief quiz completes the object.

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.

In this animated activity, learners examine the circuitry in a DC variable speed drive that causes the motor to accelerate or decelerate at slow rates. This learning object has audio content.

Learners examine the speed control circuits in a DC variable speed drive that cause the RPM of a motor to vary. This activity has audio content.

In this animated activity, learners examine the firing circuits in a DC variable speed drive. The circuits cause the current flow through the armature and rpm to vary. This activity has audio content.