Students read an explanation of the operation of an operational amplifier that functions as a comparator.

Students review the functions of the keys on the Starrett HB400 Optical Comparator controller.

Students read how to set up the optical comparator edge detector in this interactive learning object.

The learner tests his/her ability to set up the optical comparator edge detector using a virtual simulation of the machine.

Learners read an explanation of how to connect two 7485 ICs to compare binary numbers by creating an 8-bit comparator. Diagrams and charts are presented.

Learners view the operation of the 7485 integrated circuit magnitude comparator in this animated object. A quiz completes the activity.

In this interactive learning object, learners read how to compensate for a part not mounted perfectly parallel to the machine axis.

Students read about the basics of using an indicator.