In this animated lesson, students view the operation of an electromechanical relay. A brief quiz concludes the activity.

In this animated lesson, students view the operation of an electromechanical relay. A brief quiz concludes the activity.

This animated lesson shows the operation of timer-on and timer-off delay relays used in ladder circuit operate.

In this animated object, learners examine how to use a programmable logic controller as an alternative to hardwiring a ladder logic circuit.