Different electro-mechanical elements would be introduced and demonstrated. The optimal application for these elements should also be discussed so students know when to use what in their own projects. Do I used a DC or stepper motor for a situation where exact rotation is necessary...a pnuematic piston or linear actuator when i'm lifting something heavy?
I think the circuits necessary to drive these elements would also be interesting. How to use relays, transistors, diodes and so on.