Then, ask the students to think of one thing they want to talk about. Let them bring the items into the classroom with lab time to take them apart, guided by the instructor, and other students. They can choose junk in their basement or garage, or buy something cheap from a second-hand store. Or even from the local recycling center. Need basic tools, multimeters (inexpensive from Harbor Freight -- good enough for this class), etc Provide some basic instructions on safety and tool usage.
They might even figure out how to fix something.
Then, for the rest of the couse, each student does their presentation. (They also "accidentally" learn some presentation skills.)
The best way to learn is to teach!
Years ago, I participated in a "How Things Work" seminar at MIT just like this. Great stuff!
This fall, San Francisco will test 6,000 of its 24,000 metered parking spaces in the nation's most ambitious trial of a wireless sensor network that will announce which of the spaces are free at any moment. Drivers will be alerted to empty parking places either by displays on street signs, or by looking at maps on screens of their smartphones. They may even be able to pay for parking by cellphone, and add to the parking meter from their phones without returning to the car.
Any guesses on the when this will be hacked?
Like, "reserving" an empty spot by convincing a sensor that a car is actually parked there.
Of course, in San Francisco, this will be for naught, since spaces don't stay empty for any longer.
Or, perhaps using the wireless mesh network for some other purpose?
"If it ain't broke, don't fix it." - Bert Lantz