Two gentlemen from Raytheon recently spoke to DTech survey about all of the cool things they do as electrical engineers. One of their main projects is the development of infrared cameras in the battlefield and attached to satellites.
The students were so stoked to see the heat sensing cameras. Tom and Greg hooked the camera up to the projectors and the students got to see how the military technology is used. One of the coolest aspects of the presentation was when one of the students walked along the floor and the camera was pointed at his footsteps. The friction from his shoes caused the temperature to go up where he stepped. The camera picked up the temperature difference and could, as Greg put it, look back in time. You can imagine how useful this might be for tracking people.
Greg and Tom encouraged the students to continue working with Arduino because it helps them understand the principles of electronics.