An addition to a classic word alarm clock: A touch front cover. It's made of a PCB, with some electronics on the back to recognize the touch at each word. So you're able to control the clock by just touching it. You can set the time, alarm time and many other things.
On the backside there are two MPR121 for 24 different areas, which can be recognized. Since they run only at 3.3V some more parts were needed. The communication with the clock runs over I²C.