Cyclops camera
An experimental digital camera captures images with a single pixel. Even the cheapest of mass-produced digital cameras have millions of pixels. The trick is that the light bounces off a chip containing nearly 800,000 movable microscopic mirrors. A series of 10,000 exposures with different, random arrangements of the mirrors gives a computer enough information to construct an image. The advantage is simpler hardware and much lower power use. A Physics News Update story has more details.