[youtube=http://www.youtube.com/watch?v=KzrFzkb3A4o]
Building various sorts of computers — arithmetic logic units, or ALUs — out of Minecraft‘s blocks has been done repeatedly, but this one includes animated, sound-enhanced, color-coded parts to help you visualize the calculations in action. Specs: 256 bytes of ROM, 32 bytes of RAM and a 250 millihertz clock.