You may have heard that Minecraft, with its various Redstone-based constructs, is Turing-complete — meaning that it can, in theory, emulate any digital computer. (The size of the Minecraft world, in fact, would make quite a few interesting designs possible.)
It’s another thing entirely, however, to see this put into practice. By combining hundreds (thousands?) of building blocks such as BCD adders and subtracters, “MaxSGB” has created an in-world Minecraft scientific/graphing calculator. Because Minecraft’s discrete 1m x 1m x 1m block system doesn’t lend itself very well to miniaturization, the resulting construct is immense — taking up millions of cubic meters of space. It gets the job done, though — just check out the video!
I’m still waiting for the ultimate Minecraft emulator, though — a computer capable of running Minecraft, inside Minecraft.