A modification to MineCraft that enables a physical light to be turned on or off has been created.
The author uses OpenComputers, a mod which allows configurable, components to be defined that will make up a ‘computer’ within MineCraft. Download OpenComputers here.
By reverse-engineering a WIFI-controlled light, the author was able to send a signal to turn on and off a light from within MineCraft.
Here’s an animated gif showing the mod:
The full article “Breaking the 4th Wall with Minecraft” can be read here.