This is one individual littleBits bit: The light trigger is one of the more intelligent bits. It senses how much light is around it, and if the light is above a certain point, it turns on the bits that come after it. Perfect for a night light! What’s littleBits? littleBits is a system of electronic modules that snap together with tiny magnets for prototyping and play.

Check out the detailed electrical diagrams on GitHub.