Circuits are one of the most daunting and overwhelming pieces of Factorio. It's easy to ignore them or try to build a factory without using them, but ...

The latest stable release for the mega-factory monstrosity adds map tools, a new tutorial, a host of performance and balance changes, and an undo button.

Using complicated Circuit network logic to use the railway as an anything-to-anything bus in Factorio - saxbophone/factorio-train-balancer ...

During your Factorio playthrough, your factory will get larger and larger. You'll eventually need to transport fuel and materials over longer distances ...