Alex's Electronics is a mod that slightly increases circuit production. It adds 3 new items that are exclusively used in circuits, and can only be crafted in assembling machines. Electronic circuits aren't unlocked from the start, and requires you to research electronics, which also unlocks basic electronic parts. Advanced and Processor parts require fluids, petroleum gas and sulfuric acid respectively. This mod is for you if you want a slightly more complicated game, but nothing too game-changing.
This mod is part of a larger mod set I'm working on.