Mekanism: Getting Started with Machines and Materials
Mekanism is a large tech mod for processing resources and generating power, and it begins with a few core materials. This guide covers the foundation you build before the advanced machinery.
Core materials
Mekanism adds its own metals — Osmium, Tin, Lead, Uranium and Steel — smelted or blasted from their dusts and ores. 
Infused Alloy is the first crafting alloy and appears in almost every early recipe, upgrading later into 
Reinforced Alloy and 
Atomic Alloy.
Control circuits and energy
Two building blocks recur everywhere:
Basic Control Circuit is the base component; combine it with Infused Alloy to make an 
Advanced Control Circuit, then Elite and Ultimate circuits with better alloys.- The
Energy Tablet (redstone, gold and Infused Alloy) stores power and feeds into energy cubes and cells.
Machine tiers
Mekanism machines come in tiers — Basic, Advanced, Elite and Ultimate — and you upgrade them in place with Tier Installers. A 
Basic Tier Installer is made from redstone, Basic Control Circuits, iron and Oak Planks. Start with basic machines and installers, then climb the tiers as you produce better circuits and alloys. From here, see the machine-tiers, energy and gear guides for each system in depth.
Covers the mod's in-game guide topics: