Advanced Circuit is the upper-tier IC2 crafting component required for MFE, MFSU, Mass Fabricator and Quantum armor.
Guide
Craft one Electronic Circuit from 6 Copper Cables and 2 Redstone around 1 Iron Plate, the standard IC2 Exp recipe.
Mine Glowstone blocks in the Nether or trade emeralds with a Cleric villager; each block drops 2-4 dust.
Mine redstone ore with an iron or higher pickaxe; one ore drops 4-5 dust, so two pieces are easy to spare.
Place glowstone in the four corners and top/bottom centre, Electronic Circuit in the middle, redstone left and right of it.
Advanced Circuit stacks to 64 and is consumed in many late-game IC2 recipes, so keep at least one stack on hand.
Use a Macerator on Glowstone blocks to double dust output; one block becomes 4 dust instead of 2-4.
Advanced Circuit uses 1 Electronic Circuit in the centre, 2 Redstone on its left and right, and 6 Glowstone Dust filling the corners and top/bottom centre.
Advanced Circuit is an item, not a placeable block. It only exists in inventories and recipes and stacks to 64.
MFE Unit, MFSU, Induction Furnace, Mass Fabricator, Replicator, advanced solar arrays, extra Nuclear Reactor chambers and every Quantum armor piece.
This is IndustrialCraft 2 Experimental; the recipe and uses described here are from that build.
In vanilla IC2 Exp there is no loot or trade source. You must craft it from one Electronic Circuit, two redstone and six glowstone dust.