Integrated Circuits Used 74LS05 Procedure Add IC 74LS05 into ICBase-2 (74LS05).Connect Input-7 to Pin-1 (Input) of ICBase-2 (74LS05).Connect Output-4 to Pin-2 (Output) of ICBase-2 (74LS05).Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS05).