Integrated Circuits Used 74LS04 74LS86 Procedure Add IC 74LS04 into ICBase-1 (74LS04).Add IC 74LS86 into ICBase-2 (74LS86).Connect Pin-1 (Input) of ICBase-1 (74LS04) to Input-14.Connect Output-0 to Pin-2 (Output) of ICBase-1 (74LS04).