Integrated Circuits Used 74LS32 74LS04 Procedure Add IC 74LS32 into ICBase-1 (74LS32).Add IC 74LS04 into ICBase-2 (74LS04).Connect Input-1 to Pin-1 (Input) of ICBase-2 (74LS04).Connect Pin-2 (Output) of ICBase-2 (74LS04) to Pin-1 (Input) of ICBase-1 (74LS32).