Integrated Circuits Used 74LS32 Procedure Connect Input-15 to Pin-1 (Input) of ICBase-1 (74LS32).Add IC 74LS32 into ICBase-1 (74LS32).Connect Input-14 to Pin-2 (Input) of ICBase-1 (74LS32).Connect Output-15 to Pin-3 (Output) of ICBase-1 (74LS32).