Integrated Circuits Used 74LS02 74LS32 Procedure Add IC 74LS02 into ICBase-2 (74LS02).Add IC 74LS02 into ICBase-3 (74LS02).Add IC 74LS32 into ICBase-4 (74LS32).Connect Input-10 to Pin-2 (Input) of ICBase-2 (74LS02).