Integrated Circuits Used 74LS32 74LS02 74LS08 74LS138 Procedure Add IC 74LS32 into ICBase-1 (74LS32).Add IC 74LS02 into ICBase-2 (74LS02).Add IC 74LS08 into ICBase-3 (74LS08).Add IC 74LS08 into ICBase-4 (74LS08).Add IC 74LS138 into ICBase-5 (74LS138).