Integrated Circuits Used 74LS03 Procedure Add IC 74LS03 into ICBase-1 (74LS03).Add IC 74LS03 into ICBase-2 (74LS03).Add IC 74LS03 into ICBase-3 (74LS03).Add IC 74LS03 into ICBase-4 (74LS03).Add IC 74LS03 into ICBase-5 (74LS03).