Integrated Circuits Used 74LS02 74LS08 Procedure Add IC 74LS02 into ICBase-3 (74LS02).Connect Pin-5 (Input) of ICBase-1 (74LS08) to Input-15.Connect Pin-7 (Ground) of ICBase-1 (74LS08) to Output-15.Add IC 74LS08 into ICBase-1 (74LS08).