Integrated Circuits Used 74LS86 74LS08 74LS32 Procedure Add IC 74LS86 into ICBase-1 (74LS86).Connect Pin-5 (Input) of ICBase-2 (74LS08) to Pin-8 (Input & Output) of ICBase-1 (74LS86).Add IC 74LS08 into ICBase-2 (74LS08).Add IC 74LS32 into ICBase-3 (74LS32).