Integrated Circuits Used 74LS86 74LS02 74LS08 Procedure Add IC 74LS86 into ICBase-2 (74LS86).Add IC 74LS02 into ICBase-3 (74LS02).Add IC 74LS08 into ICBase-4 (74LS08).Connect Pin-1 (Output) of ICBase-3 (74LS02) to Pin-1 (Input) of ICBase-2 (74LS86).