Integrated Circuits Used 74LS08 74LS04 74LS32 Procedure Add IC 74LS08 into ICBase-1 (74LS08).Add IC 74LS04 into ICBase-2 (74LS04).Connect Pin-6 (Output) of ICBase-3 (74LS32) to Pin-8 (Input & Output) of ICBase-2 (74LS04).Add IC 74LS32 into ICBase-3 (74LS32).