Integrated Circuits Used 74LS04 74LS08 74LS32 Procedure Add IC 74LS04 into ICBase-2 (74LS04).Add IC 74LS08 into ICBase-3 (74LS08).Add IC 74LS32 into ICBase-4 (74LS32).Connect Pin-3 (Output) of ICBase-4 (74LS32) to Pin-19 (Input) of ICBase-3 (74LS08).