Integrated Circuits Used 74LS138 74LS04 Procedure Add IC 74LS138 into ICBase-1 (74LS138).Connect Pin-10 (Input & Output) of ICBase-2 (74LS04) to Pin-5 (Input) of ICBase-1 (74LS138).Add IC 74LS04 into ICBase-2 (74LS04).
