Integrated Circuits Used 74LS04 74LS08 Procedure Add IC 74LS04 into ICBase-2 (74LS04).Connect Pin-7 (Ground) of ICBase-2 (74LS04) to GND Port.Add IC 74LS08 into ICBase-1 (74LS08).Connect Pin-1 (Input) of ICBase-2 (74LS04) to Input-5.