Integrated Circuits Used 74LS04 74LS11 Procedure Add IC 74LS04 into ICBase-1 (74LS04).Add IC 74LS11 into ICBase-2 (74LS11).Add IC 74LS11 into ICBase-3 (74LS11).Add IC 74LS11 into ICBase-4 (74LS11).Connect GND Port to Pin-7 (Ground) of ICBase-1 (74LS04).