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