Integrated Circuits Used 74LS02 Procedure Add IC 74LS02 into ICBase-2 (74LS02).Connect GND Port to Pin-7 (Ground) of ICBase-2 (74LS02).Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS02).Connect Output-0 to Pin-1 (Output) of ICBase-2 (74LS02).