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