Integrated Circuits Used 74LS00 Procedure Add IC 74LS00 into ICBase-1 (74LS00).Connect GND Port to Pin-7 (Ground) of ICBase-1 (74LS00).Connect Output-15 to Pin-20 (VCC) of ICBase-1 (74LS00).Connect GND Port to ICBase-1 (74LS00).