Integrated Circuits Used 74LS00 Procedure Connect VCC Port to Pin-20 (VCC) of ICBase-3 (74LS00).Connect GND Port to Pin-7 (Ground) of ICBase-3 (74LS00).Connect Input-1 to Pin-1 (Input) of ICBase-3 (74LS00).Add IC 74LS00 into ICBase-3 (74LS00).