Integrated Circuits Used 74LS04 Procedure Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS04).Connect GND Port to Pin-7 (Ground) of ICBase-1 (74LS04).Connect Input-15 to Pin-1 (Input) of ICBase-1 (74LS04).Add IC 74LS04 into ICBase-1 (74LS04).