Integrated Circuits Used 74LS00 Procedure Connect Pin-8 (Input & Output) of ICBase-1 (74LS00) to Pin-15 (Input) of ICBase-1 (74LS00).Connect Pin-14 (Output) of ICBase-1 (74LS00) to Pin-7 (Ground) of ICBase-1 (74LS00).Add IC 74LS00 into ICBase-1 (74LS00).