Integrated Circuits Used 74LS00 Procedure Connect Pin-1 (Input) of ICBase-1 (74LS00) to Input-14.Connect Pin-2 (Input) of ICBase-1 (74LS00) to Input-13.Add IC 74LS00 into ICBase-1 (74LS00).Connect Pin-7 (Ground) of ICBase-1 (74LS00) to Input-12.