Integrated Circuits Used 74LS11 Procedure Add IC 74LS11 into ICBase-4 (74LS11).Connect Pin-1 (Input) of ICBase-4 (74LS11) to Input-1.Connect Pin-2 (Input) of ICBase-4 (74LS11) to Input-2.Connect Pin-3 (Input) of ICBase-4 (74LS11) to Input-3.