Integrated Circuits Used 74LS11 74LS02 Procedure Add IC 74LS11 into ICBase-2 (74LS11).Add IC 74LS02 into ICBase-3 (74LS02).Connect VCC Port to Pin-20 (VCC) of ICBase-3 (74LS02).Connect Pin-1 (Output) of ICBase-3 (74LS02) to Pin-19 (Input) of ICBase-2 (74LS11).