Integrated Circuits Used 74LS151 Procedure Add IC 74LS151 into ICBase-1 (74LS151).Connect Pin-6 (Output) of ICBase-1 (74LS151) to Output-15.Connect Input-15 to Pin-7 (Input) of ICBase-1 (74LS151).Connect GND Port to Pin-8 (Ground) of ICBase-1 (74LS151).