Integrated Circuits Used 74LS151 74LS86 Procedure Add IC 74LS151 into ICBase-3 (74LS151).Add IC 74LS86 into ICBase-4 (74LS86).Connect GND Port to Pin-8 (Ground) of ICBase-3 (74LS151).Connect VCC Port to Pin-16 (Input) of ICBase-3 (74LS151).