Integrated Circuits Used 74LS151 Procedure Add IC 74LS151 into ICBase-3 (74LS151).Connect VCC Port to Pin-16 (Input) of ICBase-3 (74LS151).Connect Pin-8 (Ground) of ICBase-3 (74LS151) to GND Port.Connect Pin-7 (Input) of ICBase-3 (74LS151) to GND Port.