Integrated Circuits Used 74LS00 Procedure Add IC 74LS00 into ICBase-3 (74LS00).Connect Pin-7 (Ground) of ICBase-3 (74LS00) to GND Port.Connect Pin-20 (VCC) of ICBase-3 (74LS00) to VCC Port.Connect Pin-3 (Output) of ICBase-3 (74LS00) to Output-2.