Integrated Circuits Used 74LS83 74LS86 Procedure Add IC 74LS83 into ICBase-3 (74LS83).Add IC 74LS86 into ICBase-4 (74LS86).Connect VCC Port to Pin-5 (VCC) of ICBase-3 (74LS83).Connect GND Port to Pin-16 (Ground) of ICBase-3 (74LS83).