Integrated Circuits Used 74LS83 Procedure Add IC 74LS83 into ICBase-2 (74LS83).Connect VCC Port to Pin-17 (Input) of ICBase-2 (74LS83).Connect GND Port to Pin-16 (Ground) of ICBase-2 (74LS83).Connect Input-9 to Pin-1 (Input) of ICBase-2 (74LS83).