Integrated Circuits Used 74LS76 Procedure Add IC 74LS76 into ICBase-3 (74LS76).Add IC 74LS76 into ICBase-2 (74LS76).Connect VCC Port to Pin-16 (Input) of ICBase-3 (74LS76).Connect GND Port to Pin-8 (Input) of ICBase-3 (74LS76).