Integrated Circuits Used 74LS08 Procedure Connect Pin-20 (VCC) of ICBase-2 (74LS08) to Pin-2 (Input) of ICBase-2 (74LS08).Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS08).Add IC 74LS08 into ICBase-2 (74LS08).