Integrated Circuits Used 74LS08 Procedure Connect Pin-20 (VCC) of ICBase-1 (74LS08) to VCC Port.Connect Pin-16 (Input) of ICBase-1 (74LS08) to Input-1.Connect Pin-15 (Input) of ICBase-1 (74LS08) to Input-0.Add IC 74LS08 into ICBase-1 (74LS08).