Integrated Circuits Used 74LS08 Procedure Connect Input-0 to Pin-7 (Ground) of ICBase-1 (74LS08).Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS08).Connect GND Port to Pin-7 (Input & Output) of ICBase-2.Add IC 74LS08 into ICBase-1 (74LS08).