Integrated Circuits Used 74LS04 74LS32 74LS08 Procedure Add IC 74LS04 into ICBase-5 (74LS04).Add IC 74LS32 into ICBase-4 (74LS32).Add IC 74LS08 into ICBase-3 (74LS08).Connect Pin-20 (VCC) of ICBase-5 (74LS04) to Seven segment display 1.