Procedure
- Add IC 74LS20 into ICBase-2 (74LS20).
- Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS20).
- Connect GND Port to Pin-7 (Ground) of ICBase-2 (74LS20).
- Connect Input-9 to Pin-2 (Input) of ICBase-2 (74LS20).
- Connect Input-9 to Pin-3 (Input & Output) of ICBase-2 (74LS20).