Procedure
- Connect Output-15 to Pin-1 (Input & Output) of ICBase-1.
- Connect Input-15 to Pin-2 (Input & Output) of ICBase-1.
- Connect Input-5 to Pin-1 (Input & Output) of ICBase-3.
- Connect Pin-4 (Input & Output) of ICBase-3 to Input-4.
- Connect Output-2 to Pin-20 (Input & Output) of ICBase-3.