Procedure
- Connect Input-4 to Pin-1 (Input & Output) of ICBase-3.
- Connect Input-3 to Pin-2 (Input & Output) of ICBase-3.
- Connect Output-4 to Pin-3 (Input & Output) of ICBase-3.
- Connect Pin-3 (Input & Output) of ICBase-2 to Pin-1 (Input & Output) of ICBase-3.
- Connect Pin-17 (Input & Output) of ICBase-2 to Pin-2 (Input & Output) of ICBase-3.
- Connect Pin-2 (Input & Output) of ICBase-3 to Pin-16 (Input & Output) of ICBase-3.