Procedure
- Connect Pin-4 (Input & Output) of ICBase-3 to Pin-20 (Input & Output) of ICBase-2.
- Connect Pin-8 (Input & Output) of ICBase-3 to Pin-19 (Input & Output) of ICBase-2.
- Connect Pin-1 (Input & Output) of ICBase-3 to Pin-11 (Input & Output) of ICBase-2.
- Connect Pin-6 (Input & Output) of ICBase-4 to Pin-17 (Input & Output) of ICBase-3.
- Connect Pin-3 (Input & Output) of ICBase-4 to Pin-14 (Input & Output) of ICBase-3.