Procedure
- Connect Pin-20 (Input & Output) of ICBase-1 to Pin-1 (Input & Output) of ICBase-2.
- Connect Pin-12 (Input & Output) of ICBase-1 to Pin-2 (Input & Output) of ICBase-2.
- Connect Pin-10 (Input & Output) of ICBase-3 to Pin-20 (Input & Output) of ICBase-2.