Procedure
- Connect Pin-11 (Input & Output) of ICBase-1 to Pin-5 (Input & Output) of ICBase-4.
- Connect Pin-1 (Input & Output) of ICBase-3 to Pin-12 (Input & Output) of ICBase-1.
- Connect Pin-19 (Input & Output) of ICBase-4 to Pin-13 (Input & Output) of ICBase-1.