Procedure
- Connect Pin-4 (Input & Output) of ICBase-1 to Input-4.
- Connect Pin-10 (Input & Output) of ICBase-2 to Pin-4 (Input & Output) of ICBase-1.
- Connect Pin-4 (Input & Output) of ICBase-3 to Pin-10 (Input & Output) of ICBase-2.
- Connect Pin-4 (Input & Output) of ICBase-3 to Pin-10 (Input & Output) of ICBase-4.
- Connect Pin-5 (Input & Output) of ICBase-1 to Pin-2 (Input & Output) of ICBase-1.
- Connect Pin-12 (Input & Output) of ICBase-2 to Pin-5 (Input & Output) of ICBase-1.