Procedure
- Connect Pin-1 (Input & Output) of ICBase-4 to Pin-20 (Input & Output) of ICBase-3.
- Connect Pin-2 (Input & Output) of ICBase-4 to Pin-19 (Input & Output) of ICBase-3.
- Connect Pin-9 (Input & Output) of ICBase-4 to Pin-18 (Input & Output) of ICBase-3.
- Connect Pin-10 (Input & Output) of ICBase-3 to GND Port.