Let’s Press a Button

A Button or Switch is a Human Interface to the hardware, it accept input from the User, just like a PC user typing on the keyboard.

Schematic Diagram:   Consider Switch S0 (Active Standby Switch), when you press this button, the Intel 8051 core MCU will know it because you are sending a logic 0 where the MCU can detect it.

 

To be Continued……..   !