73. Sleep Mode with Button Press Wake-Up

Build a power-efficient system using the microcontroller with the following functionality:

• The microcontroller will be in power-saving mode to save power.
• When a push button switch connected to the microcontroller is pressed:
  • Wake up from power-saving mode.
  • Read the ADC value of a potentiometer connected to the microcontroller.
  • Print the ADC value on the serial terminal (e.g., Putty, Arduino IDE).
  • Return back to power-saving mode.
• The system repeats the process each time the push button switch is pressed.