Explain the concept of hardware interrupts. What are its advantages over polling? How are timer interrupts implemented in the AVR? What is the

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  1. Explain the concept of hardware interrupts. What are its advantages over polling?
  2. How are timer interrupts implemented in the AVR?
  3. What is the procedure for setting the actual time on the RTC module?
  4. What are the advantages of using the I2C interface for connecting the LCD display?

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