System Diagram

Input Components

• Distance Sensor: Detects obstacles within a range of 30 cm and enables path adjustment.
• Buttons: Allow users to set the time, change modes, and reset the system.

Micro controller

• ATmega328PB Module:
  • Central processing and control unit.
  • Communicate between input components and output components.
• RTC module:
  • Ensure precise timekeeping and accurate alarm scheduling.

Output Components

• Motors and Wheels:
  • TT motors controlled via a motor driver to enable movement.
• Motor Driver:
  • Control motors to move forward and turn, limit current output.
• Speaker:
  • Emits a "Little Star" at ~80 dB to wake the user.
• LCD Display:
  • Displays the system time, alarm time, status, and animated emoticons.
• LED Indicator:
  • Displays system status, particularly when the LCD is off, to save battery.