Open/close curtains automatically with light and time rules.

Build a door-status notifier that alerts when opened for safety and awareness.

Control a fan automatically based on temperature and time of day.

Detect a fridge door left open and provide a reminder.

Design a mini traffic-light system to learn timing and safety flow.

Measure UV exposure and display simple safety guidance.

Remind users to limit faucet time with light and sound cues.

Decide when to open windows by checking temperature and air quality.