1. Temperature and Humidity Monitor: Build a sensor-based system that measures and displays temperature and humidity levels in real-time.
2. Smart Home Automation: Create a home automation system using Arduino to control lights, appliances, and other devices.
3. RFID Door Lock: Develop a door lock system that uses RFID technology for access control.
4. Obstacle Avoiding Robot: Build a robot capable of detecting and avoiding obstacles using ultrasonic sensors.
5. Weather Station: Construct a weather monitoring system that measures and displays temperature, humidity, pressure, and rainfall data.
6. Digital Thermostat: Design a digital thermostat to regulate and control the temperature of a room or a device.
7. Arduino Piano: Create a musical instrument using Arduino and sensors to play different notes and melodies.
8. Plant Watering System: Develop an automated watering system for plants that senses soil moisture and waters them accordingly.
9. Home Security System: Build a security system that includes features such as motion detection, alarms, and surveillance cameras.
10. Morse Code Translator: Create a device that translates text or messages into Morse code and vice versa using Arduino and an LCD display.