An automatic trash can is a trash can that can open and close its lid automatically without being touched. This system uses Arduino Uno, an HC-SR04 ultrasonic sensor to detect hand movements at a certain distance, and a servo motor to move the lid. When the ultrasonic sensor detects an object (e.g., a hand) within the specified distance, the Arduino instructs the servo to open the trash can lid. After a few seconds of inactivity, the lid will close automatically. This device helps improve cleanliness, hygiene, and convenience when disposing of trash.
Advantages
- Hygienic: No need to touch the lid, reducing germ contact.
- Practical: Lid opens automatically when a hand approaches.
- More modern & attractive: Suitable for homes, offices, or public facilities.
- Reduces odor: Lid closes automatically so trash is not exposed for too long.
Disadvantages
- Dependence on sensors: When sensors are dirty, readings can be inaccurate.
- Requires electricity/batteries, resulting in operational costs.
- Regular maintenance of servos and sensors is required.
- The lid cannot withstand heavy loads; servos can quickly break if forced.