You can punch the lid of the dustbin without touching the dustbin and put the garbage directly into the dustbin, which can help keep the environment clean and hygienic. A motor is installed on the lid of the dustbin to open / close the lid, and the HC-SR04 sensor is used to detect objects approaching it, it opens when it senses human approach, and closes when it leaves. This bin is useful in crowded places such as shopping malls, offices, schools, universities and hospitals.
Most cities, towns and villages do not have good garbage collection equipment. Even when the bins start to overflow, no one cleans them up. This smart bin could be a good solution in this situation, as it will send an alert when the bin gets full.
This smart bin has the following features:
- The litter box opens automatically when someone approaches, maintaining a touchless process and hygiene.
- The trash can alerts the garbage collector when it needs to be emptied. As a result, municipal corporations can collect waste in time before it starts to overflow, preventing overflow.
- The use of smart waste bins in hospitals can prevent the spread of harmful substances and reduce the incidence of infections.
circuit and work
The circuit diagram of the smart dustbin is shown in the figure below. It is built using Arduino Uno Board1 , HC-SR04 Ultrasonic Sensor US1 and Servo M1 .
When the ultrasonic sensor detects hand (other object) movement in front of the litter box, it generates a signal on its Echo and Trigger pins. This signal is received and processed by the controller (Arduino) and then sent to its digital output pins. The signal is sent to the servo MG90S to rotate the hopper lid attached to it by the required number of degrees. The degree of rotation is determined by the size of the litter box lid and requires trial and error to set.
The project can be extended by using load cells and GPS sensors. The load cell can sense the weight of the bin. When the bin is full or weighs over a certain limit, it sends an alert signal via GPS to the nearest municipality or relevant waste collector. The exact location of the bins can be tracked by GPS latitude and longitude coordinates on the map .
build and test
Assemble circuit components on a general-purpose PCB . Before connecting the sensors and servos to the Arduino , upload the source code dustbin_EFY.ino to the Arduino via the Arduino IDE . To power the Arduino Uno board, a 9V PP3 battery with a 2.1mm DC plug can be used.
Servo mounted in cover
Place the circuit in a suitable box and secure it properly in the litter box.
