<![CDATA[The issue of PET plastic waste has driven the development of an automatic shredder machine based on Arduino with RFID security. This research employs the R&D method, utilizing key components including the HC-SR04 ultrasonic sensor, DC motor, and RFID RC522 module. Test results demonstrate optimal performance with 96% sensor accuracy and a security system that only responds to registered cards. This device is effective for small-scale recycling, equipped with LED indicators and a buzzer alarm. Its main advantages are process automation and increased community participation in recycling. Future development can focus on capacity improvement by replacing blades with a crusher and IoT integration. This innovation offers a practical solution for plastic waste management while supporting the circular economy.]]>
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