International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 12 Issue: 09 | Sep 2025
p-ISSN: 2395-0072
www.irjet.net
Bluetooth-Controlled Paper Shredder Using Arduino Uno and HC-05 Team: - Sumedh Bhilarkar, Spursh Kharmate, Parth Harde Department of Mechanical Engineering, MMCOE Karvenagar Pune, 52 ---------------------------------------------------------------------***--------------------------------------------------------------------1.2 Overview of Components Abstract - This project presents the design and implementation of a Bluetooth-controlled paper shredder using Arduino Uno and the HC-05 Bluetooth module. The shredder motor is controlled wirelessly through a smartphone using a Bluetooth Serial Monitor application. The Arduino Uno acts as the central controller, receiving commands from the Bluetooth module and switching the shredder motor via a relay driver. This approach reduces manual effort, increases convenience, and provides a lowcost solution for document destruction and security. Experimental results demonstrated reliable motor operation, stable wireless connectivity, and minimal response delay, making the system suitable for small-scale office and personal use.
Arduino Uno: Serves as the central processing unit, interpreting Bluetooth signals and controlling the motor. HC-05 Bluetooth Module: Enables wireless communication between the smartphone and Arduino. Relay Driver Module: Acts as an interface between the low-voltage control circuit and the shredder motor. Paper Shredder Motor: Executes the shredding operation when powered via relay switching. Smartphone with Bluetooth Serial Monitor App: Provides the wireless interface for sending commands such as “ON” and “OFF.”
Key Words: Paper Shredder, Arduino Uno, HC-05 Bluetooth Module, Relay Driver, Wireless Control,
2. SYSTEM COMPONENTS AND CONNECTIONS
Document Security
The shredder is controlled by the Arduino Uno, which receives wireless commands from the HC-05 Bluetooth module. The Arduino then activates or deactivates a relay driver circuit to switch the shredder motor.
1. INTRODUCTION Document security is a major concern in both personal and professional environments. Paper shredding is one of the most effective ways to dispose of confidential information securely. Conventional shredders typically require manual operation through physical switches, which may limit convenience. With the increasing adoption of automation and wireless technology, the need arises for a more efficient and user-friendly solution.
Connections: 1.HC-05 Module: VCC to 5V, GND to GND, TX to RX (Arduino pin 0), RX to TX (Arduino pin 1, via voltage divider) 2.Relay Module: IN to Arduino digital pin, VCC to 5V, GND to GND
This project introduces a smart paper shredder that integrates an Arduino Uno microcontroller with an HC-05 Bluetooth module. The system allows the shredder motor to be controlled wirelessly using a smartphone and a Bluetooth Serial Monitor application. This not only enhances ease of use but also demonstrates how simple embedded systems can be adapted to improve traditional machines.
3.Shredder Motor: Connected to relay output terminals for power switching This setup ensures safe and reliable operation of the shredder motor while maintaining wireless control. Arduino Uno: The Arduino Uno is an open-source microcontroller board based on the ATmega328P. It acts as the brain of the paper shredder system by processing incoming Bluetooth commands from the HC-05 module and controlling the motor through a relay driver. The Uno provides 14 digital input/output pins, 6 analog inputs, a USB connection for programming, and a 16 MHz quartz crystal for stable operation. It is widely used for embedded and automation projects due to its simplicity, cost-effectiveness, and
1.1 Motivation and Objective The motivation behind this project is to create a costeffective and accessible shredder system that eliminates manual switching. The objective is to design a Bluetoothbased control system that is reliable, easy to implement, and suitable for practical applications in households and small offices.
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