Abstract: The project titled Bluetooth-Controlled Pick and Place Robot focuses on designing and implementing a versatile robotic system capable of performing pick-and-place operations via wireless control using Bluetooth technology. The system integrates an Arduino Uno microcontroller as the central processing unit, coordinating the actions of various components, including a motor driver (L298N or similar) to regulate the movement of four 100 RPM geared motors responsible for the robot's mobility, enabling omnidirectional or differential drive functionality depending on the configuration. A 3-cell Li-ion battery provides the necessary power supply, ensuring sufficient voltage and current to drive both the locomotion and the robotic arm mechanisms. The robotic arm consists of two additional geared motors—one for vertical lifting along a single axis and another for operating a gripper mechanism to grasp and release objects. The HC-05 Bluetooth module facilitates wireless communication between the robot and a user interface (such as a smartphone or computer), allowing real-time control through custom-developed software that transmits commands like forward, reverse, left, right, lift, lower, open gripper, and close gripper. The project emphasizes modularity, cost-effectiveness, and scalability, making it suitable for applications in industrial automation, educational demonstrations, or domestic assistance. Key challenges addressed include power management to prevent voltage drops, motor torque optimization for lifting varying weights, and ensuring stable Bluetooth connectivity to avoid latency issues. The system's performance is evaluated based on precision in object handling, battery life, and responsiveness to control inputs. Future enhancements may incorporate sensors (ultrasonic, IR, or load cells) for autonomous obstacle avoidance and feedback mechanisms, as well as IoT integration for remote monitoring. This project serves as a foundational framework for advancing wireless robotic systems, demonstrating the practical integration of mechanical design, electronic control, and wireless communication technologies in a functional pick-and-place robot.

Keywords: Bluetooth-Controlled Robot; Arduino Uno Microcontroller; Motor Driver and Mobility; Robotic Arm Mechanism; Wireless Communication; Modularity and Scalability; Power Management; Practical Integration

| DOI: 10.17148/IARJSET.2025.125372