At the receiver side, the Zigbee receiver transfers the received data to the Arduino UNO microcontroller, which controls the servo motors connected to the robotic arm and gripper mechanism. Based on the hand gestures and finger movements, the robotic arm performs up-down, left-right, open-close, and pick-and-place operations accurately. The proposed system provides efficient wireless control, reduced human effort, and improved flexibility in robotic applications. This technology can be widely used in medical assistance systems, industrial automation, and remote object handling applications.

OBJECTIVES:

1. To design a wireless robotic arm system using Flex sensors, MEMS sensors, and Zigbee communication technology.
2. To control robotic arm movements through hand gestures and finger bending motions for pick-and-place operations.
3. To transmit sensor data wirelessly using Zigbee modules between the transmitter and receiver sections.
4. To interface Arduino Nano and Arduino UNO microcontrollers for processing sensor inputs and controlling servo motors effectively.
5. To assist physically challenged and paralysis patients by developing an easy-to-use robotic arm for object handling applications.

The major building blocks of this project are:

• Regulated power supply.
• Battery Supply (3.7V).
• Arduino uno Microcontroller.
• Arduino nano.
• Flex sensor.
• MEMS sensor.
• Zigbee transmitter and receiver modules.
• 4-Servo motors.
• Robotic arm.
• Hand glove.
• LED indicators.

Software’s used:

1. Arduino IDE for compiling and dumping code into Microcontroller.
2. Express SCH for Circuit design.

BLOCK DIAGRAM:

video:

The main objectives of the project are:

• Develop a prosthetic finger that is both mechanically functional and ergonomically suitable for users. This involves designing a 3D-printed finger structure that is lightweight, durable, and comfortable to wear.
• Implement a flex sensor within the prosthetic finger to accurately detect and measure the degree of bending. This sensor will provide real-time data on finger movement, essential for controlling the prosthetic’s functionality.

• Employ an Arduino UNO microcontroller to process the data received from the flex sensor. The microcontroller will interpret the sensor’s readings and translate them into control signals for the servo motor.

The major building blocks of this project are:

1. Arduino UNO
2. Flex sensor.
3. Servo motor.
4. 3D finger.

Software’s used:

1. Arduino UNO Microcontroller compiling and dumping code into Microcontroller.
2. Express SCH for Circuit design.

Block diagram:

video:

This flex sensor is a unique component that changes resistance in proportion to the degree it is bent.  The sensor when lying flat has a nominal resistance of 10,000 ohms (10K). As the flex sensor is bent the resistance increases in proportion. At 90 degrees the sensors resistance will increase to approximately 35,000 ohms (35K).This device is very helpful for paralysis and physically challenged persons.

Zigbee is a PAN technology based on the IEEE 802.15.4 standard. Unlike Bluetooth or wireless USB devices, Zigbee devices have the ability to form a mesh network between nodes. Meshing is a type of daisy chaining from one device to another. This technique allows the short range of an individual node to be expanded and multiplied, covering a much larger area.

This project makes a use of MEMS, flex sensor, zigbee tx, zigbee rx, arduino nano, arduino UNO, Servo motors along with gripper.

The MEMS sensor is uses for rotational velocity along the X, Y, Z axes to control the up and down motion of robotic arm. Flex sensor gives resistance value in accordance to the direction which it is bent to control the ARM fingers. These values are fed to the arduino nano microcontroller. This data is transmits with the help of Zigbee transmitter module and received by zigbee receiver also fed as same to the arduino UNO.

The Servo motors along are interfaced to the arduino UNO microcontroller. Based on the received data arduino will control the direction of ARM. This ARM will control the up-down and open-close motions to pick and place the objects.

The main objectives of the project:

• Designs a wireless control robotic ARM.
• Hand gesture using MEMS and FLEX sensor.
• Wireless communication using Zigbee technology.
• To achieve this task using arduino uno, nano Microcontroller.

The major building blocks of this project are:

• Regulated power supply.
• Battery Supply(9v,12v).
• Arduino uno Microcontroller.
• Arduino nano.
• Flex sensor.
• MEMS sensor.
• Zigbee transmitter and receiver modules.
• 4-Servo motors.
• Robotic arm.
• Hand glove.
• LED indicators.

Software’s used:

1. Arduino IDE for compiling and dumping code into Microcontroller.
2. Express SCH for Circuit design.

BLOCK DIAGRAM:

video: