Animatronic Hand - by B.Siri, M.Aamani, Tanuja.A and Y.Sreya

Motivation -


 Robotics is one of the most advancing area of technology in recent years. It has the power to potentially reduce human effort of doing a task. We intend to start to understand and implement Robotic technology through this project.

           We will be building a gesture imitating animatronic hand which should imitate the gesture of real hand.

Architecture -


 The resistance of the flex sensor varies according to the change in its angle. The flex sensor value is fed to arduino as input, the arduino maps the sensor reading to the angle which the arm of servo motor needs to rotate.

Flex sensors are attached to the fingers glove which is worn on the hand whose gestures are to be imitated.Fingers of the robotic hand were made using pen barrels and springs. Strings are connected to the finger tips of the animatronic hand, these strings get pulled when the arm of the servo motor rotates resulting in the imitation of gestures. We need to use five flex sensors and five servo motors to imitate the motion of five fingers.

Coding -

flexposition=analogRead(flexsensor)
The above code snippet is used to read the sensor value and give it as an input to the arduino.

servoposition = map(flexposition,flex_min,flex_max,servomin,servomax)
servo = constrain(servoposition,servomin,servomax)
The above code snippet is used to map the input of flex sensor to the angle turn of the servo motor and to ensure that the angle turn lies in the given constraints.

Further ideas -

We can also include wrist rotation to this project by using a gyro sensor and stepper motor. The gyro sensor can be used to measure the angle the wrist needs to rotate. The input of the gyro sensor can be sent to the arduino which maps the input with the angle and direction the stepper motor needs to rotate. This project can also be converted into a wireless project by using bluetooth /nodeMCU.

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