4. Introduction
Artificial hand is an electro-mechanical system
whose working is similar to human hand which
is instructed by microcontroller by the help of
signal generated from the sensor.
4
5. Objective
The aim of this project is to built a replica of
human hand which can assist in an environment
where precise control and complex movement
of hand is required like during surgery, defusing
a bomb, etc.
5
8. Microcontroller 8
A microcontroller is a control device which
incorporates a microprocessor and a memory
chip.
We have used Arduino Uno as a
microcontroller. The advantage of using
Arduino Uno is that it’s software has inbuilt
function for servomotor which makes the
programming much easier.
9. Potentiometer 9
Fig 4. Potentiometer Fig 5. Circuit view of
potentiometer
Fig 6. Leg description of potentiometer
10. Potentiometer 10
A potentiometer is a three-terminal resistor
with a sliding or rotating contact that forms
and adjustable voltage divider.
We have used a potentiometer having
variation from 0 ohm to 10K ohm.
12. Servo motors 12
A servomotor is a rotary actuator or linear
actuator that allows for precise control of
angular or linear position, velocity and
acceleration by the help of feedback.
We have used Tower Pro mini servo motor
with load carrying of 9g.
14. Construction of Mechanical Hand
Components used - waste pipe, thread, gloves,
servomotor, clipper, cardboard box.
Construction – Waste pipe is used as fingers
fixed inside gloves. One end of thread is
fastened to the tip of waste pipe and the other
to the clipper of servo motor. Servo motors
are fixed inside the cardboard box.
14
16. Working 16
Analog Input via
potentiometer
Signal stored in
microcontroller
memory
Microprocessor
processes analog
signals to digital signal
PWM is sent via
digital IO port to
servo feedback
Servo motion is
achieved
