Microcontroller Based Hand Gesture Controlled Robotic Arm

Team Member Are :
Vivek G. N - 4SO10EE050
Manhar Gafoor - 4SO10EE029
Balu Abraham Kurian - 4SO10EE009
Joyal John - 4SO10EE022

Project Guide: Mr. Subramanya K Abstract: The robotic arm consists of a total of 3 Servos, connected in such a way that it provides 2 DOF’s (Degrees of Freedom) to the system. A micro controller PIC16F877A is used which takes the output values of an accelerometer and sends the data accordingly to the servos. Two servos are used, one at the base and the other at joint of the arm. At the apex, a mini servo is connected with the help of gears to control the Grabber of the robot. The robotic arm mimics the movement of glove worn by the user, when the glove is tilted in the forward direction or any such direction, the arm spontaneously follows suit. The Grabber functions with the use of a flex sensor attached to the index finger, the degree of movement of the finger determines the angle of the mini servo which is attached to the gears controlling the movement of the grabber. Main/Unique Features: • High torque light weight servomotors are used • Pulse width modulated control of the servomotor • Controlling the position of the rotor of the servomotors using accelerometer and flex sensor • Light weight frame using aluminum and plastic gears

Analysis & Design of Integrated Double Buck-Boost Converter for power LED lamps

Team Member Are :
Anish Abraham - 4SO10EE004
Nitin William Rodrigues - 4SO11EE411
Joffin George - 4SO10EE021
Lovin Nitesh Crasta - 4SO10EE026

Project Guide : Mr. Ajithanjaya Kumar M K Abstract: A prototype of an high power factor offline power supply using an integrated double buck boost converter (IDBB) for power LED lamps. The IDBB converter comprises of a controlled switch and two inductors offering good efficiency and high power factor while supplying the solid state lamps from the mains. The project imbibes a design technique which reduces the filter capacitance paving the way for the use of film capacitors. A 70-W converter which is supplied from 230 V/50 Hz supply is designed for street light application. Main/Unique Features: • Provides unity power factor. • Maintains constant dc voltage. • Offers the stringent operating conditions for the operation of the white LEDs. • Proposes the white LEDs as an alternative instead of fluorescent and discharge lamps for street lightening.

The Will Chair

Team Member Are :
Chaitanya Nithyananda Das - 4SO10EE013
Hithesh Bhat K - 4SO10EE018
Madhura R - 4SO10EE028

Project Guide : Mr. Deepesh Kanchan Abstract: The project aims to provide the paraplegic an easy method of control of their wheelchairs, eliminating the need of assistance from others: In general, it is seen that paraplegics require the assistance of others to push their wheelchairs. This is because the physical effort needed to push the wheels might be too straining for the patient. This machine will allow them to control the movement of the chair on their own using minimal physical effort. This would greatly help their self-esteem as they would not need to depend on others to go about their daily routines. The system consists of a remote which take input from the hand gestures. It does so, by the help of accelerometer module which is placed in the remote. The analogue data now has to be converted to digital fashion which has to be transmitted using RF signals. Four digital outputs are obtained from this stage. An encoder is used here to attach an address and obtain a corresponding 12-bit data signal which consists of 8-bit address and 4-bit data. This signal is then given to a Transmitter module which will transfer the data with the help of an antenna. The vehicle mainly consists of a RF-receiver module, decoder, logic-circuit, motor-driver and DC motors. The RF-receiver receives the signal with help of antenna connected only when the 8-bit address set in encoder and the decoder are same. The decoder converts the signals into 4-bit data which can be obtained in its output pins. The output with a combination of two each is given as input to logic circuit which gives the input to the drive circuit. The drive makes the DC motor to rotate in either forward or reverse direction depending on the motion required. If it has to run forward, motors are turned forward and reverse for the backward motion. For left and right motions, one of the motor is made to rotate forward and the other is rotated in reverse direction. Main/Unique Features: • A hand gesture controlled wheelchair for paraplegics/patients eliminates need for assistance or extensive physical effort. • The RF receiver requires a particular address to run. Our design allows us to have 256 such unique addresses on the same unit, allowing the control of 256 unique systems in the locality at the same frequency without interference.