BHARTI VIDYAPEETH COLLEGE OF ENGINEERING FOR WOMEN

DEPARTMENT OF ELECTRONICS AND TELECOMMUNICATION SYNOPSIS OF :

WIRELESS GESTURE BASED ROBOT USING MEMS [MICRO- ELECTRO-MECHANICAL] TECHNOLOGY

PRESENTED BY: JISHU VARGHESE PT JYOTI KADAM SWATI KARDILE

IN GUIDANCE OF:

PROF. M.S.KASAR SIR. 2014-2015TITLE: WIRELESS GESTURE BASED ROBOT USING MEMS TECHNOLOGY

INTRODUCTION:Gesture recognition technologies are much younger in the world of today. A Gesture Controlled robot is a kind of robot which can be controlled by hand gestures and not the old fashioned way by using buttons. The user just needs to wear a small transmitting device on his hand which includes a sensor which is an accelerometer in our case. Movement of the hand in a specific direction will transmit a command to the robot which will then move in aspecific direction. The transmitting device includes a Comparator IC for assigning proper levels to the input voltages from the accelerometer and an Encoder IC which is used to encode the four bit data and then it will be transmitted by an RF Transmitter module.At the receiving end an RF Receiver module will receive the encoded data and decode it by using a decoder IC. This data is then processed by a microcontroller and passed onto a motordriver to rotate the motors in a special configuration to make the robot move in the same direction as that of the hand. Accelerometer:An Accelerometer is a kind of sensor which gives an analog data while moving in X,Y,Z direction or may be X,Y direction only depends on the type of the sensor.

Here is a small image of an Accelerometer shown. We can see in the image that there are some arrows showing if we tilt these sensors in that direction then the data at that corresponding pin will change in the analog form.The Accelerometer having 6 pins-1- VDD- We will give the +5volt to this pin

2- GND- We simply connects this pin to the ground for biasing.3- X- On this pin we will receive the analog data for x direction movement.4- Y- On this pin we will receive the analog data for y direction movement.5-Z- On this pin we will receive the analog data for z direction movement.6- ST- this pin is use to set the sensitivity of the accelerometer 1.5g/2g/3g/4g.

SPECIFICATION:

Specification Of Project.

1.Wireless Data communication though 434 MHz RF transreceiver2.To sense gesture MEMS accelerometer is use(ADXL335-3 axis)3.Speed of robot: 150RPM motor/12Volt4.Power:Transmitter:9v batteryReceiver:12v/1Amph battery5.Direction of robot: Left, Right, Forward, Reverse(4)

Future scope/modification

We can use this principle in many gesture base technologies like wheelchair, computer mouse, vehicle control etc.

BLOCK DIAGRAM:

RF TRANSMTTERMCUENCODERDECODERRF RECIEVERCOMPARATORMOTOR DRIVERMOTORSACCELEROMETER

FIGURE.1

CIRCUIT DIAGRAM:

TRANSMITTING CIRCUIT

RECIEVING CIRCUIT

ADVANTAGES: