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MEMS BASED ROBOT

Main Objective

The main aim of this project is to control a ppt(power point presentation) using

MEMS.The MEMS will be fixed to the hand. Whenever the hand moves in an direction!the mechanicalmovementof the hand will be recogni"ed b MEMS.MEMS converts

this mechanical hand movement in to e#uivalent electrical signals and sends it to the

microcontroller. The microcontroller receives this and controls the $$T for different

operations.

POWER SUPPLY

%ere is the circuit diagramof & ' regulator using popular *+ ,-. The *+ is a & 'olt

voltage regulator ,- with features such as internal current limit! safe area protection!

thermal protection etc. /0 ' transformer brings down the 12*' mains! / bridgerectifier rectifies it and capacitor -/ filters it and *+ regulates it to produce a stead

+' 3- output.

AT89S52 Microcontroller

The T&S+1 is a low4power! high performance -M5S 4bit microcontroller with 6

btes of in4sstem programmable 7lash memor. The on4chip 7lash allows the program

memor to be reprogrammed in4sstem or b a conventional nonvolatile memor pro4

grammer. 8 combining a versatile 4bit -$9 with in4sstem programmable 7lash on a

monolithic chip! the tmel T&S+1 is a powerful microcontroller which provides a

highl4flexible and cost4effective solution to man embedded control applications.

eat!re"#

:.*' to +.+' 5perating ;ange

7ull Static 5peration< * %" to 22 M%"

Three4level $rogram Memor =oc>

1+0 x 4bit ,nternal ;M

21 $rogrammable ,?5 =ines

Three /04bit Timer?-ounters

Eight ,nterrupt Sources7ull 3uplex 9;T Serial -hannel

3ual 3ata $ointer

$ower4off 7lag

7ast $rogramming Time

MEMS "en"or$ Driver

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Me%" "en"or#

micro4Elecromechanical Sstem (MEMS) sensor is usuall constructed b similar

mas>ing?etching process as microchips. The MEMS sensor@s wor>ing principle a

common MEMS sensor is an accelerometer to measure acceleration. ,n such a sensor! a

relativel large piece of silicon can be suspended b thin pieces and its motion ismonitored

Motor &river

The Eas 3river is a simpleto use stepper motor driver! compatible with anthing that

can output a digital * to +' pulse. Eas 3river re#uires a ' to 2*' supplto power the

motor! and has an on board voltage regulator for the digital interface. -onnect a :4wire

stepper motor and a microcontroller and ou@ve got precision motor controlA Eas 3river

drives bi4polar motors! and motors wired as bi4polar. ,.e. :!0! or wire stepper motors.

MEMS TE'()OLO*Y

Micro4Electro4Mechanical Sstems! or MEMS! is a technolog that in its most general

form can be defined as miniaturi"ed mechanical and electro4mechanical elements (i.e.!

devices and structures) that are made using the techni#ues of micro fabrication. The

one main criterion of MEMS is that there are at least some elements having some sort

of mechanical functionalit whether or not these elements can move .The term used to

define MEMS varies in different parts of the world. ,n the 9nited Statesthe are

predominantl called MEMS! while in some other parts of the world the are called

BMicrosstems TechnologC or Bmicro machined devicesC

+MPLEME)TAT+O)

robot can operated actuall b using a remote !but in our project robot is operated

with the basis of hand gestures. Desture -ontrolled robot is a >ind of robot which can

be controlled b our hand gestures not b old buttons. ou just need to wear a small

transmitting device in our hand nothing but mems sensor. This will transmit an

appropriate command to the robot so that it can do whatever we want. The transmitting

device included a comparator ,- for analog to digital conversion and an encoder ,c

which is use to encode the four bit data

'O)'LUS+O)

This $$T is controlled b the hand using MEMS technolog! MEMS converts

this mechanical hand movement in to e#uivalent electrical signals and sends it to the

microcontroller. The microcontroller receives this and controls the robot!and it is user

friendl available for all.

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SOFTWARE AND HARDWARE TOOLS:

Software Tools:

1. Keil compiler

2. Orcad.

3. Proload

Hardware Tools:

1. Microcontroller AT89S52.

2. MEMS sensor

3. MAX232 PC Connector

Block diagram

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