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ABSTRACT
Gesture Vocalizer is a microcontroller based system being designed to facilitate the communication among the dumb, deaf communities and their communication with the normal people.
This system can be dynamically reconfigured to work as a ‘’smart device’ in controlling operation of any device or application remotely using only hand gestures.
In this project we are implementing one application to demonstrate gesture vocalizer process. For this we are using MMC card, CODEC module, ATMEGA8, MMA7660 and speakers. Here we are implementing this overall project for predefined voices.
ATmega8 - RISC Architecture
 130 Instructions – Most Single-clock Cycle Execution
 32 x 8 General Purpose Working Registers
 64 x 8 Special Function Registers (I/O Registers)
 Up to 16 MIPS Throughput at 16 MHz
 On-chip 2-cycle Multiplier
Nonvolatile Program and Data Memories
 8K Bytes of In-System Self-Programmable Flash
10,000 Write/Erase Cycles
 Optional Boot Code Section with Independent Lock Bits
 512 Bytes EEPROM (100,000 Write/Erase Cycles)
 1K Byte Internal SRAM
 Programming Lock for Software Security
Peripheral Features
 Two 8-bit Timer/Counters
 One 16-bit Timer/Counter with Capture Mode
 Real Time Counter with Separate Oscillator
 Three PWM Channels
 6-channel ADC with 10 resp 8 Bit resolution (TQFP: 8 channels)
 Two-wire Serial Interface (TWI)
 Programmable Serial USART
 Master/Slave SPI Serial Interface
 Programmable Watchdog Timer with On-chip Oscillator
 On-chip Analog Comparator
Special Microcontroller Features
 Programmable Brown-out Detection
 Internal Calibrated RC Oscillator
 External and Internal Interrupt Sources
 Five Sleep Modes
I/O and Packages
 23 Programmable I/O Lines
 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
ACCELEROMETER
DEFNITION:
 sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument.
 They are used for various purposes including measurement or information transfer.
MEMS
DEFINITION:-
Micro-Electro-Mechanical Systems, or MEMS, is a technology that in its most general form can be defined as miniaturized mechanical and electro-mechanical elements (i.e., devices and structures) that are made using the techniques of microfabrication.