VOICE OPERATED WHEEL CHAIR www.techtriks.wordpress.com

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VOICE OPERATED WHEEL CHAIRwww.techtriks.wordpr
ess.com
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Group Members Nisha M S ECU032/48 Sapna
Vasudevan ECU032/32 Tintu Mary
Skariah ECU032/40 Senthil Kumar ECU032/34 Pri
yanka Susan George ECU032/29 Project website
www.techtriks.wordpress.com Project Guide Mr.
Rajesh M V Sr. Lecturer Dept. of
Electronics Project Co- ordinator Mrs. Jibi
John Sr. Lecturer Dept. of
Electronics
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AIM

• To control the movement of a manual wheelchair by
  means of human voice for paralyzed patients.
  
  
  

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BLOCK DIAGRAM
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SPECIFICATIONS

• 1.MICROCONTROLLER PIC16F877
• 2.VOICE RECOGNITION IC (options)
• a)HM2007 b) ISD 2500 c) MSM6679
• 3. MOTOR DRIVER CIRCUIT (options)
• a) H-BRIDGE CIRCUIT USING MOSFET
• b) H-BRIDGE IC LMD18245,LMD18200
• 4.MOTORS(DC) (options)
• a) GEAR DRIVEN
• b) CHAIN DRIVEN
• c) HUB MOTOR
• 5.BATTERY
• 6.BATTERY CHARGER CIRUIT

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• VOICE RECOGNITION IC
• ACCEPTS THE VOICE INPUT SIGNAL
• SPEED AND DIRECTION RECORDED
• MICRO CONTROLLER
• PROCESSES DATA
• PROVIDES CONTROL VOLTAGE TO MOTORS
• DC MOTORS
• DRIVES THE WHEELS OF THE CHAIR IN
• NECESSARY MODES

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VOICE RECOGNITION IC

• Its a single chip CMOS voice recognition module
  with on-chip ADC, Voice analysis, Recognition
  process and system control functions.
• A 10-40 isolated word voice recognition system,
  can be interfaced with external memory, key
  board, microphone etc.
• Speaker dependant and speaker independent modules
  available

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MICRO CONTROLLERPIC16F877

• High performance RISC CPU
• Only 35 single word instructions to learn
• All single cycle instructions except for program
• branches which are two cycle
• Operating speed DC - 20 MHz clock input
• DC - 200 ns instruction cycle
• Up to 8K x 14 words of FLASH Program Memory,
• Up to 368 x 8 bytes of Data Memory (RAM)
• Up to 256 x 8 bytes of EEPROM Data Memory
• Up to 8K x 14 words of FLASH Program Memory,
• Up to 368 x 8 bytes of Data Memory (RAM)
• Up to 256 x 8 bytes of EEPROM Data Memory

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MOTOR DRIVER

• H bridge circuit used for controlling the DC
  motors.
• CMOS/IGBT H-bridge modules available with
  different current and voltage specifications.

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• THANK YOU