The aim of this project is to controlling a wheel chair and electrical devices by using MEMS accelerometer sensor (Micro Electro-Mechanical Systems) technology. MEMS accelerometer sensor is a Micro Electro Mechanical Sensor which is a highly sensitive sensor and capable of detecting the tilt. This sensor finds the tilt and makes use of the accelerometer to change the direction of the wheel chair depending on tilt. For example if the tilt is to the right side then the wheel chair moves in right direction or if the tilt is to the left side then the wheel chair moves in left direction. Wheel chair movement can be controlled in Forward, Reverse, and Left and Right direction.

1. HAND GESTURE
CONTROLLED
WHEEL CHAIR

2. INTRODUCTION

3. WORKING PRINCIPLE
0To move forward tilt the hand in
forward direction.
0To move in reverse tilt the hand in
backward direction.
0To turn right tilt the hand in right side.
0To turn left tilt the hand in left side.
0To stop hold the hand straight.

4. BLOCK DIAGRAM
TRANSMITTER SECTION

5. RECEIVER SECTION

6. REQUIREMENTS
Hardware Requirement:-
0 Power Supply
0 Micro-Controller
0 Accelerometer Sensor
0 MAX232
0 Zigbee Modules
0 DC motor
0 LCD
Software Requirement:-
0 Compiler:-PIC Compiler
0 Language:-PIC Basic

7. ADVANTAGES &
DISADVANTAGES

8. ADVANTAGES
0 It is easy to design and manufacture as all the
components are easily available.
0 It is portable and hence can be placed anywhere.
0 It has low cost of manufacturing
0 The C can be reprogrammed if any modification is
required.
0 Due to wireless communication data rate is faster .
0 Wireless makes ease of operation.
0 No need of lengthy wires.
0 Power consumption is less.

9. DISADVANTAGES
0 If power supply fails system won’t work
0 Failure of device/components may have dire
consequences, fatal accidents can occur.

10. FUTURE DEVELOPMENTS
0 We can also add an obstacle detection sensor in the
wheel chair.
0 Increase power capacity.

11. THE END
FOR MORE DETAILS EMAIL US ON dezirengineering@gmail.com