Accelerometer Based Mouse 1a6122

Accelerometer based mouse ‘smart mouse’

MOUSE??  Interfacing between and computer  Current mouse:- Ball, Optical  Needs a pad or flat surface  Limits working space

WHY SMART MOUSE?? SMART MOUSE (using MEMS Accelerometer)

• Can be attached on ’s body (e.g. hand) • Eliminates problems in a notebook computer  Simply by hand gestures the computer can be

controlled, thus making it very comfortable

 Portable

INTRODUCTION  Wireless mouse  Communicates with pc using a wireless link  Mouse actions such as cursor movement, left click,

right click  Accelerometer- converts hand movements into cursor movements

PROJECT CONTENTS:  MEMS  Microcontroller  RF module

MEMS  MEMS is MICRO ELECTRO MECHANICAL SYSTEM  Acts as mechanical elements, sensors, actuators, electronic

on a common silicon substrate.  MEMS converts physical stimuli ,events and parameter

to electrical and optical signals and vice-versa.  It measure acceleration, motion, vibration, shock,

tilt.

PROJECT DEFINITION  In this project there will be two section master and slave.  The slave part will contain MEMS sensor. The MEMS sensor will be connected to PIC controller.  The PIC is connected to the RF Module transceiver using SPI.  The Master part will connected to the PC.  The output X, Y of MEMS Sensor will be given to PIC and also to RF. The sensor data will be send wirelessly  to the Master part and according to it move the cursor. Also the left and right click will be control using keys.

HARDWARE SPECIFICATIONS PIC MICROCONTROLLER : • High performance, low cost 8-bit micro-controller • RISC Architecture • Low power consumption

• s SPI and I2C™ Master and Slave modes • 10-Bit, up to 11-Channel Analog-to-Digital Converter module (A/D)

• Modes ed: Run,Idle,Sleep • Operating frequency up to 20 MHz • Wide operating voltage range: 2.0V to 5.5V

MEMS ACCELEROMETER : • An accelerometer is a sensing element • Measured in units of g • Low height surface mount package • 2.70V to 5.25V single supply operation • Low cost , dual axis accelerometer • Measure both dynamic acc.(e.g. vibration) & static acc.

(e.g. gravity) • Operational over -10°C to +85°C temperature range.

RF MODULE : •Low power consumption

•High sensitivity •Operation voltage : 1.8 ~ 3.6 Volts •Operation temperature range : -40~+85 deg C •Available frequency at : 2.4~2.483 GHz- No certification required from government

•High accuracy • Low cost

SOFTWARE SPECIFICATIONS • Programming in ‘C’ language • Protel software for PCB deg

BLOCK DIAGRAM Sensors

PC

Microcontroller

Microcontroller

Wireless Module

Wireless Module

SENSOR  An accelerometer is a sensing element  Measured in units of g.  Measures: vibrations, shocks, tilt, impacts and motion of

an object.

TYPES OF ACCELEROMETER Capacitive Piezoelectric Piezoresistive Hall Effect Magnetoresistive Heat Transfer

CAPACITIVE ACCELEROMETER • Most commonly used • Capacitor formed between field electrode and mobile electrode

• Acceleration  Change in capacitance  Change in output voltage

MICRO CONTROLLER • Accepts data from sensor • Forms data packet

X direction relative movement Y direction relative movement Left Click

Right Click

• Sends packet to wireless module

WIRELESS MODULE  

Communicates data packets to PC Wireless technologies available: i. ZigBee ii. Wi-Fi iii. Bluetooth iv. IR Wireless

ALGORITHM: 1. Sensor sense the x and y movement. 2. Initialize the ADC routines. 3. Calibrate that ADC routines. 4. Encodes the data into form of packets. 5. Initialize the RF module. 6. RF module sends that packet over a wireless channel. 7. Initialize RF receiver 8. Sends to the microcontroller. 9. Microcontroller decode the data. 10. Covert to the PS2 format. 11. Covert in the form of USB protocol format. 12. Send it to the pc.

APPLICATIONS •

Controlling devices in unmanned places

•

Astronauts in spacecrafts

•

Pointer for conferences

•

Joystick/Controller for games

CONCLUSION  Thus we are going to design mouse which consumes

less power than existing system  It is more portable, accurate & easy to handle.

BIBLIOGRAPHY 1. 2. 3. 4. 5. 6.

Oldmouse.com http:/www.oldmouse.com/mouse/hawley Pdf on IEEE- A mouse Tryengineering-www.tryengineerin.org http://www.wikipedia.org/ Two-Dimensional Position Detection System with MEMS Accelerometer for MOUSE Applications ( Seungbae Lee, Gi-Joon Nam, Junseok Chae, Hanseup Kim, and Alan J. Drake) 7. Measurement System of Walking Distance Using Low-cost Accelerometers (Seong Yun Cho , Chan Gook Park and Gyu In Jee ) 8. http://www.uchobby.com/index.php/2007/10/27/accelerometer-basedmouse 9. Analog Devices http://www.analog.com/ 10. ACCELEROMETER MOUSE(MANAV KATARIA,VINU BHASKAR ABHISHEK SHARMA,MIZAN ABRAHA)

THANKING YOU….