CSP 315Object locator

PNVR KoutilyaS.Rushikesh ReddyCh.vinay Reddy

Mvsk anirudhP Pradeep varma

M Laxman

Objective

• Finding lost objects : common problem for visually impaired

• Technological solution• Mobile application

Questionnaire• Gets frustated 5 to 6 times a day• Audio device better than vibration• Mobile app better than separate device

Mobile application

Tag1

Tag2

Tag3

Bluetooth communication

BLOCK DIAGRAM

Bluetooth module

Microcontroller

Buzzer Accelerometer

Rechargeable Battery

TAG

TAG

TAG:• Rfduino- Microcontroller with Bluetooth module• Buzzer(95dB)• Rechargeable battery(3V)• Accelerometer

Tag functioning• Any query from mobile app is received by

Bluetooth module and then sent to micro-controller

• Microcontroller processes the query and activates the buzzer accordingly

• Until the tag is searched for, it stays in the standby mode

Mobile App

RFDUINO• A finger-tip sized, Arduino compatible, wireless

enabled microcontroller• The RFduino is similar to the Arduino UNO or DUE,

except the RFduino has more power than the UNO, in addition has wireless smartphone connectivity built-in

• Adding wireless to an Arduino requires an additional wireless shield which adds size. The RFduino has wireless built-in, so there is no need for an additional wireless shield.

RFDUINO• The RFduino has a Nordic 32 bit ARM Cortex-M0

processor. It still runs the same, simple Arduino code the UNO runs also run on the RFduino.

• It has a wireless module incorporating Nordic’s nRF51822 SoC.

Rfduino is an open source!

Tag design Each tag contains an Rfduino

Costs Rs.1200 Contains unnecessary features

PCB design of our own Rfduino with required features

Phase1: implementation on breadboard (using DIP ICs)

Components: Atmega168 16MHz Crystal RF Module Basic circuitry elements

Circuit Diagram

Lockable Tags

• Contains accelerometer• When the tag is locked, any movement detected in

the accelerometer is sent to buzzer via microcontroller

Bluetooth module

Microcontroller

Buzzer Accelerometer

Rechargeable Battery

TAG

Future Scope• Lockable Tags• Reducing the cost of the tag• Tag shape:

We are trying to design the shape of the tag such that it can be attached to different devices

• Testing the app: We will get feedback from users and try to make our device

more user friendly

FINAL DEMO• Demonstration with tags based on RFDUINO

modules.• Design of low cost tag on a PCB board

Thank you