1 Feb 19, 2008 ARMS 1209 Talkie Board Design Review.

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Feb 19, 2008

ARMS 1209

Talkie Board Design Review

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Talkie Board

Introduction Project Leader

Ross Howard – Sophomore, ECE Project Member

Matt Miner – Junior, ECE Amir Soofi – Junior, ECE

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Talkie Board

Project History Origins of project

Talkie Board began in Fall 2005

GLASS approached the team with a desire for an improved version of Take n’ Talk

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Talkie Board

Community Need GLASS instructors often

utilize communication aids when working with students. Cards representing different

words are given by the student to the instructor to communicate.

Take n’ Talk allows for 4 messages to be stored and are tied to specific locations.

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Talkie Board

Community Need Take n’ Talk records sounds to locations, not

objects, which can lead to misunderstandings Addressing the need will:

Allow GLASS instructors to communicate more effectively with students

Increase the abilities of GLASS students, allowing them to live more fulfilling lives

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Talkie Board

Goals of the Project Talkie Board will provide a customizable

communication aid that will allow students to communicate through the use of pictorial representations, not specific locations

Talkie Board will not help students to physically speak on their own, but will provide a means to communicate through pre-recorded messages

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Talkie Board

Goals of the project Success Criteria:

This project must allow for messages to be tied to cards, not locations, and cost at most as much as currently used device

Deliverables: Talkie Board device 15 customizable cards User manual Detailed construction plans Detailed maintenance requirements

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Talkie Board

Project SpecificationsRequirement: Specification:Ability to record sounds Hold 15 pre-recorded sounds

Sound Access Access to sounds based on card, not location

Volume Control volume level

Different modes Be able to change between record/play and between pickup/takeoff of cards

Power Control Ability to turn on/off

Multiple message accessibility Allow up to 4 messages to be available for use

Ability to record sounds Hold 15 pre-recorded sounds

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Talkie Board

Project SpecificationsRequirement: Specification:Activation Ability to activate the device

once in desired mode

Weight < 5 lbs.

Size < 6in x 6in x 12in

Cost < $200

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Talkie Board

Functional Decomposition Card Identification:

Identify specific cards Identify when cards placed or removed

User Interface Present cards in viewable manner Controls accessible to teacher, cards to student

Mode Selection: Change between record/play, put on/take off, power on/off

Sound System: Record/play messages Access messages dynamically

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Talkie Board

Systems OverviewTlkie Board

Optical Card Reader

Micro-controller

Sound Chip

Microphone

SpeakerMode

Selection

Card Bay 1 Card Bay 2 Card Bay 3 Card Bay 4

Bay Switches

Memory AddressCircuitry

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Talkie Board

Design Overview The device will work by accessing prerecorded

messages based on card placed on device Each card will have a 4 bit number to access specific

memory address 4 bit number will be read using optical sensor Recorded messages will be related to number, not to

position

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Talkie BoardStudent User Interaction

Clear Material Photocell

Base

*Only one of four sections shown

Changeable card

Microswitch

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Talkie Board

Operational Overview

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Talkie Board

Design Overview Topics Card Identification

Detailed Design and Development

User Interface Specification Development

Mode Selection Conceptual Design

Sound System Conceptual Design

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Talkie Board

Design Overview: Card Identification LED Array

Bay 1

LED ArrayBay 2

LED ArrayBay 3

LED ArrayBay 4

Photosensor Array Bay 1

Photosensor Array Bay 2

Photosensor Array Bay 3

Photosensor Array Bay 4

Card 1

Card 2

Card 3

Card 4

Switch 1

Switch 2

Switch 3

Switch 4

Memory Address Circuitry

Microcontroller

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Talkie Board

Design Overview: Card Identification

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Talkie Board

Design Overview: Card Identification

Requirement Specification Solution

Sound Access Access to sounds based on card, not location

4 bit card identification read through optical sensors

Different modes Be able to change between record/play and between pickup/takeoff of cards

Switches determine when card placed or picked up off

Multiple message accessibility

Allow up to 4 messages to be available for use

4 trays for cards available and monitored using switches and optics

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Talkie Board

Design Overview: User Interface This includes the casing

that houses all the electrical components, the front panel on which the cards rest and the cards. This also includes the four buttons the teacher user is responsible for operating

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Talkie Board

Design Overview: User Interface

Requirement Specification Solution A

(Design Winner)

Solution B Solution C

Weight < 5 lbs. Wood Construction – 4.87 lbs.

Aluminum Construction

– 5.22lbs

Plexiglas Construction –

6.02lbs

Size < 6in x 6in x 12in

Wood Construction

–

5in x 6in x 12in

Aluminum Construction

–

5in x 6in x 11.5in

Plexiglas Construction

–

5in x 6in x 12in

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Talkie BoardDesign Overview: Mode Selection

Record/Play

Place/Take Away

On/Off

Record Enable

Microcontroller Sound Chip

Mode Selection

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Talkie BoardDesign Overview: Mode Selection

Requirement Specification Proposed Solution A

Proposed Solution B

Different modes Be able to change between record/play and between pickup/takeoff

of cards

Toggle switches used to select

between different modes

Push button used to select different

modes

Power Control Ability to turn on/off Toggle switch used for on/off

Push button used for on/off

Activation Ability to activate the device once in desired

mode

Record enable button for

activating once in record mode

Record enable button for

activating once in record mode

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Talkie BoardDesign Overview: Mode Selection

Requirement Specification Toggle Switch Push Button

Different modes Be able to change between record/play

and between pickup/takeoff of

cards

x x

Power Control Ability to turn on/off x x

Activation Ability to activate the device once in desired mode

x

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Talkie BoardDesign Overview: Sound System

The soundchip is the part of the circuit that stores and plays the message. The inputs are the addresses from the card

identification and the three bits that control the soundchip operations.

The only output the soundchip has is the audible recorded message.

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Talkie BoardDesign Overview: Sound SystemRequirement Specification

Ability to Record Sounds Hold 15 pre-recorded sounds, up to 7 seconds in length

Sound Access Access to sounds based on card, not location

Different Modes Be able to change between record/play and between pickup/takeoff of cards

Multiple Message Accessibility Allow up to 4 messages to be available for use

Record Length Recorded message length should be no longer than what is spoken

Play Length Play time should only be length of message

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Talkie Board

Design Overview: Sound System

Sound Chip Speaker

Microphone

Microcontroller

Memory AddressCircuitry

Mode Selection

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Talkie Board

Design Overview: Sound System

Proposed Solutions Sound chip that includes following features

onboard memory for storing audio can both record and play messages only plays message, then disables sound output

Decoder with EEPROM Audio files are stored in addresses in the EEPROM Decoder will access memory locations and retrieve data

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Talkie Board

Preliminary Budget  amount indv price  

Soundchips 2 $12.00 $24.00

Microphone 1 $10.00 $10.00

Speaker 1 $20.00 $20.00

Sensors 20 $3.00 $60.00

Casing 1 $20.00 $20.00

Circuitry supplies 1 $20.00 $20.00

Card material 1 $10.00 $10.00

Operational buttons 3 $3.00 $9.00

Battery 1 $20.00 $20.00

    TOTAL $193.00

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Talkie Board

Future Plans Card Identification

Finalize Detailed Design Prototype Development

User Interface Finalize Detailed Design Prototype Development

Microcontroler/Logic Specification Development Preliminary Detailed Design

Sound System Specification Development Preliminary Detailed Design

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Talkie Board

Future Plans Projected Deliver Time

Fall 2009

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Talkie Board

Questions?