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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?
