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Talkie Board Project Review

Talkie Board Project Review. 2/19/2008 ARMS 1209. Introduction. Talkie Board. Project Leader: Sridhar Tamminayana, Soph. ME Pradnav Kachhwaha, Senior ECE Nitin Aswani, Senior ECE. Community Need. GLASS instructors often utilize communication aids when working with students.

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Talkie Board Project Review

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  1. Talkie BoardProject Review 2/19/2008 ARMS 1209

  2. Introduction Talkie Board • Project Leader: Sridhar Tamminayana, Soph. ME • Pradnav Kachhwaha, Senior ECE • Nitin Aswani, Senior ECE

  3. 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.

  4. Community Need • GLASS approached the team with a desire for an improved version of an existing product.

  5. 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

  6. 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.

  7. Deliverables: Talkie Board device. 15 customizable cards. User manual. Detailed construction instructions. Detailed maintenance requirements. Success Criteria This Project must allow for messages to be tied to cards, not locations, and cost at most, as much as currently used devices. Goals of the project

  8. Project Specifications

  9. Background Research • Current models of similar products allow for recording by card location only.

  10. Background Research

  11. Functional Decomposition • Card Identification: • Identify specific cards. • Identify when cards placed or removed. • Mode Selection: • Change between record/play, put on/take off, power on/off. • Sound System: • Record/play messages. • Access messages dynamically. • User Interface • Present cards in viewable manner. • Controls accessible to teacher, cards to student.

  12. pick up Select Activation Mode Pick up Card put down Play Message Play RemoveCard On/Off Switch Select Mode Record Select Card PressRecord Button Speak into base unit microphone Operational Overview

  13. Identification Sub-system Overview • Identify specific cards. • Identify when cards placed or removed • Requirements/selection criteria • Unique ID • Works in close proximity to other cards • Portable • Low power consumption • Maintenance • Inexpensive

  14. Proposed Solutions: Identification • RFID • Use RFID to detect a tag placed near by. • Each tag already has unique ID, no need to create one. • Inexpensive. • Barcode Scanner • Barcodes placed on cards and a scanner scans at each location. • Unique IDs, but would need 4 scanners greatly increasing cost.

  15. Proposed Solutions: Identification • Reed Relay/Switch • A magnet placed near a relay or switch activates circuit. • Magnets are inexpensive but, underlying circuitry may be impractical to implement. • Teeth • A unique pattern of grooves or teeth is arrayed along the bottom of each card and read with a laser. • This could possibly introduce more mechanical problems than initially anticipated.

  16. Proposed Solutions: Identification • Resistance • Each card would make a unique resistive contact to the base unit. • Can choose what ever resistance values desired that makes calculations easier. • Able to convert resistance to a voltage and compare values. • Easy to implement voltage comparators. • Resistors cheap and easily replaced.

  17. Proposed Solutions

  18. Selection Criteria • Practicality • Does solution make sense to implement? • Ease of use by user • Does technology negatively affect how product is learned and used?

  19. Decision Matrix

  20. Discussion of future plans • Specification Development and Conceptual Design phase is still ongoing. • Still left to design: • Mode Selection: • Change between record/play, put on/take off, power on/off. • Sound System: • Record/play messages. • Access messages dynamically. • User Interface • Present cards in viewable manner. • Controls accessible to teacher, cards to student.

  21. Discussion of future plans • Card Identification • Implementation of photo diode and using it to produce an address. • Do testing to find exact resistance values based on light exposure. • Specification Development and Conceptual Design phase to be completed for remaining sub-systems.

  22. Discussion of future plans • To be completed this semester: • Card ID. • User Interface.

  23. Questions?

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