Digital Speech Recorder Project (DSRP)

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Digital Speech Recorder Project (DSRP)

• Project by
• Electrical Engineers of Destiny 2006

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Members

• Brandon Trill Man Birgado
• Justin Bruce Lee
• Naoki Ichiban Sugito
• Matthew Beer Man Bales

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Outline

• Overview of Project
• Overall Project
• Specs
• Timeline
• Picaxe Implementation
• PCBExpress
• Problems/Solutions
• Future Improvements
• Finished Product

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Overview

• Project
• The project consists of a speech module device
  which allows for playback of messages. This
  module then is incorporated into different
  devices for those who need special education.
• Initial Challenge and Goals
• The initial challenge in this project Is to
  create a quality and cost-effective device that
  can be easily made for assisting school teachers
  and easily reproduced in learning situations by
  children and young adults.
• Our task is not only to create this device with
  the specs given, but also to implement it in a
  device that will benefit society as a whole.
• Our Focus
• The device is implemented easy to be made by
  children, cost-effective, and have the ability to
  use extra features that we do not require in this
  current design.

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Initial Goals

• Device created that can be implemented in aiding
  a child.
• Overall cost efficacy taken into account.
• Complete project within time frame.
• Implement project in a useable device.

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Final Circuit Specs

• 5 inputs
• 8 outputs
• Currently used for 4 button push board
• Circuit board design is designed to use or
  reproduce all the functions of the ISD1420 chip.
• Added Volume Control
• Added Functionality w/PCB Board

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Circuit Overview
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Cost Efficancy

• Total Circuitry Cost Range
• PCB Board - 20
• Chips Circuitry -20
• Current Cost - 40
• PCB can be cut down to 10
• Chips Circuitry can be cut down 12
• Total net cost would be around 22.
• Possibilities ChatBox clone - 60-120

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Its All About Timing

• Gantt Chart
• Time Management Problems

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Gantt Chart
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Time Management Conflicts

• Work
• Quit Work
• We need to be more available
• School Schedules
• Work on the project ideally
• Start strong, Finish early

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PICAXE

• Overview
• Programming
• Implementation

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What is the PICAXE?

• The PICAXE is a microcontroller that is low cost,
  easy to use and reuse.
• Cheap 8.10 Cant beat that
• Original intentions were for educational use, but
  its gone big time!!!
• Easily Programmed Re-programmed
• Put all that together and you get a rock solid
  stud-muffin microprocessor!!!!

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Our PICAXE

• The 18X PICAXE
• 5 inputs / 8 outputs
• Coding

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PC Board
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PC Board Design

• Double sided
• Cost efficient
• Small size
• First time designing

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Problems and Solutions

• Previously Solved
• Circuitry Problems (5V supply)
• Picaxe input file (infinite reset)
• Currently Unsolved
• Message Coherence with amplifier
• Radio Frequencies added with amplifier
• Circuit Protection

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Future Improvements

• Minimized PCBExpress board
• Expansive coding for picaxe w/ ISD chip
• Finalized 4-button record/play teaching tool
• Other interfacing options

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Project Demonstration
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THE END

• Thanks to Dr. Dobry and Viewers Like You
• Special Thanks to the Archimedes Team
• Team Website http//www2.hawaii.edu/mbales/index
  3.htm