Stuart T. Duerson II James Holland

1
Final Presentation
Stuart T. Duerson II James Holland Asaf
Cohen David Abner
ECE 4006 Spring 2005 Dr. James
Hamblen
www.prism.gatech.edu/gt0914a/isis.html
2
The ISIS Groups Goals

• ISISs main goal was to create a keyboard that
  you could play without touching the keys
• Use Infrared light to detect users hand and
  distance for amplitude control
• Conform to the MIDI Standard
• Have 3 octaves
• Have the ability to teach a user how to use it
  dynamically
• Use a novel GUI interface

3
Success??

• The ISIS Group successfully
• Designed and fabricated a novel infrared-based
  touch free keyboard.
• Interfaces with any MIDI port to send and
  receive music messages.
• Developed a implemented a novel GUI interface
  was created to control ISIS using C.
• Uses 32 notes (4 shy of 3 octaves).
• Implemented amplitude control via distance
• Dynamically teach users how to play a given song

4
Movie Time

• Behold

5
Design Challenges and Solutions

• Ambient light (ISIS Enemy 1)
• Solved by Clocking IR and filtering
• Combining analog and digital systems
• Solved with 10 bit A\D converter and large
  number of MUXs and DEMUXs
• Erroneous reflections
• Solved by Demultiplexing the clock signal and
  multiplexing the output (creating a pair)
• Very large number of control signals and outputs
• Solved with Modular design and multiplexing
• Sending AND receiving MIDI messages
• Solved by Carefully programming the PIC to queue
  incoming messages while continuing normal
  operation
• Massive fabrication effort
• Solved with Ridiculous hours in the design lab

6
ISIS Data Control Lines

• MIDI Device sends and receives MIDI music
  messages
• PIC Microcontroller receives input from the MIDI
  device and the keys through ASBs additionally
  the PIC sends messages to the MIDI device and the
  keys
• The ASBs communicate with both the PIC and the
  OSBs (individual keys)
• User interacts with the OSBs to play notes and
  learn how to play various songs

7
OSB Optical SkillZ Block
8
ASB Analog SkillZ Block
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ASB Output
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PIC Microcontroller
Main Line Code

• call input
• call sampleAD
• call sendMIDI
• incf COUNT,F
• movlw 36
• xorwf COUNT,W
• IF_ .Z.
• MOVLF 0,COUNT
• call BlinkAlive
• call lightLEDs
• ENDIF_

11
ISIS LEDs Christmas

• 2 shift registers for each ASB.
• Loads data for each color of LED from a signal
  data line.
• Clocking is what distinguishes between each ASB
  LEDs.

12
MIDI Interface GUI

• Plays standard MIDI files, can select
  input/output ports. Uses hardware MIDI
  synthesizer.
• Shows which notes a user is playing.
• Two Modes Beginner and Advanced

13
Complete ISIS Package
14
ISIS Cost
15
Future Work and Closing Thoughts

• Independent Power Supply
• Wireless Operation
• Beginner Mode
• More Notes with Smaller Footprint
• Larger Distance from better Optoelectronics
  (VCSEL)

The ISIS group thanks you for your time and
attention. Following this short clip we will
host your questions.