Music Tuned Into Your Fingers

1
MIDI GLOVE

• Music Tuned Into Your Fingers
• April 5,2002

2
Goals of Project

• Create a glove that sends out signals based on
  finger position
• Use flex sensors, and an onboard MC
• Triangulate position of glove
• Use ultrasonics and Extended Kalman Filter
• Translate X,Y,Z position and finger position into
  MIDI signals
• Z-80 translates information into MIDI signals

3
Schematic Diagram
COMPARATOR
5 Flex Sensors (1 on each finger)
UHF Transmitter
RB0RB4
serial
PIC MC
Ultra-Sonic Transmitter
RA0
UHF Receiver
Ultra-Sonic Receivers
serial
Z-80
UART
D0-D7
INT
Stopwatch
NMI
INTA
serial
A0-A7
MIDI
D0-D7
CTC
Addressing
4
Flex Sensors Circuit
5
Addressing Circuit
6
Stopwatch Circuit
7
Software Flow Chart (Z-80)
State
Key
Scale
Initialization
Stop
C
GO
MJ
7-Segment Display Example
Menu
Stop
Loop Scan
Go
Key Press 2
Key Press 1
Set Key
Set Scale
Stop
Stop
Stop and Go is a flag that determines if MIDI
signals are sent
8
Software Flow Chart (NMISR)
NMISR Non-Maskable Interrupt Service Routine
Stop
Test Flag
Return
Go
From UART Finger Position
Generate MIDI Code
Send to UART
9
Software Flow Chart(IM1SR)
IM1SR Interrupt Mode 1 Service Routine
Go
Test Flag
Time Values From Ultrasonic
Stop
Calculate X Position
Return
Extended Kalman Filter
Generate MIDI if necessary
Send UART if necessary
10
Software Flow Chart (PIC)
PIC
PIC Interrupt Service Routine
Initialization
Button Press
Send Signal To Z-80
Send Ultrasonic
Sample flex sensor
Return
No Change
State Change
Change
Send signal To Z-80
11
Parts List

• Mattel Power Glove
• (5) Flex Sensors
• Ultrasonic Transmitter
• (3) Ultrasonic Receivers
• PIC 16F873 Microcontroller
• (3) LP339 Quad Comparators
• TX433 433.92MHz Transmitter
• RX433 433.92MHz Receiver
• Z-80 Microprocessor
• 16550D UART
• 8254 Counter Timer Circuit

12
Group Responsibilities

• Andrew Howard
• Integration
• Adesina Bakare
• MIDI Guru
• Robert Zaretsky
• Glove Hardware
• Robert Ferreira
• Software
• Ryan Ferster
• Triangulation

13
Current Status

• Circuits designed
• Triangulation equations derived
• Glove with flex sensors and ultrasonics acquired
• Other parts need to be ordered
• Software in planning stage
• Derivation of Extended Kalman Filter equations
  needed

14
Timeline for Project Phase

• April 11
• Acquisition and implementation of circuits.
• Start development of software.
• April 18
• Integration circuits with glove, ultrasonics and
  RF transmitter/receiver.
• Continued development of software
• April 25
• Period allowed for testing and troubleshooting.
• May 1
• Preparation for Demo.