Transcript presentation

Drum Tutor Lite
ECE 445 Senior Project
Group 43
December 3,2015
Yuanheng Yan
Xun Yu
Zhen Qin
Abstract
Overview
Parts breakdown
Requirement and
verification (R&V)
Future development
Introduction and objective
Interactive graphical
interface
Game-like user
experience
Battery powered
Portable design
Modular sensor design
Plug and play
Adaptive to multiple
surfaces
Demo video


The video exceeds the upload limit
Link:
https://www.youtube.com/embed/n1Pf7Q9wtoA
System Overview
Changes

SD card mount



File storage moved to computer
Local storage no longer needed
Power



Cheaper
Easier implementation
Enough battery life
The Tutor
Sensor
Powered by 9V
battery
Serial Port
Sensor Envelope
Sensor Input Ports
Voltage Regulator
Microcontroller





Programmable processor
Serial Communication
with PC
ADC onboard convert
analog signal to digital
signal
Support 6 sensors
Integrated power circuit
Microcontroller Schematic
Sensor Envelope Unit




Modular design
Multiple units for
multiple surfaces
Powered by 9V battery
Unity gain buffer
Sensor Schematic



RC envelope circuit
Resistors in parallel with sensor input to discharge
sensor capacitor
Unity gain buffer with 9V to 0V rail voltage only
positive voltage for simple processing
Software
Converter





Programmable processor
Serial Communication
with PC
ADC onboard convert
analog signal to digital
signal
Support 6 sensors
Integrated power circuit
R&V – Power Supply (Voltage)


Vmax: 4.962V
Vmin: 4.855V
R&V – Power Supply (Current)


Current: 59.0645 mA
Battery life rating:
600mAh/59.0645mA
= 10.16h (Estimate)
R&V – Sensor circuit


Yellow line is
output signal
and green
line is raw
input signal
Sensor
circuit
envelope the
input signal
R&V – Microcontroller




Purple part is the
input from ADC
Highlighted peaks
are output of
microcontroller
Top diagram shows
the peak detection
on a drum
Bottom diagram
shows the peak
detection on a box
Drum
Box
R&V – Interface




Blue box:
cue (Read
from file)
White box:
hitbox
Green circle:
correct hit
Red circle:
incorrect hit
Room for improvement

MIDI conversion


Standalone function and can be achieved by external
programs
LED feedback


Microcontroller only has 1 serial port for data transmission
Microcontroller with multiple serial ports needed
Future Developments





Adjust sensor envelope amplitude for
different surface with potentiometer.
Use standalone ADC for faster and more
accurate sampling
Add Bluetooth module for better portability
Use voltage regulator with higher efficiency
Use delicate enclosures for better durability