Mobile Fidelity
Souhaibe Barkat
Tenzin Dhongyal
Michael Duckwitz
Matthew Syme
Patrick Wagner
Capstone Spring 2007
Description
What is it?
– Wireless high-fidelity music, voice, and data transmission
system.
What does it do?
–
–
–
–
–
–
Single base-station to multiple receivers
Color touch screen
Multiple audio inputs
Music Storage
Data transmission
Multiple Stations
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
High Level Concept & System
Diagram
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
User Interface
Receivers
Base-Station

Audio
Touch Screen
-Song Selection
-Audio Control
-Level Control

Audio Inputs
Control
Volume Control
Test Song Information
Possible Hand Held LCD Unit
-Microphone Jack
-Stereo Jack

Data Inputs
-SD Card Reader
-USB for PC Interface
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Base-Station Hardware Diagram
Encoder
A/D
Analog Input
“Stereo”
3.5 mm Jack
“48 KHz”
CD/Computer/
IPOD
SD Card
“FAT 16”
Tx/Rx
MCU
USB Input
SPI
l
ria
Se
Touch
Screen
User
Interface
“2.4 GHz”
SPI
20 “MHz”
Non Volatile
Memory
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Receiver Hardware Diagram
Non
Volatile
Memory
Tx/Rx
“2.4 GHz”
MCU
IIS
DAC.
SPI
SPI
SP
I
I
SP
BlueTooth
Tx
AMP
LCD
Parallel
BlueTooth
Rx
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Speakers
State Diagram
u
Inp
log
Ana
t
MP3
Encode
Alw
a
ys
Always
Init
SD Card Input
Idle
Transmit
Wait
Keyboard Input
Base Station
Always
Init
Select Channel
Base Station Search
Seach
Base
Station
Wait
Receive
Idle
Wait
Receiver
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Text Detected
Base Station Use Case
<<Include>>
Broadcast MP3 files
Get MP3 files from
SD card
<<Include>>
Get audio from
Analog source
<<Include>>
<<Include>>
Convert into MP3
<<Include>> Display on Touch Screen
Base Station
Operator
<<Include>>
Send Text message
<<Include>>
Get text message
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Receiver Use Case
<<Include>>
Play MP3 files
Select wireless channel
<<Include>>
<<Include>>
Control Volume
<<Include>>
Receiver
Operator
<<Include>>
Receive text message
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Display on LCD Screen
Preliminary Bill of Materials
KEY HARDWARE COMPONENTS
Part number
Manufacturer
Part Description
AT45DB642
Atmel
64-megabit 2.7-volt Only Dual-interface DataFlash® (FREE)
PCB-SDMMC
Sparkfun.com SD Card PCB Interface
RF-MiRF-v2-RPSMA Sparkfun.com 2.4 GHz RF Transceiver
TI
C6000 series DSP Development board
AT91SAM7A3
Atmel
AT91 ARM Thumb-based microcontroller (FREE)
ANT-24G-RP
Sparkfun.com 2.4 GHz RF Duck Antenna
AT89C51SND1
Atmel
8051 Microcontroller with MP3 Decoder and Human Interface (FREE)
Miscellaneous components (resistors, capacitors, connectors, etc.)
Custom PCB Designs (4 layer, 5"x6")
Qty Unit Price
1
$0.00
1 $14.95
1 $14.95
1 $200.00
1
$0.00
2
$6.95
1
$0.00
1 $40.00
6 $66.00
Amount
$0.00
$14.95
$14.95
$200.00
$0.00
$13.90
$0.00
$40.00
$396.00
TOTAL COST: $679.80
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Return on Investment
RETURN ON INVESTM ENT
Part Description
LABOR (20 hours/w eek @ $30/hour for 14 w eeks)
Labor - Matt
Labor - Souhaibe
Labor - Mike
Labor - Pat
Labor - Tenzin
Qty Unit Price
Multiplyer Amount
20
$30.00
14
20
$30.00
14
20
$30.00
14
20
$30.00
14
20
$30.00
14
Development Labor Subtotal:
Development Materials Subtotal:
DEVELOPMENT COST TOTAL:
$8,400.00
$8,400.00
$8,400.00
$8,400.00
$8,400.00
$42,000.00
$679.80
$42,679.80
1 BASE STATION (Raw cost)
MP3 Encoder
Transceiver
LCD Display/User interface
PCB Layout
Controller MCU
Miscellaneous Parts/Connectors
1
1
1
1
1
1
$12.00
1
$5.00
1
$15.00
1
$15.00
1
$7.00
1
$5.00
1
Base Station Subtotal:
$12.00
$5.00
$15.00
$15.00
$7.00
$5.00
$59.00
1 RECEIVER (Raw cost)
MP3 Decoder
Transceiver
PCB Layout
Miscellaneous Parts/Connectors
1
1
1
1
$9.00
1
$5.00
1
$10.00
1
$3.00
1
Receiver Subtotal:
$9.00
$5.00
$10.00
$3.00
$27.00
RETAIL Cost of Base Station & 1 Receiver:
Profit:
RETAIL Cost of 1 Receiver:
Profit:
Number of "Base Station & 1 Receiver" Units Sold to Offset Development Cost:
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
$150.00
$64.00
$50.00
$23.00
667
Division of Labor
Team members
Responsibility
Souhaibe Barkat
MP3 Decoder, PCB Design,
Documentation
Tenzin Dhongyal
User Interface, MP3 Encoder,
Documentation
Michael Duckwitz
MP3 Encoder, Transceivers,
Documentation
Matthew Syme
System Integration, Decoder,
Documentation
Patrick Wagner
Transceivers, User Interface,
Documentation
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Schedule
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Risks and Contingency Plans
1. Scheduling for Group Meetings
-Schedule Differences
2. Availability of Parts
-Good Availability Survey
-Early Ordering
-Modular Design
4.
DSP Constraints
- Price and Availability
- Acquire previous DSP Dev Board
- Implement DSP using a FPGA
5. Capstone induced Insanity
-SPRING BREAK!
-Buckets O’Water
-Beer
3. Complexity and Progression
-Meeting Low Goals as Priority
-‘Bolt – On’ Features increase
Complexity
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner
Questions?
S. Barkat, T. Dhongyal, M. Duckwitz,
M. Syme, P. Wagner