Vinay Barde : Program Manager
Alexis Reusch: Program Facilitator
Jason Marks: Lead EE
Alfred Lee: Lead CE
Project Overview
• Seated balance to help physical therapist teach wheel chair
bound patients to improve the strength of their core muscles.
• Currently have a tower that is built that has seven large
panels in a vertical line that are separated by 3 tri-colored
LEDs.
• When activated the LED’s will be blue, if the patient touches
the target they will turn green and if they miss they will
become red.
• There are two games in the MCU : Random & Timed Trial
• Second tower will be added to the game to add more
challenges for the patients. This tower will be a slave to the
first tower and help to increase a patients side to side
reaching distance.
Scope & Deliverables
Scope:
Deliverables:
• Design and build the electrical
components of two towers so that
they may communicate wirelessly to
one another
• Two functional towers
• Perfect software that was developed
by team P10005 for the towers to add
in a second tower as well as more
games and components
• Wireless Communication between
towers
• Add a measuring device to the outside
of the tower so the therapist can
measure the distance between the
tower and the patient
• Upgrade current wiring in Tower #1
• Populate Tower #2
• Distance Sensor on each tower
Customer Needs
Engineering Specifications
Metric
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Need
Nos.
7,8
5
9
1,3,14
1,20
6
2,22,23
6,23
9
4,14
2
9,11
2,9,11
12
10,22
9,24
1,3,4,6,19
1,4,12
13
21
16
15
17, 18
Engineering Specifications
Metric
Time to sanitize
game response time
set up time ( movement of towers)
Proximity to activate panels
Number of game options (rounds, endurance, competition, duration)
Accuracy of measurement between person and tower
Functional reach measurement range
Functional reach measurement accuracy
Time to program games
Delays for wireless
Range of heights where proximity measurements can be taken
Size of box for the Ultra Sonic Ping sensor (Length and width)
Weight for entire system (per tower)
Wireless range (Maximum tower separation without the use of wires)
Range of Ping sensor
Time between maintenance (replace or recharge batteries)
Total number of games
Towers involved in games
LED indication to be ready to use
volume of audio ( indication of sucessful touch)
Size of LCD screen so that it fits in the tower (width )
LED Indication for which buttons are selected
Device will display results (hit, miss, average time, separate results per tower)
Imp
1
9
1
3
3
3
9
9
3
9
3
1
1
1
9
3
9
9
1
1
1
1
3
Units
sec
ms
mins
in
# complete
in
ft
in
minutes
ms
ft
in
lbs
ft
ft
min
# of games
# of towers
sec
db
in.
sec
boolean
Desired
Direction
down
down
down
down
up
down
up
down
down
down
target
down
down
up
up
down
up
up
down
target
down
down
yes
Marginal
Value
90
60
2
0.75
2
1
3
2
5
25
2
3
20
20
7
2
2
1
5
65-70
3.5
7
yes
Ideal
Value
60
40
1
0.25
4
0
5
0
2
10
5
3
15
40
15
1
3
2
3
50-60
4
5
yes
Metric
No.
1
2
3
Need
Nos.
7
7,8
7,8
Safety
Metric
Fillet of track corners
Optical Visibility ( % of lights seen by the client)
Cleanliness of the towers
Imp
3
3
3
Units
Degs
%
%
Desired
Direction
Down
up
Down
Marginal
Value
30
75
15
Ideal
Value
15
100
5
System Architecture
Capacitive Touch Chip Choice
Capacitive Chip Layout Schematic
Capacitive Chip Schematic
Distance Sensor Selection
Sensor Schematic
Wireless Communication between
Towers (Ez430-RF2500 )
Tower #2
(Slave)
Tower #1
(Master)
RF Communication
( Transmit/Receive)
User
Input
Ex430-RF2500
• Frequency @ 2.4 GHZ
• Communicates with
Evaluation boards
through I2C via
SimpliciTi protocol
Ez430-RF2500
• 16-MIPS performance
• 200-ksps 10-bit SAR ADC
• Two built-in operational
amplifiers
• Watchdog timer, 16-bit
Timer_A3 and Timer_B3
• USCI module supporting
UART/LIN, (2) SPI, I2C, or
IrDA
• Five low-power modes
drawing as little as 700 nA in
standby
• 2.4-GHz radio-frequency (RF) transceiver
• Programmable data rate up to 500 kbps
• Low current consumption
• USB debugging and programming interface featuring a driverless installation and
application backchannel
• 18 available development pins
• Highly integrated, ultra-low-power MSP430 MCU with 16-MHz
performance
RGB LED Schematic
LED Drive Circuit
MSP-EXP430F5438 Evaluation Board
MCU I/O Map Tower 1
MCU I/O Map Tower 2
UML Class Diagram
Balance Tower State Diagram
Sequence Diagram
Sequence Diagram
Sequence Diagram
Power Layout Schematic
Power Estimate
Component
MSP-EXP430F5438
LEDs
LCD
Capacitive Buttons
Wireless
Ultra Sound Ping Sensor
Case
Defintion
AVG
Max
Min Input Voltage (V)
2.2
2.5
4.7
2
1.8
5
Max Input Voltage
(V)
3.6
4
5.5
5.5
3.6
5
Avg Supply Current (mA)
1
20
5
5
18
30
Max Supply Current (mA)
2
25
15
10
22
35
Usage (mAh)
Usage (mWh)
Total Power (mW)
Battery Life (%)
Supply Current*Hours
Used
Supply Current*
Vout*Hours Used
Power Usage/Hours Used
598.000
840.667
1973.40
2774.20
493.35
693.55
Voltage Output (V)
Hours Used per day
3.3
4.00
Total hours of Life
(Battery PowerPower Used in
Minimum Battery
Hour/Battery Power in Hour
Req)/Total Power
3.43
111.13
4.82
79.05
Days
Total Hours/ Hours
Used per day
13.89
9.88
Note: Ping sensor calculations take into account the
brief time it will be active.
Battery
V
6
mAh
9600
mWh
57600
Minimum Battery requirement
5
462.37
2774.2
Only 6 LEDs are assumed to be on
Test Plan
Test 1: Subsystem/ Function/ Feature Name: Tower Setup
Date Completed: _________________
Performed By: __________________
Description: Test the time it will take to set up and perform maintenance on tower(s) for next
use.
Engr.
Spec. #
1
3
10
17
Engr.
Spec.
#
1
3
10
17
Specification (description)
Time to Sanitize
Set up Time
Time to program games
Time to change out the batteries
Unit of
Measure
Marginal
Value
sec
90
mins
2
mins
mins
2
2
Instrumentation or equipment (description)
Clorox disinfectant wipe, stop watch
Stop watch
Stop watch
Stop watch
Comments/Status
Test Plan
Test 2:
Subsystem/ Function/ Feature Name: PCB
Date Completed: _________________
Performed By: __________________
Description: Perform tests on PCB to verify correct operating conditions .
Engr.
Spec. #
Specification (description)
Unit of
Measure
Marginal
Value
-
Check voltage rails on PCB
V
5, 3.3
-
Check for physical damage
-
-
-
Check continuity
Ohms
Open
-
Cross check with schematics for
functionality
-
-
Engr.
Spec. #
-
Instrumentation or equipment (description)
Multimeter
Visual Inspection
Multimeter
Visual Inspection
Comments/Status
Test Plan
Test 3:
Subsystem/ Function/ Feature Name: Hardware Test of MCU Connections
Date Completed: _________________
Performed By: __________________
Description: Checking input/output lines from MCU for correctness.
Engr.
Spec. #
Specification (description)
Unit of
Measure
Marginal
Value
-
Check I2C lines
Check power lines
V
5, 3.3
-
Check LED lines
V
3.3
Engr.
Spec. #
-
Instrumentation or equipment (description)
Oscilloscope
Multimeter
Multimeter
Comments/Status
Test Plan
Test 4:Subsystem/ Function/ Feature Name: Software
Date Completed: _________________
Performed By: __________________
Description: Testing functionality of program, and interaction between peripherals and MCU.
Engr.
Spec. #
Specification (description)
2
Program functionality test
Game response time
4
Proximity to activate panels
Unit of
Measure
Marginal
Value
ms
works
60
in
2
ft
20
Delays for wireless
15
Wireless range (Maximum tower
separation without the use of wires)
20
LED indication to be ready to use
sec
5
23
LED Indication for which buttons are
selected
sec
7
Engr.
Spec. #
2
4
15
20
23
Instrumentation or equipment (description)
Computer
Stop watch
Tape measure
Tape measure, computer
Stop watch
Stop watch
Comments/Status
Test Plan
Test 5:
Subsystem/ Function/ Feature Name: Ping Sensor Setup
Date Completed: _________________
Performed By: __________________
Description: Test the functional reach test of the sensor for accuracy and distance. Use a piece of
black plastic with a bulls eye to test the reach of the laser. Observe the sensor can detect the
patient’s hand. Test should be completed 10 times.
Engr.
Spec. #
7
8
12
13
Engr.
Spec.
#
7
8
12
13
Specification (description)
Accuracy of measurement between
person and tower
Functional reach measurement range
Range of heights where proximity
measurements can be taken
Size of box for the Ultra Sonic Ping
sensor (Length and width)
Unit of
Measure
Marginal
Value
in
1
ft
3
ft
1.25
in
3
Instrumentation or equipment (description)
Tape measure
Tape measure, laser pointer
Tape measure
Tape measure
Comments/Status
Test Plan
Test 6:Subsystem/ Function/ Feature Name: Games
Date Completed: _________________
Performed By: __________________
Description: User will play the game and test it for game response, activation time, and if correct
operation
Engr.
Spec. #
2
4
5
9
19
Engr.
Spec.
#
2
4
5
9
19
Specification (description)
Game response time
Proximity to activate panels
Number of game options (rounds,
endurance, competition, duration)
Functional reach measurement
accuracy
Towers involved in games
Unit of
Measure
Marginal
Value
ms
in
#complet
e
60
2
in
2
sec
5
Instrumentation or equipment (description)
Stop watch
Tape measure
Count
Tape measure
Stop watch
2
Comments/Status
Test Plan
Test 7:
Subsystem/ Function/ Feature Name: Functionality of the Capacitive Chip
Date Completed: _________________
Performed By: __________________
Description: We will test to see what power we need for all outputs to work reliably. Power and
Clock will be applied to the chip. The voltage will and we will vary the sinusoidal signal to make
sure all eight outputs are functional.
Engr.
Spec. #
4
Engr.
Spec.
#
4
Specification (description)
Proximity to activate panels
Unit of
Measure
Marginal
Value
in
.75
Instrumentation or equipment (description)
Power supply, oscilloscope, function generator, Tape
Measure
Comments/Status
Project Plan
Responsible
Member
Start Date
Expected
Date
MSD II
Close Remaining Action Items from
PMR
Order rest of material needed for build
Group
3/12/2012
3/16/2012
Alexis
3/12/2012
3/16/2012
Software Code STUBS
Alfred
3/12/2012
3/16/2012
Jason, Vinay
Vinay, Alexis
Jason
Jason
Jason, Vinay,
Alexis
Jason, Vinay,
Alexis
Jason, Alexis
3/12/2012
3/16/2012
3/12/2012
3/16/2012
3/19/2012
3/19/2012
3/26/2012
4/9/2012
3/19/2012
3/26/2012
3/19/2012
3/26/2012
Wire Up both ping sensor boards
Vinay
3/19/2012
3/26/2012
LED portion of Code Complete
Alfred
3/19/2012
3/26/2012
Software Development
Initial main code for MCU ( Panels, LED,
LCD code) ie. One Button Code
System Code (Expanding One Button
Code)
Unit / Integration Tests for Touch panels,
LEDs, LCD) with Cap Chip/LED proto
baord
Alfred
3/12/2012
4/13/2012
Alfred
3/12/2012
3/30/2012
Alfred
3/30/2012
4/6/2012
Vinay, Alfred
3/26/2012
4/12/2012
Vinay
Alfred, Vinay,
Jason
Alfred
3/19/2012
3/26/2012
4/13/2012
4/23/2012
4/13/2012
4/23/2012
Alfred
4/20/2012
4/23/2012
Task
PCB Layout prep for sending
Cap touch Chip/LED prototype board
Send out PCB For Fabrication
Receive PCB and Begin Testing
Preliminary Builds
Wire Up Led Banks (all 16)
Ping Sensor Code
Integration of MCU code with sensor
and wireless
EZ430-RF2500 Wireless Code
Test Wireless
Date
Completed
Dependency
21
21
24
Comments
Component Testing
Group
3/26/2012
4/6/2012
Test PCB Functionality (Test plan #2)
Group
3/26/2012
3/30/2012
Test MCU Functionality (Test plan #3 )
Group
3/30/2012
4/6/2012
24
Group
Alexis, Vinay,
Jason
4/6/2012
4/23/2012
24,25,26
4/6/2012
4/9/2012
Jason, Alexis
4/9/2012
4/13/2012
Group
4/9/2012
4/23/2012
Group
Alexis, Vinay,
Jason
4/20/2012
4/27/2012
4/20/2012
4/23/2012
Jason, Alexis
4/23/2012
4/25/2012
Integration Testing ( Test Plan #4)
Group
4/25/2012
4/27/2012
Complete System Integration
Acceptence Testing (System functionality
Test # 6)
Project Planning
( Continuously through quarter)
Updated Risk Assessment
Group
4/27/2012
5/4/2012
Group
4/27/2012
5/4/2012
Group
3/16/2012
3/16/2012
Alexis
3/16/2012
5/18/2012
Update Project Plan
Vinay
3/16/2012
5/18/2012
Update Edge
Group
3/16/2012
5/18/2012
Poster
Group
5/4/2012
11-May
Final Paper
Group
5/11/2012
5/18/2012
User Manual
Group
5/10/2012
5/11/2012
Performance Review With Customer
Group
5/11/2012
5/11/2012
FINAL Project Management Review
Group
Tower 1 Build
Electronic Population
Machine Tower for Sensor box
attachment
Integration Testing ( Test Plan #4)
Tower 2 Build
Electronic Population
Machine Tower for Sensor box
attachment
23, 25
27,28,29
29
Effect
Cause
Importance
Risk Item
Severity
ID
Likelihood
Risks
Action to Minimize Risk
Owner
L*S
What action(s) will you take (and by when)
to prevent, reduce the impact of, or
transfer the risk of this occurring?
Who is
responsible for
following
through on
mitigation?
Going to see the faculty that is versed in
these areas as well as looking up sample
code on how to add these to the existing
code. Prioritize sections of code.
Group
Describe the risk briefly
What is the effect on any or
all of the project
deliverables if the cause
actually happens?
What are the possible
cause(s) of this risk?
1
Adding all of the new elements
into the code
This would cause our
project to not work
correctly and not meet the
customer needs
Team members coding
things they are not
familiar with
3
9
27
2
Arguments within team
Effect over all outcome
and time management
Teammates disagree
on decisions
3
3
9
3
Unable to finish product
design
Will lose total
completion time on
project
1
9
9
4
Customer feedback
Prevent optimal design
Different parts of
project plan not
completed on time
Inability to contact
customer
3
9
27
5
Current power not
sufficient for new parts
Affect budget, new
parts
Using new parts in
design
3
1
3
6
Scheduling conflicts
Effect over all outcome
of the project
Number of classes
everyone is taking
outside of MSD
3
3
9
Would affect customer
satisfaction
Some measuring
tools are more
reliable than others
we will need to do
plenty of research
before choosing
3
3
9
7
Reliability of measuring
tool
Everybody has a say, discuss
everything as a group. Learn to
compromise
Follow the project plan and
frequently keep up to date with
everybody’s work
Make multiple attempts to talk with
customer, email, call, etc.
Not a big risk, can be accounted for
buy increasing power with more
batteries etc.
We will set long term goals so that as
the deadline approaches we will
have time to ask another group
member for help if needed.
Test the part that we choose and
make sure that we have research to
support our choices
Group
Group
Alexis
Jason
Vinay, Alexis
Vinay
Risks
8
Part Availability
Would slow down
progress
Lead times
3
3
9
Plan ahead, find substitute parts
Alexis
9
Budget
Prevent completion of
project
Ineffective
budgeting/lack of
funding
1
3
3
Only purchase parts when 100% sure
they will be used
Alexis
10
Group member becomes
unavailable permanently
Loss of resource
Dropping
class/becomes ill
1
3
3
11
Loss of Towers
No longer have a
deliverable product
Stolen/Misplaced
1
3
3
12
Group member fails to
deliver critical component
Would slow down
progress
Preoccupied with
other classes
1
3
3
13
Products purchased are
insufficient for Design
Prevent accurate
modeling, and better
design
Insufficient research
before purchasing
3
9
27
Research needed parts, talk to
experts in area of need
Group
14
Wireless module delay
Slow down rate of
games
3
3
9
Know how to optimize wireless
communication device
Alfred, Vinay
15
PCB does not work
correctly
Bad design
3
9
27
Have team/prof review PCB layout
Jason
Wireless
communication not
fast enough
Would have to
redesign and reorder
Attempt to convince the member to
not drop the course. Major redesign
project plan may be needed
Major redesign project plan may be
needed/Reconstruct the tower.
Have midweek and full week progress
reports. This allows personal, and
team evaluation of progress, as well
as allowing others to assist if deemed
necessary.
Group
Group
Group
BOM
Bill of Materials
1
2
3
17
Quantity
Needed
754-1492-ND
$1.37
60
$82.20
-
$149.00
2
$298.00
All-Battery.com
8 Bay charger and 16 Batteries
$36.49
1
$36.49
SparkFun
COM-00526
$1.95
4
$7.80
-
$49.00
1
$49.00
Manufacturer
Manufacturer Part #
Distributor
Distributor Part #
RGB LED's
Kingbright
WP154A4SUREPBGVGAW
DigiKey
Microprocessor Board
Rechargeable Batteries and
Charger
Voltage Regulator (3.3v)
TI
MSP-EXP430F5438
-
Tenergy
-
4
EZ430-RF2500
TI
5
Ultra Sonic Ping Sensor
Parallex
6
MSP430 USB JTAG
TI
7
PCB
Advanced Circuits
8
EZ RF Header
Mill-Max
9
LCD Screen
Sparkfun
10
Transistors
Faichild Semiconductor
11
Panasonic
12 Surface Mount Resistors 4.7K
Panasonic
13 Surface Mount Resistors 820K
Surface Mount Resistor 56
Panasonic
14
15 Surface Mount Capacitors .1uF Murata Electronics
16
Unit Price
Part Name
Surface Mount Capacitors
10uF
Header
EZ430-RF2500
Total
Price
28015
DigiKey
28015-ND
$29.99
2
$59.98
MSP-FET430UIF
-
-
$99.00
1
$99.00
850-10-006-20-001000
GDM12864H
2N4401D75ZCT-ND
P4.7KGDCT-ND
P820KGCT-ND
P56GCT-ND
490-1524-1-ND
Advanced Circuits
ARROW
Sparkfun
Digikey
Digikey
DigiKey
DigiKey
DigiKey
GDM12864H
2N4401TAR
ERJ-3GEYJ472V
ERJ-3GEYJ820V
ERJ-3GEYJ560V
GRM188R71E10KA01D
$33.00
$1.14
$19.95
$0.21
$0.02
$0.01
$0.01
$0.03
3
$99.00
2
1
30
20
50
100
20
$2.28
$19.95
$6.30
$0.40
$0.46
$0.70
$0.52
TDK Corporation
445-6853-1-ND
DigiKey
C1608X5R1A106M
$0.46
TE Connectivity
A36395-ND
DigiKey
1-5164713-0
$1.28
10
35
$4.57
$44.88
Totals $811.53
Questions???