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Final PresentationEE 396/496 Joint Project
May 9, 2006
Group Group MembersMembers
Krystina Tabangcura : Team CaptainTeam CaptainElectro-Physics Track | Previous Projects: [ 296 : Course
Scheduler ]
Paul Ramirez : Software Programmer / uC Software Programmer / uC ReceivingReceiving
Computers | Previous Projects: [ 296 : M & M Mighty Mouse ][ 396 : TBD ]
Melanie Locquiao : PCB Designer PCB Designer Systems | Previous Projects : [ 296 : All Access Unit ]
Allen Pascual : G. Designer / uC G. Designer / uC TransmitingTransmiting
Systems | Previous Projects: [ 296 : All Access Unit ]
Assistive Assistive TechnologyTechnology
Focus of Archimedes Hawaii Project: “Universal Design”
Any person with any disability being able to use any IT device (AT)
Archimedes Archimedes Hawaii &Hawaii &
Examples of Assistive Technology
OverviewOverview
Project Objective:“Design and develop a multi-channel, wireless
communication system for the purpose of modifying toys for children with disabilities”
Purpose:-To afford children with disabilities the same
opportunities -To provide a cheaper alternative to current options
-Allow anyone to be able to modify toys
Representation of Prototype (Push Button
Configuration) Final Result
Multi-Switch ToyEach switch on toy-end operated by a different
switch on user-end
OverviewOverview
System System DiagramDiagram
Picaxe Xbee RF Module
Xbee RF Module Picaxe
Input Switch 2
Input Switch 3
Input Switch
4
Relay
Relay
Relay
Relay
Input Switch 1
Toy Input 1
Toy Input 2
Toy Input 3
Toy Input 4
Switch Module
Toy Module
XBee OEM RF XBee OEM RF ModuleModuleTesting Testing
CommunicationCommunication
Switch EndToy End
Picaxe Picaxe MicrocontrollerMicrocontrollerTesting Testing
CommunicationCommunication
Picaxe 18X
Picaxe 18X
In0
Out7
In0
Out0
Out1
To 5VSupply
To 5VSupply
To 5VSupply
To 5VSupply
Receiving•Serial Input (Xbee -> uC)
•DC output (uC -> Output Transducer)
Transmitting•DC Input (Input Transducer -> uC)
•Serial Output (uC -> Xbee)
Switch Switch ModuleModule
Picaxe Xbee RF Module
Input Switch 2
Input Switch 3
Input Switch
4
Input Switch 1
Switch Module Schematic
LE333.3V Regulator
(100 mA)
5V
5V
3.3V
4.7uF 100nF+
100uF
180W
22kW
0V
10kW
4.7kW
Picaxe18X
TXD
RXV
Reset
0V Out 7
V+
1kW
10kW
Xbee
RXV
Reset0V
V+ Vref2
3
4
5
14
18
13 3
10
1 14
5
In 1
In 0
In 7
In 6
17
16
15
InputSwitches
78L055V Regulator
(100 mA)
100uF
Toy ModuleToy Module
Xbee RF Module Picaxe
Relay
Relay
Relay
Relay
Toy Input 1
Toy Input 2
Toy Input 3
Toy Input 4
Toy Module Schematic
LE333.3V Regulator
(100 mA)
5V
5V
3.3V
4.7uF100nF +
100uF
22kW
0V
10kW
4.7kW
Xbee
Reset 0V
V+VrefTXD
Picaxe18X
TXD
RXV
Reset
0V
V+In 7
Out 3
Out 4
Out 2
Out 6
Out 7
Out 5
Out 8
Out 1
TQ2-L-4.5V(Relay->Switch1)
TQ2-L-4.5V(Relay->Switch2)
TQ2-L-4.5V(Relay->Switch3)
TQ2-L-4.5V(Relay->Switch4)
78L055V Regulator
(100 mA)
100uF+
SerialDownload
Link
To toy switches
Final PCB Design
Toy Module PCBSwitch Module PCB
Resolved Resolved ProblemsProblems
PROBLEMS:
•Interaction between uController and RF Module
•Programming uController
•Ordering Parts online
•Finding right toy
•PCB express what?
•Holes on PCB were too small
•Not sticking to Gantt chart
Outstanding Outstanding Problems & Problems & SuggestionsSuggestions
PROBLEMS:
•Casing not to standards… (ghetto) Krystina… enough said
•PCB wasn’t PERFECT!!! Allen mixed up 2 cnxns for DL cable … need to fix if planning to mass produce
•Left Archimedes in a hurry last night so there’s a big mess there for us to clean
•Depletion region of (krystina’s) wallet increased exponentially from t = day 1 to t = now (Donations?//)
•Paul, Allen, Mel… I.O.U.’s
Future Improvement
s• Save money by etching PCB’s in house• Save money by buying all necessary supplies in the fewest
amount of orders to reduce shipping costs• Complete final designs before conducting tests
– Complete planning leads to faster product development and testing• Create smaller modules to fit in ball switch to be used by
Archimedes Hawaii• Add extra features:
– On and Off switch– Battery status (Full to empty)– Status Indicators
• Power• Transmitting/Receiving Signal Strength• Range• Switch
– “Switch Type” Mode• User manual
DemonstrationDemonstration
Please direct all attention to bright yellow object placed on the table.
WARNING!!!
Please be aware of your surroundings…
Enjoy!
QUESTIONs?
Visit the Wireless Xbee Visit the Wireless Xbee website at : website at :
http://www2.hawaii.edu/~allencha