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