Appliance Texter

Mid Semester PresentationSenior Design IIOctober 5, 2010

Appliance Texter TeamCasey Cook - CPE PIC24 Coding, current sensor

Perriea Wiley - EE PCB Design, Enclosure

Steven Howell - EECurrent Sensor

Steven Cullen - CPE PCB Design, Enclosure

Dr. Raymond Winton

OutlineIntroductionProblem StatementSolutionConstraintsTechnical Design ConstraintsPractical Design ConstraintsProgress and RefinementsFuture PlansTesting PlanReferences

ProblemThe average user is concerned with leaving home without safely turning off all of their appliances. This can cause anxiety, stress, or home damages in the case of appliances that do not need to be left unattended for extended periods of time.SolutionAppliance Texter allows consumers the ability to remotely monitor and control the state of their home appliances.Wireless Monitor via (SMS)request on/off state of the appliance through a text messageWireless Controls via (SMS)Turn the appliance on or off with another text message

Project ConstraintsTechnical

Practical

Technical Constraints

Practical Constraints

Manufacturability - SizeAppealUsers dont want a bulky product.

CompatibilityMust fit the NEMA 5 standard

[1][2]Social Simple:

Many Service ProvidersLarge Coverage Area

[3]Social-Simple cont.Easy SetupPlug it inInsert SIM cardTextUser FriendlyMajority of population knows how to text

[4][5]System OverviewMicrocontrollerPower SupplyRelayApplianceGSM ModuleSourceCurrent SensorProgress and Refinement

[6]

Development of the working prototype from Design ICurrent SensorProposed upgrade of current sensor to surface mountComplicationsMeasuring IssuesTimeliness/DeadlinesAlternate Options

Microcontroller PICUpgrade to surface mountBenefitsSpacePracticality

SIM CardPush/Push SIM card connectorAccessibilityConvenience

PackagingPackaging optionsBox StylePCB behind all of the componentsSide by Side StylePCB and Power Supply on the side of the PackageHalf and HalfHalf of packaging PCB, Half power supplyPCB DesignCurrent ProgressFootprints and accessory parts laidCurrent Sensor

SchematicPCB layout

Sub-System TweakingUpgraded BJTs used to control relayAlterations to microprocessor code to delete messagesAlteration to code to text the user if the relay appears to be malfunctioningChanges to the current sensorAdded a capacitor to the voltage rail

Future Plans[7]

23Enclosure for the device

System TestingUpon completion of PCB, testing of soldered components will occurOverall Unit tests for the system in the boxTesting will be for functionality

References[1] Razor Book Online Available 2010 [Online] Available: http://www.biztoolbelt.com/uploads/razorbook-400-mini-laptop-thumb.jpg[2] Text Messaging, 2010 [Online] Available: http://www.brad.ac.uk/img/2004/Text%20Messaging%202.jpg[3] Roaming Coverage Chart, 2009 [Online] Available: http://www.gsmworld.com/roaming/GSM_AmericasPoster2009A.pdf[4] Text, 2010 [Online] Available: http://ronpai2.files.wordpress.com/2009/01/text-messaging.jpg[5] AT&T wireless provider 2010, [Online] Available: http://www.att.com[6][7] RLV Cacher 2010 [Online] Available: http://rlv.zcache.com/making_progress_tshirt-p2354762393691928994vsp_400.jpg

Questions?Questions?

Questions?Questions?