PowerPoint PresentationSlide 2Problem StatementDesign Task BreakdownSlide 5Slide 6Slide 7Slide 8Slide 9Slide 10Slide 11Slide 12Slide 13Slide 14Signal Receiver CircuitTimelineSlide 17Slide 18I.K.E.Infrared Keyless EntryEE 4512 Senior Design Department of Electrical and Computer Engineering September 27, 2001Pre-Preliminary Design ReviewTeam MembersKenny Reynolds Dr. Ray Winton - AdvisorAdria D. Jones-Team Leader Ray SmithProblem StatementRadio Frequency Keyless Entry (RFKE) does not provide flexible interaction between automobiles and external communication devices.SolutionInfrared Keyless Entry (I.K.E.) will provide a flexible way of remote entry as well as allow communication with devices containing infrared IrDA compliant ports.Design Task BreakdownKenny Reynolds–Digital Signal Encoding / Decoding–Microcontroller InterfaceAdria Jones–Transmitter / Receiver Amplification & TransmissionRay Smith–IrDA ImplementationObjectives1. Functionality2. Unique Signal Keying3. Effective Range4. Power5. Packaging6. Durability7. CostKey ComponentsInfraredHandheld IrSignal TransmitterOptical SignalReceiverAmplificationDecodeMicro-ControllerSpecified FunctionBlock DiagramTransmitterIrDA PalmtopIR StandardReceiverLogicIrIrDAControlAutomobileTransmitterHT-640EncoderPIC16F84TransmitterCircuitryLEDSerial Encoding / Decoding IC’sHT-680 Serial Encoder4 Data Address Lines8 Address LinesHoltek HT-640 serial encoder and HT-648L decoder.Provide 10 data address linesand 8 control lines.(High, Low, Open)Built-in RC Oscillator allows for multiple transmissionfrequencies (~0.15 kHz to~2.6 kHz).Serial Encoding10 control lines, 8 data lines– Can be tied High, Low, or left open.– 3^18 =4484days possible serial combinations (12.3yr.).Example Coding from PIC (f = 100 kHz):A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 D1 D2 D3 D4 D5 D6 D7 D80 1 0 1 1 0 1 0 0 1 1 1 0 0 0 0 0 1 10 1 0 1 1 0 1 0 0 1 1 1 0 0 0 1 1 0 0Signal Transmitter CircuitIR LED'sSignal Transmitter CircuitReceiverReceiverCircuitryHT-648LDecoderIrDAEnc/decIrDATransceiverPIC16F84Interface toVehicle WiringHarnessS i g n a l R e c e i v e r C i r c u i tR833kR71MC14. 7nF1kR610kR4dD11nC3C4 22uR3 10kR2 4747R1C21ufR5 100k1+3-2V+4V-11L M324U2A1+3-2V+4V-11L M324U1A1+3-2V+4V-11LM324U4A+-12VV11kR9d D2R1110k1+3-2V+4V-11LM324U3A100kR10signa l _outputIR_input_hereI R S e n s o rSignal Receiver CircuitTimeline AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER Ordering Parts Hardware (transmitter/ Receiver) Programming PIC & Code-Debugging Designing & Fabricating PC Board & Performance Testing Placing components on PC Board Testing & Debugging Final Design PackagingChallenges Remaining1.Completion of Receiver Software2.Fabrication of Boards3.Performance Testing4.Troubleshooting5.PackagingTimelineTimelineFinal Documen-tationPCB FabricationTesting/ TweakingDAQ SoftwarePrototypeMayAprilMarchFebruaryJanuaryPreliminary Design ReviewFinal Design ReviewPreliminary Hardware ReviewI.K.E.Infrared Keyless EntryEE 4522 Senior Design Department of Electrical and Computer Engineering September 27, 2001Pre-Preliminary Design
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