Electronic Guidance Device(EGD)PurposeObjectivesBasic OperationBasic Operation(continued)Project Block DiagramHardware and device listPIC microcontrollerElectronic CompassThe Range finderVoice ChipPossible extensions and other practical applicationsSchedule and the Division of laborAreas Of RiskContingency PlanComments/Questions?Electronic Guidance Device(EGD)Group MembersStephen HarrisAbdul-Karim Al-ShanfariBradley SmethieRobert BornhijmPurposeTo design a navigational aid for the blind and vision impaired.ObjectivesTo integrate with existing guidance cane.To provide information through audible feedback to user about fore lying object or sharp elevation changes.Geographical direction is to be provided at the user’s discretion.Basic OperationBasic Operation(continued)Project Block DiagramHardware and device listMicrocontroller Flash memory on boardRAMSpeech chipElectronic CompassUltrasonic DevicesBatteryHeadphonesVolume controlPIC microcontroller40-pin DIPFlash memory(14336 bytes)256 bytes EEPROM data memory33 I/O pinsReduced instruction set (35)16-bit timersElectronic Compass2 degrees accuracy.Pin selectable Binary Coded Decimal (BCD) or binary output format.Power supply 5V @ 10mA .5Hz sampling rate .The Range finderRange: 6 inches to 35 feet.Multiple measurements capability.Operating temperature 0c to 40c.Voice Chip28 Pin Dual-in-line Package(DIP)+5V supply voltage120 second duration recordingPlayback can be edge-triggered or level activatedRuns directly to 16 Ohm speaker/headphonePossible extensions and other practical applicationsA vibrating feedback for hearing impaired, and as a silent alternative for the user.Audio feedback providing the user with the time of day.RF receiver/transmitter to alert others of presence of vision impaired persons.oCommunication with vehiclesoPublic building stair wellsoAbility to send emergency signalSchedule and the Division of laborAreas Of RiskInexperienced with embedded systemsIncorrect chips; chips won’t do what we want them to doTime constraintsRangefinders don’t work <32 F. Won’t be able to test outside in winter time.Contingency PlanSpend more time learning embedded systems.Trying out the 8051 if we can’t get PICmicro chips to work.Test inside if it is too cold
View Full Document
Unlocking...