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Xbee Wireless Throttle Position Sensor  And Control
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Xbee Wireless Throttle Position Sensor And Control

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Circuit design and Xbee demonstration.

Circuit design and Xbee demonstration.

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  • 1. Xbee Wireless Throttle Position Sensor and Control
    Presenters: Miquel Moe and Eleanya Onuma
    Mentor: Professor Anderson
    Department of Electrical Engineering
  • 2. Agenda
    Introduction
    Equipment
    Procedure
    Results
    Conclusion
    Acknowledgements
  • 3. Introduction
    Our goals in this design:
    -Build a throttle position sensor prototype
    -Control the throttle of the throttle position sensor wirelessly
    -Implement a temperature sensor that will monitor the temperature of the throttle for safety
  • 4. Introduction
    What is a throttle?
    -Regulates the flow of fluid and/or air
    -This regulation is maintained by position of the flap
    What is a throttle position sensor?
    -Monitors the position of the throttle
    -Has an associated output (resistance, voltage…) with every position
  • 5. Throttle Position Sensor
    ADC 0804 IC chip
    0.1uf, 10uf and 147pf Capacitors
    10k Ω Potentiometer
    E3630A Agilent Triple Output Power Supply
    741 op amp
    Switch
    7 Segment Display
    Wires
    EPROM
    SN74LS47
  • 6. Procedure
    Design specification for the Throttle Position
    Sensor
  • 7. Vout
  • 8.
  • 9.
  • 10. Graph
  • 11. Microprocessor-Compatible 8-bit A/D Converter (ADC0804LCN)
    Vout from Diff op amp
  • 12. Test DAC input and output :
  • 13. ADC
    EPROM
    SN74LS47
    7- Segment Display
  • 14. Throttle Design and control
    10k potentiometer
    Cylindrical container(oatmeal box)
    Pen
    Epoxy
    Electric tape
    Wires
    5volts Unipolar Stepper motor
    Darlington transistor.
  • 15. Pictures of the Throttle
  • 16. Stepper motor
    A stepper motor as the name suggests is an electric motor that can divide a full rotation into a number of steps.
    Unlike the conventional DC motor that rotates whenever voltage is applied across the terminal, a stepper motor is controlled using a stepper motor controller or a microcontroller following a unique sequence.
  • 17. Unipolar stepper motor specification.
    35L048B1U-N
    Counter-clockwise Rotation
    Clockwise Rotation
  • 18. Arduino
    Arduino is an open-source electronic prototyping platform.
    The Atmega microcontroller on the board is programmed using Arduino Programming language which is based on C/C++
    We programmed the MCU to control our stepper motor using serial input sent through a Xbee radio
  • 19. Xbee(Zigbee)
    Xbee is a low power, wireless mesh networking standard.
    Mesh networking is a method of routing data between nodes in a network.
  • 20. Configuring the Xbee radios
    DATA
    Arduino A
    Xbee A
    Sender
    Xbee C
    Receiver
    Arduino C
    - -
    X-CTU software
    • Set baud rate for Xbee radios
    • 21. Upgrade firmware
    • 22. Test Range
  • Program the Arduino
    Arduino A
    Arduino C
    • Wire Circuit
  • Temperature Sensor
    Equipments
    10k Thermistor
    10kΩ Resistor
    LCD( Liquid Crystal Display)
    10uf capacitor
    Speaker
    Wires
  • 23. Thermal resistor also known as a thermistor is a resistor whose resistance vary with temperature.
    Steinhart-Hart equation is used to model the resistance on the thermistor at different temperatures.
    Where A, B C are Stienhart-Hart coefficient and vary by from type and model of thermistor
    T = Temperature in Kelvin
    R = Resistance in ohms at different Temperature
  • 24. Wire Up the Circuit
  • 25. Program the Arduino
    • Program the Arduino using the Steinhart-Hart Equation and Coefficients
    Arduino C
  • 26. System shut down
    Comparator – compares two voltages
    Buffer amplifier
  • 27. RESULTS
    • Temperature readings
    • 28. Throttle and throttle Position Sensor(degree error due to design)
    7.5˚
    5.5˚

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