Get%20Up%20Stand%20Up%20GuSu

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Get Up Stand UpGuSu
Group 5 Summer 09

• Andrew Leger
• Joshua Rust
• Matthew OMorrow
• Philip Bell

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Problem

• Cant always wake up on time
• Most alarms are more annoying than waking
• Almost all alarms allow the user to go back to bed

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Solution

• Wake the user on time
• Wake the user gently
• Flexible and robust alarm clock allowing many
  options in both timing and method of waking the
  user
• Make sure the user is awake
• Detect users presence in bed and do not allow
  snooze or off option during their waking time

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Objectives

• Timing
• Internal clock
• Flexibility
• Full user control over what and when
• Seven day alarm time programmability
• Options
• FM tuner integration
• MP3 audio integration via USB media slot
• Tone buzzers
• User detection
• Sensing system for detecting when user is in bed

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Objectives

• For the alarm time span set by the user, if they
  are detected by the sensor system, the alarm
  performs user chosen actions and silences itself
  anytime there is no user detected
• The appliance module will use local on/off
  control and is remotely controllable by the alarm
  clock
• The alarm clock has a battery backup to prevent
  both clock time loss due to power outage and
  snoozing by unplugging
• Power usage is designed around efficiency

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Specifications

• System does not exceed 12L x 9W x 5H
• It displays time and date in U.S. standard format
  (HHMM) using OLED screen
• Battery backup lasts through 8 hours
• (4 hours is an average power outage)
• Pressure sensors have 12 feet of wire for
  flexible placement
• Wireless integration has a minimum range of 100
  feet

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System Overview
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External Enclosure
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Case Design
Chosen material Wood Top Pushbuttons Front
OLED and Speaker Back Power cable, and USB media
slot Side FM tuning knob
842 AM MP3 Coffee 620 AM
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Microcontroller
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Microcontroller Requirements

• Handles all communication and control between
  external devices
• Must support USART, SPI, and I2C, ADC
• Five push buttons, XBee, MP3 decoder, FM Tuner,
  USB thumb drive
• Enough memory for system logic and device
  interfacing
• Low power

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ATmega644P Specifications

• The ATmega644P is a 40 pin Advanced RISC
  Architecture microprocessor
• 64 KB Flash memory
• 20 MIPS at 20 MHz
• 8 bit ADC
• Two UART ports
• SPI ports
• I2C port
• Adequate amount of digital I/O
• pins for possible expansion of
• functionality

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Alarm Implementation
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Block Diagram
Audio Amplifier
FM Tuner
Speaker
External Audio Jack
Microcontroller
Buzzer
MP3 Decoder

• FM Tuner and Buzzers are powered on through the
  microcontroller only when in use.
• The MP3 audio is sent to an audio jack for
  external speakers.
• A common LM1458 Op-Amp is used to amplify the FM
  audio before passing it to the internal speaker,
  and is controlled with an analog potentiometer.

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Buzzers

• Two buzzers are used, the CPE-503 and the WST-
  1205S
• The WST-1205S is turned on using 5V and has a set
  output of about 85dB, which is the softer buzzer.
• The CPE-503 has an audio output of 95dB, and is
  also controlled with a 5V line from the
  microcontroller. 95 dB is the loudest noise that
  should be used without the risk of causing
  hearing damage over extended periods of time.

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FM Tuner

• TDA7000 chip chosen for easy implementation on a
  PCB
• Tuning is voltage controlled, which is changed
  via a variable inductor and potentiometer, which
  is part of the housing and connect to the PCB
  with leads for user tuning

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USB Flash Drive Reader

• USB Flash Drive is used to play MP3 files using
  the FAT16 file system on the VMusic2 module
• Socket will be externally accessible
• Interface to the microcontroller is Serial uART

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MP3 Decoder

• VS1003 chip used to decode data from USB Host
  Controller via SPI interface, subsequently
  sending data to microcontroller and then to
  speaker output
• The data request pin is set high when the VS1003
  is capable of receiving data
• Plays different audio formats MP3, WMA, and MIDI
• It can determine sampling frequency up to 48 KHz
  and MP3 input rate of 320Kbit/sec, again
  simplifying implementation work required

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User Interface
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Physical user interface

• Five pushbuttons
• Up, Down, Left, Right, Center
• Used to navigate menus during setting

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OLED Display

• uOLED-160-G1 (Organic Light Emitting Diode)
• Resolution 160x128 pixels with 256/65K true
  color. Width 1.81 in, Height 1.26 in
• Chosen for 5 pin UART interface and full
  graphical display ability

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Graphical user interface
Running Display
Setting Display

• What options can be changed under current menu
• Current setting
• Highlight current selected setting for
  changing

• Current time
• Day of the week
• Next alarm time
• Selected action and their order

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Sensor system
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Sensor system

• Hypothetical Implementation

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FAILED!!!
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Pulsor Pressure Sensor

• Pulsor is a motion / presence detection device
  that responds to the physical flexing of the
  material on which it is mounted.
• The flexing of the material varies the resistance
  of the sensor connected as R2 in a voltage
  divider network
• The voltage is measure in an ADC converter to
  determine if the user is in the bed.

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Wireless Integration
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Wireless Integration
The appliance module is capable of controlling
any appliance with a max of 20 amps. It has a
indicator light for current status and a push
button for local status control. The user can
also choose to enable the appliance module start
time with alarm time.
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Xbee Series 2 Module

• Complete System on Chip module
• Provides wireless serial interface
• Zigbee Compliant
• AES 128 Bit encryption
• Out of the box solution for enabling wireless
  communication between devices

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Clock
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Real Time Clock- DS-1307

• Using an external clock will prevent timing
  issues in program execution.
• Communicates with microcontroller over I2C
  interface
• Stores HHMMSS and DD/MM/YYYY
• Highly accurate with support for daylight
  savings and leap years

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Power Supply
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Power Supply
Battery Back-up
5V Voltage Regulator
AC Wall Outlet
3.3V Step-Down
Zigbee
Microcontroller
12V Wall Wart
FM Tuner
Buzzers
Op-Amp
OLED Screen
Clock/Timer
-12V Line
Pressure Sensor
USB/MP3

• A 5V and 3.3V DC power supply is required. Also,
  12V and -12V is required to bias the Op-Amp
• A Power LED and battery replacement LED indicate
  status

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Device Requirements
Device Voltage Req. (DC) Current Req. (Active)
Microcontroller 2V 5V lt10 mA
FM Tuner 4.5V 5V 8mA
OLED Screen 4V 6V 10-115 mA (typ. 40)
Pressure Sensor 3V 5V lt100uA
Buzzers 4V 6V 30 mA
VMusic2 4V 6V lt90 mA
Clock/Timer 2V 5.5V 2 mA
ZIGBEE 2.1V 3.6V 40 mA
Op-Amp 12V and -12V 5 mA
Totals 2.4-3.6, 4-5, -12, 12 260 mA max
Main power supply is a wall wart that provides
12V DC, and allows for 1A of current
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Backup Battery

• 8 AA batteries in series serve as the backup
  battery
• These provide the most cost-efficient
  implementation, and are easily replaceable for
  the user
• AA batteries store roughly 2800 mAh of charge,
  and during testing, supplied over 20 hours of
  power to the device.

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Schematics
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1

• A common 12V wall wart is used to provide the
  power
• The backup battery (12V) only activates when
  there are power outages, and the LED will only
  turn on if the battery is failing
• LM7805 voltage regulator is used as step-down,
  with an LED for visible confirmation of power
  on
• LM11171 voltage regulator is used to step the 5V
  line down to 3.3V for the Zigbee
• The Op-Amp is biased with the 12V source and a
  -12V line from a DC/DC converter (NKA1212SC from
  Murata Power Solutions)

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4
5
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Software
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Software

• Creation
• Software Engineers
• Josh Rust
• Philip Bell
• Programming Languages
• Arduino/C
• Development Environment
• Arduino 0016

• Design
• Control all devices and hardware connected to
  microcontroller
• Be complex enough to simplify user controls and
  implement the planned graphical user interface
• Total code size must not exceed 64KB
• Available RAM is only 2 KB

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Software

• Implementation
• Global variables for all user settings
• Two Main functions RunMode and SetMode invoke
  all other functions and decide behavior based on
  user interaction

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Printed Circuit Board

• Current Finalized Design
• Filled Ground plane
• Created with ExpressPCB in conjunction with
  ExpressSCH

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Project Budget
Components Total Cost
uOLED-160-G1 Display 159.98 (2)
Atmel ATmega644-20PU 7.87 (1)
Sanguino Dev Kit 25.00 (1)
Xbee Modules 46.00 (2)
Atmel ATmega168 4.00 (1)
Housing/Case Supplies 25.00 (1)
MP3/USB reader 58.00 (2)
DS1307 Clock Timer 5.06 (1)
TDA7000 FM Tuner 7.00 (1)
PressureSensor 29.00 (2)
Directional Infrared Sensor 3.80 (2)
Fresnel Lens 1.75 (5)
PIR Sensor Module 7.40 (1)
SD Card and socket 22.95 (1)
Logitech Speakers 30.00 (1)
Components Total Cost
Infrared Induction Control 2.70 (3)
Amtel ATmega168 10.00 (2)
LP8072 PIR Sensor 1.80 (3)
M7612 PIR Controller 2.70 (3)
STA013 MP3 Decoder 13.80 (2)
28 Pin SOIC Adapater 1.60 (2)
LM7805 5V Regulator 0.51 (1)
DE-SWADJ 3.3V Regulator 15.00 (1)
WST-1205S Buzzer 1.81 (1)
LM1458 Op-Amp 0.50 (1)
EAS-4P15SA Speaker 4.32 (1)
TS5A23159DGSR MUX 0.81 (1)
Printed Circuit Board 105.00 (2)
Miscellaneous 50.00 (1)
Total 643.36
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Project milestones
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Project Difficulties

• Audio amplification with DC voltage and digital
  potentiometer
• Powering MP3 device through a relay
• Insufficient amount of memory on ATmega644P for
  menu system, minimization of code was performed.
• SD Card communication over SPI

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Project Difficulties

• Implementation of a software serial system
• Timing over an I2C connection
• Keeping the complex menu system intuitive and
  easy to use
• Integrating and testing with the Pulsor Pressure
  Sensor

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Work Distribution

• Andrew
• Power Supply
• Battery Backup
• FM Implementation
• PCB Design
• Audio Output

• Josh
• Wireless Xbee Implementation
• Software/Hardware Libraries
• External Enclosure Design
• Clock Implementation

• Philip
• Physical User Interface
• Graphical User Interface
• Behavior/Control Software
• Sensor System

• Matt
• OLED Implementation
• MP3 Implementation
• Project Website

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Special Thanks

• Michael Angell - UCF B.S.M.E.
• External enclosure schematics for Solid Works
• Dr. Samuel Richie - Undergraduate Program
  Coordinator of EE/CpE
• Supporting the project

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Questions?Comments?Improvements?