Get Up Stand UpGuSu

Andrew LegerJoshua Rust

Matthew O’MorrowPhilip Bell

Group 5Summer 09

Problem

•Can’t always wake up on time•Most alarms are more “annoying” than waking

•Almost all alarms allow the user to go back to bed

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 user’s presence in bed and do not allow snooze or off option during their waking time

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 SD card slot• Tone buzzers

• User detection• Sensing system for detecting when user is in bed

Objectives• For thirty minutes after alarm time, if a user is

detected by the sensor system, the alarm will perform user chosen actions and silence itself anytime no user is detected

• The coffee maker will have local on/off control and will be remotely controllable by the alarm clock

• The alarm clock shall have a battery backup to prevent both clock time loss due to power outage and snoozing by unplugging

• Power usage will be designed around efficiency

Specifications

• System will not exceed 12”L x 9”W x 5”H

• It will display time and date in U.S. standard format (HH:MM) using LCD screen

• Battery backup will last through 8 hours or at least 4 hours (average power outage duration)

• PIR sensors will have 15 feet of wire for flexible placement

• Wireless integration will have a minimum range of 100 feet

System OverviewPhilip Matt -

Philip Josh

Andrew- Matt

Josh

Josh

Andrew

External Enclosure

Case DesignChosen material: WoodTop: PushbuttonsFront: LCD and SpeakerBack: Power cable,FM tuning knob, and SD Card slotSide: FM tuning knob

5”

12”

9”

Microcontroller

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, SD card

• Enough memory for system logic, device interfacing and capable of implementing a FAT16 file system (~14 KB)

ATmega644P SpecificationsThe 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

Alarm Implementation

Block Diagram

Microcontroller

Audio Amplifier

Buzzer

Speaker

MP3 Decoder

FM Tuner

Multiplexer

SD Card Reader

•A multiplexer (HI3-0509-5) will be controlled via the microcontroller to determine which audio device will be powered and passed to the speaker

•A common LM1458 Op-Amp will be used to amplify the audio, controlled with a digital potentiometer using I2C (AD5171)

Buzzers•Two buzzers will be used, the CPE-503 and the WST- 1205S

•The CPE-503 will be controlled with ramping voltage to slowly grow louder up to a maximum output of about 70 dB

•The WST-1205S will be turned on using 5V and has a set output of about 85dB, which is just under damaging sound levels from prolonged exposure

FM Tuner•TDA7000 chip chosen for implementation on a PCB without special processing hardware

•Tuning controlled via variable inductor and potentiometer, which will be part of the housing and connect to the PCB with leads for user tuning

SD Card Reader•SD Card will be used for playing MP3 files using the FAT16 file system

•Socket will be externally accessible

•Interface to the microcontroller will be SPI with only the option to read data

MP3 Decoder•STA013 chip used to decode data from SD Card through microcontroller SPI interface to speaker output

•When ready to receive data the STA013 sends a high signal to the microcontroller, simplifying implementation

•I2C data interface used for control

•It can determine sampling frequency up to 48 KHz and MP3 input rate of 320Kbit/sec, again simplifying implementation work required

User Interface

Physical user interface• Five pushbuttons

• Up, Down, Left, Right, Center

• Used to navigate menus during setting

• Used for audio controls while running and not within alarm time span

Liquid Crystal 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

Graphical user interface

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

Running Display Setting Display• What options can be changed

under current menu• Current setting• Highlight current selected

setting for changing

Sensor system

Sensor systemHypothetical Implementation

Sensor system• Wall/Ceiling mounted PIR sensor

• Aimed at bed• Wired directly for analog reading by GuSu system

• Wooden housing protects sensor and wires

• Allows for painting to match surroundings or “decorative” style

• Helps narrow sensing range to prevent detection of warm bodies outside of bedding area

Wireless Integration

Wireless IntegrationCoffee MachineThe coffee machine will be an off the shelf coffee machine which can be controlled locally or remotely by the alarm clock. The user can choose to enable the coffee machine start time with alarm time.

Xbee Series 1 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

Clock

Real Time Clock- DS-1307• Using an external clock will prevent timing issues in program execution.• Communicates with microcontroller over I2C interface• Stores HH:MM:SS and DD/MM/YYYY• Microcontroller pushes the next alarm time to the clock which in turn sends an interrupt back at alarm time

Power Supply

Power Supply

•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

12V Wall Wart

3.3V Step-Down5V Voltage Regulator

Op-Amp

-12V Battery

AC Wall Outlet

Mp3 Decoder ZigbeeMicrocontrolle

r

FM Tuner

LCD Screen Clock/Timer

PIR Sensor

Buzzer

SD Card Reader

Battery Back-up

Device RequirementsDevice Voltage Req.

(DC)Current Req. (Active)

Microcontroller 2V – 5V <10 mAFM Tuner 4.5V – 5V 8mALCD Screen 4V – 6V 10-115 mA (typ. 40)PIR Sensor 3V – 5V <100uABuzzers 4V - 6V 30 mAMp3 Decoder 2.4V – 3.6V <30 mASD Card Reader 3V 20 mAClock/Timer 2V - 5.5V 2 mAZIGBEE 2.1V – 3.6V 40 mAOp-Amp +12V and -12V 5 mAMultiplexer +12V and -12V 3 mATotals 2.4-3.6, 4-5, -12,

12250 mA max

Main power supply is a wall wart that provides 12V DC, and allows for 1A of

current

Backup Battery•8 AA batteries in series will serve as the backup battery

•These provide the most cost-efficient implementation, and are easily replaceable for the user

•AA batteries store roughly 2800 mA*h of charge, so this would provide roughly 12 hours of supply to the clock, assuming every device was active

Schematics1. A common 12V wall wart will be

used to provide the power2. The backup battery (12V) will only

activate when there are power outages, and the LED will only turn on if the battery is failing

3. LM7805 voltage regulator used as step-down, with an LED for visible confirmation of “power on”

4. DE-SWADJ is a variable voltage regulator with built-in capacitances. It will be used to step-down to 3.3V

5. The Op-Amp will be biased with the +12V source and a 12V battery

Software

Software• Creation• Software Engineers

• Josh Rust• Philip Bell

• Programming Languages• Arduino/C++

• Development Environment• Arduino 0015

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

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

Current State

Printed Circuit Board

•Current Finalized Design

•Filled Ground plane

•Created with ExpressPCB in conjunction with ExpressSCH

Current challenges• Another microcontroller may be necessary to control

MP3 decoder

• Final software design for tree menu navigation implementation

• Completion of base requirements in time to make productive attempts at “extra” features

• Complete unit testing of software will be complex

Project BudgetComponents Total Cost

uOLED-160-G1 LCD Display

$79.99 (1)

Amtel ATmega644-20PU

$7.87 (1)

Sanguino Dev Kit $25.00 (1)

Xbee Modules $46.00 (2)

Coffee Machine $20.00 (1)

Housing/Case Supplies

$25.00 (1)

SD Card/SD Card Socket

$8.45 (1)

DS1305 Clock Timer $5.06 (1)

TDA7000 FM Tuner $7.00 (1)

Passive Infrared Sensor

$3.80 (2)

Directional Infrared Sensor

$3.80 (2)

Fresnel Lens $1.75 (5)

PIR Sensor Module $7.40 (1)

Components Total CostInfrared Induction Control

$2.70 (3)

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 $80.00 (1)

Miscellaneous $25.00 (1)

Total: $391.67

Project milestones

Project Progress

Work DistributionAndrew• Power Supply• Battery Backup• FM implementation• PCB Design• Audio Output

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

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

Matt• LCD Implementation• MP3 Implementation• Project Website

Special ThanksMichael Angell ~ UCF B.S.M.E.• External enclosure schematics for Solid Works• Construction of external enclosure

Questions?