solar powered smart blind (spsb) system smart home automation
DESCRIPTION
SOLAR POWERED SMART BLIND (SPSB) SYSTEM Smart Home Automation. SOLAR POWERED SMART BLIND. [11 March 2009] Lai LiEE Naing OoEE Kevin-Long VoEE Marco HerreraCompE GEORGIA INSTITUTE OF TECHNOLOGY. SOLAR POWERED SMART BLIND. WHAT - Self-sustaining, fully automatic blinds - PowerPoint PPT PresentationTRANSCRIPT
SOLAR POWERED SOLAR POWERED SMART BLIND (SPSB) SMART BLIND (SPSB)
SYSTEMSYSTEM
Smart Home AutomationSmart Home Automation
SOLAR POWERED SMART BLINDSOLAR POWERED SMART BLIND
[11 March 2009]
Lai Li EENaing Oo EEKevin-Long Vo EEMarco Herrera CompE
GEORGIA INSTITUTE OF TECHNOLOGYGEORGIA INSTITUTE OF TECHNOLOGY
SOLAR POWERED SMART BLINDSOLAR POWERED SMART BLIND
• WHAT - Self-sustaining, fully automatic blinds
• WHY - Profitable market, convenient
• WHO - Disabled, senior citizens, automation enthusiasts
• COST - Competitive in prices with current products
SPSB System OverviewSPSB System Overview• Energy efficiency using solar power
• Blind will be fully automatic
• Manual override can be performed by the user
• Blinds auto adjust based on user input mode
• LCD will display date, time, room temperature, and current user select mode
Operational ViewOperational ViewStepper Motor
User Interface / Control BoxUser Interface / Control Box
02/14/2009 12:00 AM Mode: Bright
Indoor Temp: 27 C = 68 F
Manual Overrid
e Mode Select
DS1621 Temp
IC
e
02/14/2009 12:00 AM Mode: Bright
Indoor Temp: 27 C = 68 F
Manual Overrid
e Mode Select
DS1621 Temp
IC
e
Design Schematic
Arduino MCU
STEPPER MOTOR DRIVER
STEPPER MOTOR
POWER MANAGEMENT
SOLAR PANELS
AC ADAPTER
BATTERY
PHOTO-RESISTORS
BUTTONS
TEMP
RTC
LCD DISPLAY
I2C Communication
• Only two I/O ports
• Bi-directional communication
• Multiple slave devices
Light Detection
• Four photo-resistors
• Pull-down resistor network
• Sensitivity– VOUT (0V – 5V)
Stepper Motor / Driver
• Four wire bi-polar motor
• Current range (150mA - 750mA)
• Power supply range from 7V to 30V.
Power ManagementPower Management
Solar Cell NiCad Recharging Circuit
Algorithm Flow Chart
START
RTC
DELAY
5 MIN
ADJUST
BLINDS
READ SENSORS
ALGORITHMDAY?
YES
NO
Demonstration Plan
• Recorded video demo: recording of SPSB throughout a day
• Live demo: user input modes and the blinds let light in accordingly
Problems and Issues• Electrical
Solar power might not be sufficient to power whole unitSolution: AC-DC power adaptor
• MechanicalStepper motor with driver might not provide enough torqueSolution: Servo motor with feedback
Budget and Cost Analysis
Current Expenditure
Sales3%
24%
21%24%
14%
14%
Blinds
Microcontroller
Power SupplySystemSensors/RTC/LCD
Stepper Motor +DriverMiscellaneous
$145.00
Project Schedule
SPSB System Current Status
Questions
?