A-Team Home Central Control Unit Kevin Cooke Peter Larson Ben Verstegen Andreas Rugloski Aden...
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Transcript of A-Team Home Central Control Unit Kevin Cooke Peter Larson Ben Verstegen Andreas Rugloski Aden...
A-Team Home Central Control Unit
Kevin Cooke
Peter Larson
Ben Verstegen
Andreas Rugloski
Aden Abdillahi
Our Design
Home Central Control Unit– Controllable by
LaptopPhone
– Able to adjust or turn on/off household items
Functional Requirements
User will be able to access the system via:
Laptop: Through serial port (possibly wirelessly from within the house)
Phone: User ID, Password, Voice prompt,
Device status (with option to change device status)
Possible Extensions
Lights dim
Wireless laptop control
Remote made specifically for our system
LCD screen on the system
System can give feedback to user
Phone Interface R-TT7
Upon dialing you will hear a voice prompt– Enter user ID and password– Toggle/Check device status
Touch Tone phones (including cell phones)
R-TT7 connects to phone lineDecodes DTMF touch tones
Serial Interface
Computer connects to home unit via DB9 cable Control of each device using keyboard Monitor shows status of each device M68HC11K1 Serial Peripheral Interface (SPI)
Up to seven bi-directional I/O ports
Control Functions
Ability to check and adjust settings such as a thermostat
Control function to set temperature
Control different infrared devices (TV,stereo)Sending different IR pulses to devices
Hardware VS. Software
Hardware– Lack of programming experience, so we
will stick to hardware when possible– Touch-Tone Decoder– Thermostat and Garage Door Devices
Software– Microcontroller– Infrared Signal Processing– I/O Signal Processing
Purchasing VS. Building
Readily available products that we can use
Purchasing saves time, but building usually saves money
Money vs. Time … which is our biggest factor?
Saved time allows for greater functionality of the system (more things controlled)
The Breakdown
Microcontroller UnitWe must learn all of the relevant abilities of the 68HC11 microcontroller. This will be a lot of the “brains” of our unit.
Phone SignalWe will need to find hardware that can convert a phone signal into usable data that we can have perform functions.
More Parts…
Infrared DevicesWe will need to learn how infrared signals are sent to electronics. Once we learn how it is done, we must be able to manipulate or reproduce this in order to control devices using our system.
Thermostat/Garage Door CircuitsWe need to buy, take apart, and understand these circuits so we will be able to control them.
Why These Parts
R-TT7 Touch Tone Decoder: This piece of hardware does the exact function we were looking for and is relatively inexpensive.
68HC11 K1 Microcontroller: Readily available. Provided for us. Memory mapped I/O. Good serial communications interface.
Honeywell Pro Thermostat: Basic, so easier to learn the circuit. Displays the actual temperature and the set temperature, so it will display the changes the user makes.
What We Will Buy
1) Thermostat
2) Garage Door Opener
3) Hardware that converts phone input into usable signals
4) Blue tooth module transceiver for laptop*
5) LCD screen*
6) IR Transmitter*
*indicates that we may not need the item
Costs
Garage Door Motor – $75.00 Thermostat – $47.95 Basic LCD screen – $ 3.95 Blue Tooth Wireless Transceiver – $59.00 Touchtone Decoder (TT-7) – $41.95 I/R Transmitter – $15.00 Misc (Resistors, Caps, printed circuit board) $50.00
Total Cost: $292.85
TimelineTask Name
Preliminary Design Review
Critical Design Review
CD-R and Hard Copies
Collection of Data/Schematics
PPT Presentation
Rehearse for Presentation
First Milestone
Lighting and Phone Interface
Touch Tone Decoder
Garage Door Device
Micro Controller
Thermostat
Second Milestone
Computer Interface
Control Program
IR
Capstone Expo
Technical Reference Manual
Critiques
Display Board
CD-R and Hard Copies
Demo/Explanation
User's Manual
Device Housing
AGM
TBD
TBD
ADR
AGM
BV,PL
KC
ADR
AA,AGM
KC
BV
AA
BV
ADR
ADR
TBD
AGM
ADR
ADR
30 2 5 8 11 14 17 20 23 26 1 4 7 10 13 16 19 22 25 28 31 3 6 9 12 15 18 21 24 27 30 3 6 9 12 15 18 21February March April May
Deadlines and Goals
Feb 27th – CDR: phone control over lights Mar 20th – Milestone I: computer and phone
control over lights and at least 1 infrared device Apr 17th – Milestone II: computer and phone
control over lights, infrared device, thermostat and garage door motor
May 3rd – Capstone Expo: wireless computer and phone control over lights, thermostat, infrared devices, all bugs worked out
Risk and Contingency Plan
Largest Risks:- Lack of programming experience (all EE’s)- No one in the group has infrared experience- Time constraints
One semesterLearning curve
- Using unfamiliar hardware
Fallback Options
Project design is very modular
Test with wire wrap rather than going straight to printed circuit board
Get help from experienced programmers or people who have used the troublesome hardware
Exchange a non-functioning device with an alternate system device
Group Member Skills
Kevin – Programming experience, hardware Peter – Hardware, soldering Aden – Programming experience Andreas – Hardware, technical writing, soldering Ben – Programming experience
Who Needs to Learn What
Kevin – Serial port interface (I/O) Peter – Printed circuit board Aden – Serial port interface (I/O) Andreas – Thermostat/garage door circuits Ben – Infrared signals