ee 396: accessors….. critical design review group members: allen bui ruthsenne gagarin erica...
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EE 396: ACCESSORS…..Critical Design Review
Group Members:Allen BuiRuthsenne GagarinErica Salvador
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Brief Overview of the project
Objective:
To create an accessor, a device that provides access for individuals who have limited abilities. This accessor will be a household utility controller that will allow the user to (independently access) interact with common household appliances.
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Project meaning
Milliea. Bio Cerebral Palsyb. Needs Independence
(Access to the following appliances)
• TV• Phone• Radio
c. Solution to NeedsModify X10 Home Automation Kit
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Components Needed:– Mount/user input – LED Display– Picaxe – X10 Remote
(Wireless Communication Controller)
– AppliancesTV, phone, radio
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Scanner sub-modulesA. LED Display
1. Vertical display
2. Horizontal display
B. Digital Signal Generator
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Physical set up
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Overall block diagram
•Scanner/LED Display•Controller (X10)•Transceiver
Major modules:
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real switch output address
crosspoint address
input pins
1ON 0001 0110 A6 in0*in7
1OFF 0010 0110 B6 in0*in6
2ON 0001 0101 A5 in1*in7
2OFF 0100 0110 C6 in1*in6
3ON 0010 0101 B5 in2*in7
3OFF 0100 0101 C5 in2*in6
4ON 0001 0100 A4 -----
4OFF 0010 0100 B4 -----
5ON 0001 0011 A3 -----
5OFF 0100 0100 C4 -----
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Two picaxe set up
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If want to turn appliance 1 on, output 0001 0110
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SCANNER-LED Display Circuit Layout
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Pseudo Code Map: Scanning Module
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Pseudo Code Block Diagram: Scanning Module
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SCANNER-LED Display Code
symbol counter = c1
main:for counter = 1 to 2 'Scanning LED lights vertically high 1 'appliance 1 wait 1 if pin4 = 1 then hdisplay 'input low 1 high 2 'appliance 2 wait 1 if pin4 = 1 then hdisplay low 2
high 3 'appliance 3 if pin4 = 1 then hdisplay wait 1 low 3next counter
end
hdisplay: 'Scanning LED lights horizonticallyfor counter = 1 to 2 high 5 'on wait 1 low 5
high 6 'off wait 1 low 6next countergoto main
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Methods of testing
• LED’s (LED lit, high voltage)
• Multimeter (measure for high voltage)
• Go for broke! (not preferred)
• If something smells burnt – something’s wrong
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Remaining Tasks:
1. Fix code
2. Final testing
3. Fabricating
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Current problems• Picaxe too small (need one with just
one more input!)– Bigger picaxe enables to use more
appliance and easier to program
-Picaxe 28X and 40X are in the UK• PCB design dependent on type of
chips used• How do we link two picaxe together
to work as one?
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Gantt Chart
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Resources• http://archimedes.hawaii.edu/• http://www.homeautomationzone.com/x
10-over.shtml• http://cmap.ihmc.us/• http://www.rev-ed.co.uk/detail.asp?id=r
ev02&prodname=PICAXE
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• What are your questions?