Voice Activated Shower

1
Voice Activated Shower
Advisor Dr. Joe Picone
2
Team Members

• Hunter Cobbs Schematics, Layout, Power Supply,
  Latency, PCB Integration
• Ashley Noble New Servo Development, Prototype
  Testing, System Testing
• Luci Puryear Valve Position Algorithm
  Enhancement, Solenoid Integration, Prototype
  Testing, System Testing
• Robert Warren Schematics, Prototype Testing,
  System Testing, Business Plan, MS Project

3
SCUM Overview
4
SOAP Design
Voice Input
Tokens
Command
5
Packaged vs Prototype

• Integration of AC and DC Circuits onto single PCB
• Integration of data logger onto board
• Latency Reduction
• Servo Upgrade
• Addition of Solenoid Valve
• System Testing

6
Design Constraints

• Reach Mixed Water Temperature within 2 degrees of
  Target Temperature
• Target Temperature will be reached in 30 seconds
• Voltage Requirements
• 5 V for the Board
• 4.8V for the Servo Motor
• 24 VAC for the Solenoid Valve

7
Valve Position
Tt
Tc, Th
Valve Position
Tt Th(Vp) Tc(1-Vp)
LUT
ServoSet
Vp (Tt - Tc)/(- Tc Th)
Tt Target Temperature
Tc Cold Water Temperature
Th Hot Water Temperature
Check New Temperature
8
System Performance
Graph comparing past and present system
performance
9
Latency Comparison
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Servo Motor Comparison
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Solenoid Valve
12
Power Supply
13
Power Conservation techniques
14
First PCB Layout
15
Second PCB Layout
16
PCB Board

• Picture of finished board

17
Product Cost

• Prototype
• Rabbit 2000 7.50
• Servo 9.00
• Thermometers 6.25
• Valve 20.00
• RS-232 Chip 5.00
• Miscellaneous 30.00
• Total 77.75
• Retail Cost 311.00

• Packaged
• Rabbit 2000 20.00
• Servo 26.00
• Thermometers 6.25
• Valve 20.00
• RS-232 Chip 2.30
• Miscellaneous 13.00
• Solenoid 15.00
• Transformer 15.00
• Board 5.00
• Total 122.55
• Retail Cost 490.20

18
QUESTIONS?