The Perfect Shower Team – Clean Mikal Tirfe Sandra Wiese Negar Ehsan Tony Carosa Tim Plummer

Agenda  Project Description (Sandra)  Design Objectives  High Level Implementation (Tony)  Digital Control Unit  User Interface (Negar)  Analog Controls  Mechanical System (Tim)  Risk and Contingency Plan  Cost Estimate (Mikal)  Division of Labor  Schedule

Primary Design Objectives  To control the temperature of the shower  Control the water pressure of the shower  Manual user override  Safe in shower user interface  Shower ready indicator  Build a working model

Secondary Design Objectives  Continuous flow system  Four user presets  Low hot water warning  Advanced user interface (such as optical or voice)  Longest shower estimator  Power System  Metric/English unit selection

High Level Implementation

Digital Control Unit

User Interface  Safe for in shower use  Four seven segment LED displays  Six function buttons (On/Off, Temp set, Pressure set, Up, Down, Emergency off)  Five LEDs to indicate display mode

Analog Temperature Controls

Analog Pressure Controls

Mechanical System  Build complete demo system  Water pump  PVC piping  Catch tub

Risk and Contingency Plan Possible Risks  Not able to build motor controller  Sensor characteristics are not good enough for our purposes  Unable to meet safety standards  Team member unable to fulfill designated tasks Solution to Risk  Use stepper motor and digital control  Refine baseline objectives  External shower control  Re-evaluate schedule, workload, and baseline objectives

Cost Estimate  Mechanical parts$  Digital Components$  Analog Components$  Total$500.00

Division of Labor and Responsibilities Sandra: Team Coordinator, Analog System Tony: System Interfaces, Digital System Negar: Analog System, User Interface Mikal: Digital System, User Interface Tim: Digital System, Mechanical System

Project Schedule

Questions?