1. 1 December 2010 A. Ball, N. Jen, A. Sterk, K. Wiersma Calvin College Senior Design

2.  Project and Team Refresher  Scheduling Overview  Accomplishments  Tasks In Progress  Expected Status  Obstacles  Summary

3. (Left to Right) Amy Ball, Kendrick Wiersma, Nathan Jen, and Avery Sterk

4.  Make power usage information more available ◦ Measure the consumption of individual building circuits. ◦ Display power information as it becomes available.  Make metering and maintenance remote ◦ Transmit the total building power usage directly to the power company. ◦ Allow the power company to connect and disconnect power by sending a signal rather than a technician.

5.  Stewardship ◦ Promote awareness of power consumption ◦ Empowers users to identify their high-use devices and habits.  Transparency ◦ Reliably allow power delivery ◦ Do not interrupt power without request or expectation  Integrity ◦ Reliably provide accurate measurements ◦ Present these measurements in an intuitive interface

6.  Focus on individual subsystems ◦ Working in the little picture ◦ Still allows for big-picture design  Current focus: solid-state breakers ◦ Design ◦ Prototyping  External deadlines

7.  Met with Consumer’s Energy ◦ Smart Home demonstration ◦ Contacts for advice  Researched product competition ◦ Smart power meters ◦ Smart solid-state breakers  Defined budget and per-subsystem estimates  Selected features for inclusion

8.  Established rough requirements  Investigated design possibilities ◦ Researched existing designs ◦ Performed rough simulations  Selected metering device for prototype  Identified unforeseen constraints ◦ Data throughput ◦ Part specifications

9.  Solid-state breaker design ◦ Understanding how other designs work ◦ Producing or picking a design to use  Component testing ◦ Waiting for parts to arrive ◦ Designing/building testing devices  Big-picture design ◦ Evaluating design decisions and assumptions ◦ Defining subsystems and controllers

10.  Big-picture ◦ Requirements and subsystems fully defined ◦ Project budget defined  Solid-state breakers ◦ Circuit designs tested and selected ◦ Testing plan defined ◦ Device prototyped and tested ◦ Prototype refined after testing

11.  Part availability ◦ Testing requires current transformers, which just arrived.  Breaker design finalization ◦ Prototyping requires parts. ◦ Part selection depends on design.  Other deadlines ◦ Graded deadlines trump internal deadlines

12.  Initial research and investigation is complete.  Overall system requirements are still in flux. ◦ Those critical to current work will be finalized.  Solid-state breaker work is behind. ◦ Work intensity will increase. ◦ Deadlines will be handled more effectively.  Other subsystems are on hold (as planned).  The project is still feasible, but behind schedule.

13.  Clarifications?  Curiosity?  Comments?