Nickolas Potvin Advisors: Professors Hedrick, Cass, and Fernandes

 Sophomore Research Seminar in Usability Science Students build mock appliances out of ad-hoc materials Data collection and experimentation error-prone

 Want a system that performs these tasks automatically and interacts with user

 Create an easily modifiable board with various “widgets” (input and output devices) that can be added or removed

 Computer μ controller widgets  Widgets connected via 1-wire bus  TINI μ controller  ALL devices addressablelocation independent (e.g. two previous stoves)

 Experimenter does the following: Design Appliance Behavior Put Widgets on Board Perform User Study

 Experimenter decides widget interactions and appliance behavior  Scripting language  Code compiled for use on the μ controller  Program is ready to go!

 Before a user can simply plug in the desired widgets…  The widgets need to be designed and created 1-Wire chips Bus 7-segment display widget Widget slot Knob widget

 1-Wire Bus: All widgets addressable Location independent All widgets communicate on same bus  Form factor: All widgets same size (2” x 2”) Same connector to bus Same pin usage Interchangeable

 Solder reflow process

 Solder, solder, solder…  Attach top and bottom boards together  Widget ready at last to be used…

 Now that the user has some widgets to use they can run their program on the μ controller (TINI)

 Two widgets fully tested  Four widgets fully designed  Location independence  Working demonstration of design  Working prototype board  All elements tested  Scripting language Profit!

 User scripting language  Parser  Logger  Upgrade the “reflow oven”  Build a bigger board  More widgets!  Continuing next term…