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Nickolas Potvin Advisors: Professors Hedrick, Cass, and Fernandes

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

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

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

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

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

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

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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

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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

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Solder reflow process

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

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

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

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

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