Prototyping Portfolio

Autonomously Heated and Cooled Office Chairs

Programmed custom Arduino based heating/cooling office chair, which was controlled remotely through a server connection. An Android application would periodically ask whether the user felt hot or cold to learn the user’s thermal comfort, and adjust the chair’s heating and cooling accordingly.


Prototyped the experimental office chairs, Android application, and server to conduct experiments to verify and assess energy savings potential of personalized thermal comfort systems.


Arduino, Android App


S. Carmichael, et al. Annual Energy Savings and Thermal Comfort of Autonomously Heated and Cooled Office Chairs. National Renewable Energy Laboratory, Golden, CO, 2016


Wearable Thermal Comfort System

Two prototypes of a wearable device for delivery of personalized thermal comfort. The first prototype demonstrates a wearable sleeve device that allows the user to indicate their thermal discomfort (hot, warm, neutral, cool, cold) using gesture controls and continously records skin temperature. Correlating wrist skin temperature with a person’s thermal comfort could provide data to build models for automated control heating and cooling systems. This prototype was published and presented at the “International Symposium of Wearable Computers”.

Building off the concept of automated heating and cooling systems, the second prototype is a peltier wrist watch wearable that turns on heating/cooling when the user either rubs the sensors on a sleeve, or pulls the sensor off the skin in a fanning motion. This allows for a more natural interaction with the wearable device compared to the gesture control in the previous version. This prototype was built for the CU Boulder Grand Challenge: Our Space Our Future, which reinvisions how wearable technologies could influence both the astronaut space suits and clothing worn by people in the future.


“Design and implementation of an adaptive wearable thermal comfort data acquisition prototype.” Adjunct Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2015 ACM International Symposium on Wearable Computers. ACM, 2015.