Hijacking Power and Bandwidth from the Mobile Phone’s Audio Interface

Monday, August 16, 2010
7:00 PM
Free and open to the public

This talk will present our recent work on enabling pervasive personal sensing, focusing on HiJack, a system for stealing power and bandwidth from the mobile phone's audio jack. HiJack enables a new tier of small and cheap phone-centric sensor peripherals that support plug-and-play operation. More broadly, we envision the mobile phone will become a portal for perpetually-powered and physically-embedded sensors. Our harvester delivers 7.4~mW to a load with 47% efficiency using components that cost $2.34 in 10K volume. Integrating the pieces, this talk will present a combined system for delivering data and power over audio, and demonstrate its use by turning an iPhone into an inexpensive oscilloscope.

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Thomas Schmid

CI Fellows Post Doctoral Scholar
The University of Michigan