Leah Buechley, a PhD student at the University of Colorado at Boulder, is well known for her electronic clothing–just take a look at the LED shirt project she did for CRAFT:01. Her signal jacket (above) for cyclists seems like such a fantastic invention that should be made by all you bikers out there and adopted into biking gear. The jacket is powered by the LilyPad Arduino which is available here at Sparkfun. Link.
From the pages of CRAFT:01
CRAFT: 01 – “The Electric Tank Top,” by Leah Buechley pgs 54 – 67. Digital Subscribers can read the article here. – Link.
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Signal Jacket for Cyclists