Remember this LED turn signal bike jacket we posted a while back? Well Leah Buechley made a tutorial for making your own. It has a button on each sleeve for activating the turn signals. The instructable includes a handy sewing/wiring diagram and lots of key insights into sewing a circuit for an LED turn signal bike jacket. Includes a preview of the soon-to-be-available LilyPad LEDs (from Sparkfun). Leah has the tutorial mirrored on her site.