(Archive of: http://www.thing-a-day2.com/2008/02/12/day12-thing12-helmet-taillights/) One of our local dorkbots put an arduino in a bucket the other day and I got inspired to put one in my head bucket. I lined the two largest holes in the back of the helmet with foil tape (for ducts) and then built two boards with leds and mounted in… Read more »