Leah Buechley is a well-known expert in the field of electronic textiles (e-textiles), and her work in this area includes developing a method for creating cloth printed circuit boards (fabric PCBs) and designing the commercially available LilyPad Arduino toolkit. (Source: MIT).

Here is her latest creation, using the Arduino: a jacket with user- controlled flashing lights on the back that can be operated as indicators or simply for visibility.