The LilyPad Arduino 328 Main Board is an Arduinoprogrammed microcontroller designed to be easily integrated into etextiles and wearable projects. It offers the same functionality you find in other Arduino boards in a lightweight round package designed to minimize snagging and profile with wide tabs that can be sewn down and connected with conductive thread.
The LilyPad Arduino consists of an ATmega328 with the Arduino bootloader and a minimum number of external components to keep it as small (and as simple) as possible. This board will run from 2V to 5V and offers large pinout holes that make it easy to sew and connect. Each of these pins with the exception of (+) and () can control an attached input or output device (like a light motor or switch).
LilyPad is a wearable etextile technology developed by Leah Buechley and cooperatively designed by Leah and SparkFun. Each LilyPad was creatively designed to have large connecting pads to allow them to be sewn into clothing. Various input output power and sensor boards are available. They?re even washable!