The LilyPad Arduino SimpleSnap is a small sewable computer. 50mm outer diameter Thin 0.8mm PCB. It can be snapped onto fabric and connected to other electronic pieces via sewn-on snaps or its companion LilyPad SimpleSnap Protoboard. This LilyPad board has 11 pins — the silver snaps that ring the outside of the board. Each of these pins, with the exception of (+) and (-), can control an attached input or output device (like a light, motor, or switch). This board is based on the ATmega328V microcontroller. The microcontroller is the black square in the center of the bottom of the board. You can program this LilyPad board using the Arduino programming environment.
This board has 11 pins (9 IO pins plus power (+) and ground (-) pins), an on-off switch, and a built in battery. The battery will charge whenever the board is attached to a computer. An orange charging light will glow while the battery is charging and turn off when charging is complete.
total pins 11
digital IO pins 9
analog input pins 4
PWM pins 5
power board powered by an on-board 3.7V LiPo battery sew-on snap size 2/0 (8mm diameter) NOTE: size subject to change
For more information, please check out wiki page