Controlled by ATmega328 with the Arduino boot loader.
Can you imagine that it has even fewer pins than the LilyPad Arduino Main Board, another property is that it has an on/off switch as well as a power socket supply.
The great thing about the battery compatibility is that it accepts any LiPo batteries which can be plugged into the socket; we recommend this product because it keeps everything simple, and under control, it allows you to work in peace basically! This revision does away with the ISP header and adds a charging circuit based on the MCP73831 IC.
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!! Available in Dubai, UAE, Oman, and Qatar!
Not sure which Arduino or Arduino-compatible board is right for you? Check out Sparkfun's Arduino Buying Guide!
Note: Because of the added battery charging circuitry the Simple is unable to power a device from the FTDI header meaning that the Bluetooth Mate, for instance, is no longer plug'n'play compatible.