4558 LM4558 Low Noise Dual Op-amp IC (Pack of 2 Pcs)

The LilyPad Arduino Main Board is based on the ATmega328V. It features all digital and analog pins you would find on the Arduino UNO R3 (Digital 0-13 & Analog 0-5). to save space and make the board lighter they have removed the USB-port and USB to TTL chip, there for the Lily pad requires an FTDI to be programmed.