The LilyPad Arduino USB is a microcontroller board based on the ATmega32u4. It has 9 digital input/output pins (of which 4 can be used as PWM outputs and 4 as analog inputs), an 8 MHz resonator, a micro USB connection, a JST connector for a 3.7V LiPo battery, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a battery to get started.The LilyPad Arduino USB differs from previous LilyPad boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a separate USB-to-serial adapter. This allows the LilyPad Arduino USB to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port. It also has other implications for the behavior of the board.

Microcontroller ATmega32u4 Operating Voltage 3.3V Input Voltage 3.8V to 5V Digital I/O Pins 9 PWM Channels 4 Analog Input Channels 4 DC Current per I/O Pin 40 mA Flash Memory 32 KB (ATmega32u4) of which 4 KB used by bootloader SRAM 2.5 KB (ATmega32u4) EEPROM 1 KB (ATmega32u4) Clock Speed 8 MHz .

Documents:

• Schematic
• Eagle Files
• Datasheet (ATMega32U4)
• Datasheet (MCP73831T)
• Firmware Note
• Arduino Hardware Page
• Arduino Quickstart Guide
• GitHub
• Arduino Addon Files
• Product Video