Arduino Leonardo ATMEGA 32.4U without Headers

TheArduino Leonardois a microcontroller board based on the ATmega32u4. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, a power jack, an ICSP header, 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 AC-to-DC adapter or battery to get started.

The Leonardo differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the Leonardo to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.

• ATmega32u4 Microcontroller
• 5V Operating Voltage
• 7-12V Input Voltage (recommended)
• 6-20V Input Voltage (limits)
• 20 Digital I/O Pins
• 7 PWM Channels
• 12 Analog Input Channels
• 40 mA DC Current per I/O Pin
• 50 mA DC Current for 3.3V Pin
• 32 KB (ATmega32u4) of which 4 KB used by bootloader Flash Memory
• 2.5 KB (ATmega32u4) SRAM
• 1 KB (ATmega32u4) EEPROM
• 16 MHz Clock Speed