The Arduino Leonardo with Headers is an official Arduino board that uses the ATmega32u4 microcontroller. It has a built-in USB-to-serial converter, which allows it to communicate with a computer as a USB device. This makes it ideal for applications such as controlling a computer mouse or keyboard, or creating USB devices such as a MIDI controller.
The Arduino Leonardo with Headers has the following features:
ATmega32u4 microcontroller
Built-in USB-to-serial converter
20 digital I/O pins (of which 7 can be used as PWM outputs and 12 as analog inputs)
16 MHz crystal oscillator
Micro USB connection
RESET button
ICSP header
The Arduino Leonardo with Headers has the following specifications:
Operating voltage: 5 VDC
Input voltage (recommended): 7-12 VDC
Input voltage (limit): 6-20 V
Digital I/O pins: 20
PWM pins: 7
Analog input pins: 12
DC current per I/O pin: 40 mA
DC current for 3.3 V pin: 50 mA
Flash memory: 32 KB (ATmega32u4) of which 4 KB is used by the bootloader
SRAM: 2.5 KB (ATmega32u4)
EEPROM: 1 KB (ATmega32u4)
Clock speed: 16 MHz
Dimensions: 68.6 mm x 53.3 mm
Weight: 20 g