Description: The Arduino Leonardo is a microcontroller board based on the ATmega32u4 (datasheet). 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. It also has other implications for the behavior of the board; these are detailed on the getting started page.
- Input voltage - 7-12V
- 20 Digital I/O Pins (6 PWM outputs)
- 7 PWM outputs
- 12 Analog Inputs
- 32k Flash Memory (ATmega32u4) of which 4 KB used by bootloader
- 16Mhz Clock Speed
Note: Unlike previous versions of the Arduino, the Leonardo has a USB A-Micro B cable connector on board.