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.
This version of the Leonardo comes assembled.
Input Voltage (recommended)
Input Voltage (limits)
Digital I/O Pins
Analog Input Channels
DC Current per I/O Pin
DC Current for 3.3V Pin
32 KB (ATmega32u4) of which 4 KB used by bootloader
2.5 KB (ATmega32u4)
1 KB (ATmega32u4)
If you want to give a closer look to this board we advise you to visit the official Arduino Leonardo page in the Hardware Section.
- Additional Information
Processor ATmega32u4 Architecture 8-bit Clock Speed 16 MHz Digital Pins 20 Analog Pins 12 PWM Pins 7 Hardware UART 1 Programming Interface Native USB Flash Memory 128K Operating Voltage 5V Power Output No Antenna No Range (Indoor/Urban) No Range (Outdoor/RF Line of Sight) No Channel Capacity No Frequency No Transmit Current @ 3.3V No