Arduino Leonardo R3 Development Board

The Arduino Leonardo R3 Development Board is an electronic component. Main ratings: Input voltage 7-12V; Input voltage 6-20 V; Maximum DC current through input/output 40mA, recommended: 20mA; Maximum DC current for 3.3V output 50mA. This page brings together the Arduino Leonardo R3 Development Board pinout and key specifications, with the full datasheet PDF to preview below or download.

Arduino Leonardo belongs to the Arduino line of easy-to-use, intuitive, and reliable development boards directed toward beginners and starters in electronics. Arduino Leonardo is a microcontroller board based on the ATmega32u4 microchip. The Atmega32u4 comes with a built-in boot loader, which makes it convenient to flash the Arduino board with our code. It consists of a total of 20 digital I/O pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a power jack, a micro USB port, a 16 MHz crystal oscillator, an ICSP header, and a reset button.

The Arduino 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 on 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.