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;


MicrocontrollerATmega32u4 Operating Voltage5V Input Voltage (recommended)7-12V Input Voltage (limits)6-20V Digital I/O Pins20 PWM Channels7 Analog Input Channels12 DC Current per I/O Pin40 mA DC Current for 3.3V Pin50 mA Flash Memory32 KB (ATmega32u4) of which 4 KB used by bootloader SRAM2.5 KB (ATmega32u4) EEPROM1 KB (ATmega32u4) Clock Speed16 MHz Length68.6 mm Width53.3 mm Weight20g

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Arduino Leonardo R3 with Free USB Cable

  • Product Code: Arduino Leonardo
  • Availability: 100
  • 750

  • Ex Tax: 750