Arduino Leonardo with Headers

The original Arduino Leonardo is a microcontroller board based on the ATmega32u4, and has 20 digital input/output pins, of which 7 are PWM outputs and 12 are analog inputs. It also has a 16-MHz crystal oscillator, a micro-USB port, a power supply jack, an ICSP header, and a reset button. For use, the board is simply connected to a computer via a USB cable or powered by an AC/DC adapter or a battery. The Leonardo is distinguished from other boards by the ATmega32u4's built-in USB communication, eliminating the need for a second processor, allowing the Leonardo to function as both a mouse and a keyboard as well as a virtual serial/COM interface for the attached computer. 

Documentation: 

• Arduino IDE Download
• Getting Started Arduino Leonardo
• Documentation for Arduino Leonardo

Pinout Arduino Leonardo: 

Technical Details: 

• Manufacturer: Arduino 
  
• Manufacturer SKU: A000057 
  
• Microcontroller: ATmega32U4 
  
• ATmega32U4 Flash Memory: 32 KB (4 KB used by the bootloader) 
  
• ATmega32U4 SRAM: 2.5 KB 
  
• ATmega32U4 EEPROM: 1 KB 
  
• Clock Speed: 16 MHz (ATmega32U4) 
  
• Operating voltage: 5V 
  
• Input voltage (recommended): 7-12V 
  
• Input voltage (limits): 6-20V 
  
• DC current per I/O pin: 40 mA 
  
• DC current for 3.3V pin: 50 mA 
  
• Serial communication interfaces: 1x UART, 1x SPI, 1x I2C 
  
• Digital I/O pins: 20 
  
• LED_BUILTIN: Pin 13 
  
• PWM channels: 7 
  
• Analog input channels: 12 
  
• USB: Micro USB 
  
• Power supply connection: Barrel Jack 
  
• Dimensions: 53.3 x 68.6mm 
  
• Weight: 20g 

Delivery contents: 

• 1x Arduino Leonard with Headers