The Arduino Leonardo is a simple yet very versatile Arduino board based on the atmega32u4 processor.
It has a few interesting features:
Single processor architecture. There is only one microcontroller that communicates directly via usb with a computer. This makes the board cheaper and simpler The Arduino core libraries have been enhanced to provide a USB device stack. This allows the Arduino Leonardo to emulate a computer keyboard or a mouse. In the near future we expect to release more devices like MIDI.
More analog inputs, the leonardo has 12 of them!
More connectivity: Since the communication with the computer is done through a simulated serial port over USB, the hardware serial port on the processor is free for your applications.
Specifications:
Microcontroller: ATmega32u4
Operating Voltage: 5V
Input Voltage (recommended)L: 7-12V
Input Voltage (limits): 6-20V
Digital I/O Pins: 20
PWM Channels: 7
Analog Input Channels: 12
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by bootloader
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