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The 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 MHzcrystal 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 differs from all preceding boards in that the ATmega32u4 has built-in USB communication, eliminating the need for a secondary processor. This allows the 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.
Microcontroller | ATmega32u4 |
Operating Voltage | 5V |
Input Voltage (recommended) | 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 |
SRAM | 2.5 KB (ATmega32u4) |
EEPROM | 1 KB (ATmega32u4) |
Clock Speed | 16MHz |
