Datasheet

Here's some handy specifications:

ATmega328P onboad chip in QFN package

16MHz clock rate, 28K FLASH available

USB bootloader with a nice LED indicator looks just like a USBtinyISP so you can

program it with AVRdude and/or the Arduino IDE (with a few simple config

modifications).

Also has headers for an FTDI port for reprogramming

Micro-USB jack for power and/or USB uploading, you can put it in a box or tape it up

and use any USB cable for when you want to reprogram.

On-board 5.0V power regulator with 150mA output capability and ultra-low dropout. Up

to 16V input, reverse-polarity protection, thermal and current-limit protection.

Power with either USB or external output (such as a battery) - it'll automatically switch

over

On-board green power LED and red pin #13 LED

Reset button for entering the bootloader or restarting the program.

Works with 99% of existing Arduino sketches (anything that doesn't use more than

28K, and doesn't require pins #2 and #7)

Mounting holes! Yeah!

Industries

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