ATMega328 32kB Flash microcontroller with pre-loaded Arduino UNO Optiboot bootloader.
Note: You will also need the Optiboot hardware libraries installed in your Arduino IDE. Not all add-on libraries are compatible with the Optiboot bootloader. (As of IDE version 0022). If you are using Arduino IDE v1.0, the Optiboot libraries are pre-loaded. Just select Arduino Uno from the Tools > Board menu.
Resources & DownloadsArduino Documentary: Open Source Hardware is Here
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