An Atmel ATmega328P running at 16MHz, pre-programmed with the Arduino® Uno bootloader. (The ATmega328 is the standard MCU installed on the vast majority of Arduino platform boards, including the Uno, Nano, Ethernet and others)
A handy label is attached to show the function of each pin on the AVR chip, which is very useful for breadboard applications.
The ATmega328P is the low-power capable version of this MCU, which will operate between 3.3V-5.0V at 16MHz. A useful feature for those that would like to run circuits using a single Li-Ion battery (nominal 3.7V).
This MCU will require the use of a 16MHz external crystal or resonator. A three-lead resonator is slightly easier to use since the two capacitors used with a crystal are eliminated.
Programming can be done with an external serial device like our FTDIbridge, or by placing the chip temporarily in an Arduino board such as a Duemilanove or Uno.
Because this AVR is running at a standard frequency, simply choose "Arduino Uno" in the Arduino "Board" menu.
The AVR will be pre-loaded with an Arduino 10Hz D13 "blink" routine, so you can easily check if your connections are correct!
An Atmel ATmega328P running at 16MHz, pre-programmed with the Arduino® Uno bootloader.