ATmega328 with Arduino Optiboot (Arduino Uno)

This is a ATmega328 IC in DIP package, pre-loaded with the Arduino Optiboot (Uno 16MHz) Bootloader. This will allow you to use Arduino code in your custom embedded project without having to use an actual Arduino board. To get this chip works, you will need an external 16MHz crystal or resonator, and a 5V power supply to create the minimum Arduino system.