Looking to break away from your microcontroller board on your next project? You can place this chip right on the breadboard with a 16 MHz crystal oscillator and run your programs without the need of the actual UNO board.
Or maybe you've fried the chip on your UNO board? Don't be ashamed, we've all done it! No need to worry though, this chip is a quick and easy fix to your board. This chip comes pre-loaded with the UNO bootloader, so you can swap the bad chip with this new one and your UNO will be ready to go with no additional setup. Just swap the chips! Easy fix, right?
ATmega328P With Arduino UNO Bootloader