https://www.arduino.cc/en/Main/Standalone

[SriVidyut]

Building an Arduino on a Breadboard Overview This tutorial shows you how to build an Arduino compatible breadboard with an Atmel Atmega8/168/328 AVR microcontroller and FTDI FT232 breakout board from SparkFun. You could also use the Arduino USB Mini. Originally created David A. Mellis Updated from t