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Written by Victor van Poppelen. The Arduino Nano The Nano is a very simple board, essentially just an AVR MCUwith an FTDI chip for communicating over USB. On the top left of the schematic1 is the pinout of the board, and in the centre is the pinout of the AVR chip (an ATmega328 or ATmega328p)2. You can follow the pins to various components, and/or directly to the pins of the board itself....