Arduino Nano Board Description and Pin-outs

This is a tabular ‘diagram’ of the pin-outs for the Arduino Nano.

Hold the Nano board with the USB socket at the top, furthest from you, and the two rows of fifteen pins in each row pointing down. The six-pack of ICSP header pins on top of the board on your side.

This is for reference of the visually impaired. Although it is usable by anybody. Of course those of us who are VI cannot see or access the masses of diagrams and images of the pin-outs that exist on the Web.

Using the Table

The centre column of this table shows the count of the pin, by function, counting from the USB socket, from 1, down to pin fifteen at the bottom.

This should make it easy for you to count along pins with your fingernail when the board is not in a breadboard or a PCB, or with the tip of a pencil, for example, when the Nano is mounted.

READ the pin name of the pin you need from either the left or right column, and then read the pin number from the centre column.

For example, if you need the ‘A4’ pin (analogue to digital input 4), find that name (A4) in the left or right column, it is in the left, and then go to the centre column to find out how many pins to count from the USB socket to get to the physical pin.

The ‘A4’ pin is eight pins from the USB socket, in the row of pins on the left of the USB socket when the Nano is viewed as it is held in the above description.

So, count eight pins from the USB socket and there is the pin whose function is analogue-to-digital converter 4.

Note that the numbering scheme used in the centre column of this table may not match any screen-printed legend shown on the physical Nano board. It is just a way of finding the pin you need.

Pin Name Count Pin Name
- USB Socket -
D13 1 D12
3v3 Out 2 D11
AREF 3 D10
A0 4 D9
A1 5 D8
A2 6 D7
A3 7 D6
A4 8 D5
A5 9 D4
A6 10 D3
A7 11 D2
5v Out 12 GND
Vin 15 TX
- ICSP Header -