Microcontrollers 30 pins

Arduino Nano

Compact breadboard-friendly Arduino. ATmega328P, same power as UNO in smaller form.

// connector diagram 30 pins

// loading diagram...

// Specifications

Microcontroller

ATmega328P

Operating Voltage

Input Voltage

7–12V

Digital I/O

22 pins (6 PWM)

Analog Inputs

Clock Speed

16 MHz

// Pin Reference Table

Pin	Name	Function	Type
1	D1/TX	UART transmit	BUS
2	D0/RX	UART receive	BUS
3	RESET	Reset, active low	I/O
4	GND	Ground	GND
5	D2	Digital I/O, INT0	I/O
6	D3~	Digital I/O, PWM	I/O
7	D4	Digital I/O	I/O
8	D5~	Digital I/O, PWM	I/O
9	D6~	Digital I/O, PWM	I/O
10	D7	Digital I/O	I/O
11	D8	Digital I/O	I/O
12	D9~	Digital I/O, PWM	I/O
13	D10~	SPI SS, PWM	BUS
14	D11~	SPI MOSI, PWM	BUS
15	D12	SPI MISO	BUS
16	D13	SPI SCK, LED	BUS
17	3V3	3.3V output	PWR
18	AREF	Analog reference	ADC
19	A0	Analog input 0	ADC
20	A1	Analog input 1	ADC
21	A2	Analog input 2	ADC
22	A3	Analog input 3	ADC
23	A4/SDA	Analog 4, I2C SDA	BUS
24	A5/SCL	Analog 5, I2C SCL	BUS
25	A6	Analog input only	ADC
26	A7	Analog input only	ADC
27	5V	5V output	PWR
28	RESET	Reset, active low	I/O
29	GND	Ground	GND
30	VIN	Input voltage 7–12V	PWR

The Arduino Nano is a compact, breadboard-friendly microcontroller board based on the ATmega328P. It offers the same functionality as the UNO in a much smaller form factor, with 22 I/O pins and a Mini-USB connector.