Arduino
Arduino Nano
Breadboard-friendly ATmega328P board — same silicon as the Uno, 5V logic, no wireless.
A000005 · Arduino
🍌 Simulates in-browserOverview
The Arduino Nano packs the same ATmega328P as the Uno onto a small DIP-sized board that plugs straight into a breadboard. It's 5V logic (no level-shifting needed for most classic hobby sensors), has no radio, and — unlike the Uno — exposes two extra analog-only pins, A6 and A7, that can't be used as digital I/O. This part record models the classic Nano (fqbn arduino:avr:nano); the newer "Nano Every"/"Nano 33" family uses a different MCU and isn't the same part.
Wiring tip: 5V logic — the easy pick when a sensor's datasheet only mentions 5V; A6/A7 are analog-input only
Ecosystem: arduino
Pins & wiring
Logical two-sided map — confirm the package or board drawing before wiring.
All pins
Hover · click to selectSelected pin
5V
Also: +5V
- Direction
- Power
- Logic / rail
- 5 V
Regulated 5V out (also USB 5V).
Full pin table
| Pin | Name | Role | Direction | Voltage | Note |
|---|---|---|---|---|---|
| 5V | Power | Power | 5 V | Regulated 5V out (also USB 5V). | |
| 3V3 | Power | Power | 3.3 V | 3.3V from the USB bridge chip (low current — not meant to power much). | |
| VIN | Power | Power | — | Unregulated input (7-12V). | |
| GND | Ground | Passive | — | — | |
| 0 | UART | Bidirectional | — | Serial RX — avoid if using Serial. | |
| 1 | UART | Bidirectional | — | Serial TX — avoid if using Serial. | |
| 2 | GPIO | Bidirectional | — | ||
| 3 | PWM | Bidirectional | — | ||
| 4 | GPIO | Bidirectional | — | ||
| 5 | PWM | Bidirectional | — | ||
| 6 | PWM | Bidirectional | — | ||
| 7 | GPIO | Bidirectional | — | ||
| 8 | GPIO | Bidirectional | — | ||
| 9 | PWM | Bidirectional | — | ||
| 10 | SPI | Bidirectional | — | ||
| 11 | SPI | Bidirectional | — | ||
| 12 | SPI | Bidirectional | — | ||
| 13 | SPI | Bidirectional | — | Built-in LED. | |
| A0 | Analog | Bidirectional | — | ||
| A1 | Analog | Bidirectional | — | ||
| A2 | Analog | Bidirectional | — | ||
| A3 | Analog | Bidirectional | — | ||
| A4 | I2C | Bidirectional | — | ||
| A5 | I2C | Bidirectional | — | ||
| A6 | Analog | In | — | Analog input only — no digital I/O, Nano-only extra (the Uno doesn't have this pin). | |
| A7 | Analog | In | — | Analog input only — no digital I/O, Nano-only extra (the Uno doesn't have this pin). |
Wiring examples
Power-up
Any 5V hostRuns from its USB port with no extra wiring for most projects; VIN accepts an unregulated 7-12V supply (e.g. a 9V battery) when running standalone.
| Arduino Nano pin | Connects to | Note |
|---|
- A6 and A7 are analog-input only — wiring a digital device (button, PIR, etc.) to them will not work; use D2-D13 instead.
Specifications
Electrical
Interface
Footprint
No independently verified physical footprint is on file for this part yet.
Alternatives
Upgrades
Strictly better on the headline spec, but expect to touch firmware or wiring to actually use the difference.
Adds WiFi/Bluetooth and a faster dual-core MCU for close to the same price — but everything moves from 5V to 3.3V logic.
Compare with Arduino Nano- Logic Voltage: 5V → 3.3V
- Wi-Fi: no → yes
Similar parts
Does the same job with a different part. Expect wiring and library changes — a starting point, not a guarantee.
Similarly cheap, faster dual-core ARM MCU, but 3.3V logic and no built-in EEPROM emulation the way AVR has.
Compare with Arduino Nano- Logic Voltage: 5V → 3.3V
- Core: AVR 8-bit → Dual ARM Cortex-M0+
Documents
Datasheets
- Arduino Nano DatasheetArduino
Product pages
- Arduino NanoArduino
Frequently asked questions
What voltage does the Arduino Nano run at?
The Arduino Nano runs at 7–12V, per the spec sheet below. Always double-check against the specific board you have — some breakouts add an onboard regulator that changes the usable input range.
How many pins does the Arduino Nano have?
The Arduino Nano has 26 pins, communicating over I2C, SPI, UART. See the full pinout table in Pins & wiring for each pin's role.
Can I simulate the Arduino Nano before ordering hardware?
Yes — the Arduino Nano has a live in-browser simulation model, so you can exercise the circuit before ordering any hardware.
Where is the Arduino Nano datasheet?
Linked in the Documents section on this page, and cited on every spec that came from it.
Related references
Build it, do not just look it up
Describe your circuit in one sentence and Banana Board wires it to these exact pins, validates it, and lays out a fab-ready PCB.