The Nano IO Expansion Shield is a breakout board for the Arduino Nano (v2.x/v3.x, ATmega328P or ATmega328PB) that mounts onto the Nano's pin rows and re-exposes every pin as simple, labelled G/V/S header rows, ideal for wiring servos, sensors and modules without a rat's nest of jumper leads. An onboard DC barrel jack and reset button round it out for standalone, externally-powered builds.
- Breaks out 14 digital I/O as G/V/S servo-style headers
- 8 analog inputs with dedicated power + GND rows
- 6 PWM-capable pins broken out
- Dedicated servo power input header
- 5-pin I2C expansion header (SCL/SDA/5V/GND)
- AREF and 3.3V outputs broken out
- Onboard DC barrel jack + reset button
- Fits Arduino Nano v2.x and v3.x (ATmega328P/328PB)
Specifications
What's in the box
Plug your Arduino Nano into the two central pin-header rows to use. Nano module sold separately.
Great for
Getting started
- Mount your Nano
Plug your Arduino Nano (v2.x or v3.x) into the two central header rows, matching the pin labels silkscreened on the board.
- Wire your devices
Use the G/V/S rows for servos and sensors, or the A0-A7 analog breakout for analog sensors.
- Power it appropriately
Run off the Nano's USB for light loads, or plug an external supply into the onboard DC jack when driving servos or higher-current devices.
- Reset as normal
The onboard reset button mirrors the Nano's own reset pin.
Common questions
Does it come with the Arduino Nano?
No, this is the expansion shield only, the Nano module is sold separately.
What do the G/V/S labels mean?
Ground, Voltage (power) and Signal, the standard 3-pin servo-style pinout used on each breakout row.
Can I power servos through this board?
Yes. Use the dedicated servo power input or the onboard DC jack to feed servos from an external supply, keeping heavy current off the Nano's own regulator.
Does it support I2C sensors?
Yes, a dedicated 5-pin I2C header breaks out SCL, SDA, 5V and GND.
Does it work with the ATmega328PB Nano, not just ATmega328P?
Yes. The ATmega328PB is a pin-compatible variant that shares the same Nano v3.x footprint and pin layout as the ATmega328P, so it seats in and works with this shield identically.
Is it compatible with the Nano Every or Nano 33 IoT?
No, this shield is designed for the classic ATmega328P/328PB-based Nano v2.x/v3.x pinout, not the newer Nano Every or Nano 33 IoT boards.
Good to know: This shield is designed for the classic Nano v2.x/v3.x (ATmega328P or ATmega328PB) pinout, not the newer Nano Every or Nano 33 IoT. Every board is checked before it ships from our Te Awamutu stock.