The OSOYOO Breakout Board for Nano is a circuit board designed for Arduino Nano, it adds LED indicators for each GPIO port, so you can use the indicators to know the status of the pins and easily verify your prototype code without even wiring it up.

We have added a reverse power protection circuit. When the user connects the power incorrectly, the system will automatically shut down to prevent damage to the circuit board. In addition, this break  board utilizes a 3-pin interface with 5V and GND pins on each pin for easy connection to sensor modules or SG90 servos.

With on-board screw terminals for seamless compatibility and a 5V/2A independent power supply providing extra power for servos and other sensors, these practical features make it easier to bring your great ideas to life.

Compatible List


If you plan to power the board through the DC header or screw terminal port, please note that the VIN voltage for the official Arduino Nano board is 7-12V DC. If you are unsure about the VIN voltage range of your Nano board, we recommend using a voltage below 12V to avoid damaging the board or causing other risks.


Tech specs

Name OSOYOO_IO_Breakout_Board_for_Nano_v.1.0
Operating Voltage 5V
Input Voltage (recommended) 7-12V
Input Voltage (limit) 7-16V
Digital I/O Pins 20
PWM Digital I/O Pins 6
Analog Input Pins 8
Power Switch Yes
External Power Output 5V/2A
Options for power input USB/DC005–2.1/Screw terminal/Male pinheads
On-Board LED Indicators All GPIO ports
Length 72 mm
Width 62 mm
Weight 25 g

Notes and Warnings


  1. Nano board connector: Please pay attention to the orientation of the Nano board when using it. Inserting it incorrectly or misaligning
  2. LED indicators: LED on if GPIO outputs/inputs high level, LED off if GPIO outputs/inputs low level.
  3. 2.54mm pitch pinheads:  The S terminal directly connects to the Nano board, it comes with 5V and GND pins for easy connection to sensors or servos.
  4. Screw terminal: Connect to all GPIO headers of the Nano boards, 2.54mm/0.1in pitch
  5. XL1509 chip: DC/DC converter, it supports a maximum output power of 5V/2A.
  6. 5V selector: The jump cap is mounted on the “DC1” side by default, this means that the 5V on the I/O board comes from the Nano board, if you are using an external DC power supply through the DC header or screw terminals, you should mount the jump cap on the “EXT” side, the 5V pins on the I/O board can provide up to 2A of current.
  7. Power Indicator
  8. Power switch
  9. Power terminal block: We recommend using a 7-12V DC power supply.
  10. DC005-2.1 socket: We recommend using a 7-12V DC power supply.
  11. External power out pinheads:  It provides additional power connections, 5V depending on how you power it and where the jump cap is on the 5v selector, and 3.3V from the Nano board.
  12. SI2302 chip: N-Channel MOSFET, here we use it in a power supply screw terminal anti-reverse circuit
  13. 74HC04 chips: It is a hex inverter. We use it to connect each I/O port to control the corresponding indicator.


If you use the USB on the Nano for power supply, please do not install the jump cap to the “EXT” side, which may cause the 5v pin to be abnormally powered and the power indicator to not light up.

Do not use both the DC header and screw terminal ports for power supply, this will risk damaging the circuit board and burning out the power supply.


When inserting, please pay attention to the boards‘ orientation,ensure the Nano board is correctly connected before applying power to the power supply interface to avoid damaging the board due to misalignment.

(The Nano board is not included in this product, you will need to bring your own or buy it directly from our website.)

Fritzing Part file download link:https://osoyoo.com/driver/OSOYOO_Breakout_Board_for_Nano/Fritzing-OSOYOO-Breakout-Board-for-Nano.fzz



If you have any problems or difficulties using this product, please contact us for quick and free technical.