How To Power An Arduino Nano

How to power a Nano

  • Use USB. The design trusts the 5V to be regulated, and does not regulate it in any way.
  • Use a regulated power source, trusted to be 5V, and connect it to GND and 5V.
  • Connect an unregulated power source, eg a battery, to GND and VIN. This should be above 6.2V (since the dropout voltage is 1.2V) and preferably between 9V and 12V. There is a built-in regulator th

Use a regulated power source, trusted to be 5V, and connect it to GND and 5V. Connect an unregulated power source, eg a battery, to GND and VIN. This should be above 6.2V (since the dropout voltage is 1.2V) and preferably between 9V and 12V. There is a built-in regulator that will supply the Arduino with exactly 5V.

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The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source. So you can connect battery positive to Vin pin and negative to Ground pin directly.


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