Reworked and expanded article about VBUS power for 3.3V Nanos

Author: seaxwi

content/Hardware Support/Nano Family/Enable-5-V-power-on-the-VUSB-or-VBUS-pin-on-Nano-boards.md

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+---
+title: "Supply USB power via the VUSB, VBUS or 5V pin on Nano boards"
+id: 360014779679
+---
+
+Many Arduino Nano boards are powered by 3.3 V but include a dedicated pin—labeled VUSB, VBUS, or 5V—that can output power from the USB port. This pin provides direct access to the 5 V line coming from the USB connection and can be used to power external components such as sensors, modules, or LEDs, while the board itself continues running at 3.3 V.
+
+In this article:
+
+* [Before you begin](#before-you-begin)
+* [Solder VUSB jumper pads (if required)](#solder-vusb-jumper-pads)
+* [Use the VUSB or VBUS Pin](#use-the-vusb-or-vbus-pin)
+
+---
+
+## Before you begin
+
+> [!WARNING]
+> Do not connect the VUSB/VBUS/5V pin to any of the other pins on the board.
+
+* The VUSB/VBUS/5V pin outputs power directly from the USB connector when enabled.
+* Power from the USB supply can range from 4.4 V to 5.5 V, per USB specifications.
+* Do not connect the VUSB/VBUS/5V pin to any of the other pins on the board. Supplying 5 V to other pins can permanently damage the board.
+
+---
+
+## Requirements for supported boards
+
+There are two main requirements for using the "VUSB" pin:
+
+* The board must be powered via USB. If you power the board through other means—such as a battery connected to Vin or a 3.3 V supply—the pin will not output anything.
+* On some boards, the VUSB line must be enabled by connecting a pair of jumper pads.
+
+The table below summarizes which Nano boards support 5 V output, what the output pin is called, and whether any action is required to enable it.
+
+| Board                          | 5 V output pin | How to enable                                       |
+|:-------------------------------|:---------------|:----------------------------------------------------|
+| Arduino Nano 33 BLE            | VUSB           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+| Arduino Nano 33 BLE Rev2       | VUSB           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+| Arduino Nano 33 BLE Sense      | VUSB           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+| Arduino Nano 33 BLE Sense Rev2 | VUSB           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+| Arduino Nano 33 IoT            | VUSB           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+| Arduino Nano ESP32             | VBUS           | Enabled by default                                  |
+| Arduino Nano Matter            | 5V             | Enabled by default                                  |
+| Arduino Nano RP2040 Connect    | VBUS           | [Enable by soldering VUSB jumper pads](#solder-vusb-jumper-pads) |
+
+> [!TIP]
+> On boards with VUSB jumper pads, the **VUSB pin** is located directly under the VUSB jumper pads on the bottom side of the board.
+
+---
+
+## Solder VUSB jumper pads (if required) {#solder-vusb-jumper-pads}
+
+Some boards have jumper pads that need to be connected to enable VUSB output:
+
+| Board                          | Jumper on bottom | Jumper on top |
+|:-------------------------------|:----------------:|:-------------:|
+| Arduino Nano 33 BLE            |         ✔        |               |
+| Arduino Nano 33 BLE Rev2       |         ✔        |       ✔       |
+| Arduino Nano 33 BLE Sense      |         ✔        |               |
+| Arduino Nano 33 BLE Sense Rev2 |         ✔        |       ✔       |
+| Arduino Nano 33 IoT            |         ✔        |               |
+| Arduino Nano RP2040 Connect    |         ✔        |               |
+
+To enable VUSB power on these boards, two unconnected solder pads labeled for VUSB must be shorted with solder or a zero-ohm resistor. This forms a bridge that allows USB power to reach the VUSB/VBUS pin.
+
+### Find the VUSB pads on the bottom side of the board
+
+On all supported boards, you can find a set of VUSB jumper pads on the bottom side of the board.
+
+![Location of the VUSB jumper pad on the bottom side of the Nano 33 BLE Sense Rev2.](img/nano-sense-rev2-ble-vusb-pad-bottom.png)
+
+### Find the VUSB pads on the top side of the board
+
+These boards include an additional jumper on the top side of the board. You can use either the top or bottom jumper to enable VUSB.
+
+![Location of the VUSB jumper pad on the top side of the Nano 33 BLE Sense Rev2.](img/nano-sense-rev2-ble-vusb-pad-top.png)