# Baseboard Changelog

## Pixhawk Baseboard v1 to v2 

{% hint style="info" %}
The Pixhawk Baseboard v1 has been replaced by the v2A & v2B, with the following updates
{% endhint %}

*  **Smaller and More Compact Design:** The overall footprint of the board has been reduced, making it easier to integrate into various applications.
* **New Robust Pin Header Design**: Improved reliability with a improved pin header housing.
* **Added PWM Level Shifter**: Allows PWM output signal levels to be switched from 3.3V to 5V via a resistor or solder bridge.
* **Change to Aluminum CNC Case:** High-quality aluminum CNC outer case offers durability, efficient heat dissipation, corrosion resistance, aesthetic appeal, and EMI shielding.
* **Two Models Available:** Model A and Model B, each with the pin header facing different directions for more flexibility in installation.
* **Relocated of Ports**: UART4 & I2C, SPI, AD & IO, DSM RC, and JST USB ports have been moved from the top to the side of the board. AUX7, AUX8, and SBUS\_OUT/RSSI\_IN move to the side in a JST-GH Port.

Refer to these ports pinout page for more detail:

{% content-ref url="pixhawk-baseboard-v1-ports" %}
[pixhawk-baseboard-v1-ports](https://docs.holybro.com/autopilot/pixhawk-baseboards/pixhawk-baseboard-v1-ports)
{% endcontent-ref %}

{% content-ref url="pixhawk-baseboard-v2-ports" %}
[pixhawk-baseboard-v2-ports](https://docs.holybro.com/autopilot/pixhawk-baseboards/pixhawk-baseboard-v2-ports)
{% endcontent-ref %}

#### Dimension Comparison:

<figure><img src="https://2367252986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLIgtGDAvVGkCKGOJb1bR%2Fuploads%2FtqK5ttYTT6gSEeA1OCPq%2FPixhawk%20Baseboard%20Dimension%20Comparision.png?alt=media&#x26;token=16ef6210-c56c-4050-82ff-bcdc62929cb9" alt=""><figcaption></figcaption></figure>