# Pixhawk CB REV\_E Schematics \*help please\*

**URL:** <https://discuss.cubepilot.org/t/pixhawk-cb-rev-e-schematics-help-please/8995>\
**Category:** Cube Autopilot\
**Created:** [2 June 2022 08:40 UTC](https://discuss.cubepilot.org/t/pixhawk-cb-rev-e-schematics-help-please/8995 "2022-06-02T08:40:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rahab](https://discuss.cubepilot.org/letter_avatar_proxy/v4/letter/r/f9ae1b/32.png) [@rahab](https://discuss.cubepilot.org/u/rahab)\
**Post date:** [2 June 2022 08:40 UTC](https://discuss.cubepilot.org/t/pixhawk-cb-rev-e-schematics-help-please/8995/1 "2022-06-02T08:40:46Z")

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Hello

I am interested in improvements on Pixhawk orange cube carrier board, I have Pixhawk orange cube REV\_E carrier board. I want to design a new PCB to improve myself and add additional features. Since it is open source, I searched on the internet as carrier board reference design and came across this link. [GitHub - The Cube](https://github.com/proficnc/The-Cube)

When I examined the documents and the card, I saw that they were two different revisions. A document of REV\_C containing Edison in the document in the link. I have the REV\_E version. That’s why I can’t understand why the other components around the Ping component are placed and what they do.

Could you please share the schematic documents of the REV\_E version?

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**Author:** ![Mallikarjun\_SE](https://discuss.cubepilot.org/user_avatar/discuss.cubepilot.org/mallikarjun_se/32/7496_2.png) [@Mallikarjun\_SE](https://discuss.cubepilot.org/u/Mallikarjun_SE)\
**Post date:** [2 June 2022 16:27 UTC](https://discuss.cubepilot.org/t/pixhawk-cb-rev-e-schematics-help-please/8995/2 "2022-06-02T16:27:31Z")

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I think pinouts itself are same! No changes have been made to carrier pinouts except external SPI pins which are repurposed in coming revision.

> [@ECN RFC 00000001 Pinout repurpose](https://discuss.cubepilot.org/t/ecn-rfc-00000001-pinout-repurpose/4335):
>
> Hi all If you or anyone you know are making custom carrier boards and this proposed change impacts you, please let me know. I would like to re-purpose the following pins in the DF17 main cube connector on future cubes. Pin 5, from EXTERN\_CS to RSV FOR FUTURE USE Pin 11, from EXTERN\_DRDY to RSV FOR FUTURE USE Pin 51, from SPI\_EXT\_MOSI to RSV FOR FUTURE USE PIN 67,from SPI\_EXT\_MISO to RSV FOR FUTURE USE PIN 73,from SPI\_EXT\_SCK to RSV FOR FUTURE USE I am unaware of anyone using the…

@philip can comment better on this.