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# Pixhawk Hardware Designs
-[](https://gitter.im/PX4/Hardware?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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+[](https://gitter.im/PX4/Hardware?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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+[](FMUv1/README.md) [](FMUv2/README.md) [](FMUv3_REV_D/README.md) [](FMUv4/README.md) [](#fmu_versions) [](FMUv5/README.md) [](#fmu-versions)
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[Pixhawk](http://pixhawk.org) is an independent open-hardware project that aims to provide "the gold standard" for readily-available, hiqh-quality and low-cost autopilot hardware designs for the academic, hobby and developer communities.
Pixhawk supports multiple flight stacks: PX4 ® and ArduPilot ®.
-> **Note** Designs are provided for a number of components used in unmanned vehicles, including: Autopilots (Flight Management Units - FMUs), ESCs (electronic speed controllers), optical flow sensors, etc.
+> [!NOTE]
+> Designs are provided for a number of components used in unmanned vehicles, including: Autopilots (Flight Management Units - FMUs), ESCs (electronic speed controllers), optical flow sensors, etc.
## What are Open Hardware Designs?
@@ -18,21 +25,23 @@ In essence, this definition allows anyone to freely study, modify, distribute, m
Hardware designs delivered by the project are listed below.
+
### FMU (Autopilot) Designs
Pixhawk FMU open designs include all information required to create an autopilot hardware product that is *firmware compatible* with other hardware created from the same design.
Manufacturers are encouraged to take the designs and create products that are best suited to a particular market or use case (e.g. for very small vehicles, or those that operate at environmental extremes).
-> **Note** While a physical connector standard is not mandated, newer products generally follow the [Pixhawk Connector Standard](https://pixhawk.org/pixhawk-connector-standard/).
-
+> [!NOTE]
+> While a physical connector standard is not mandated, newer products generally follow the [Pixhawk Connector Standard](https://pixhawk.org/pixhawk-connector-standard/).
#### Design Specifications
Designs are *usually* specified in the form of *schematics* that show all included components (CPU, sensors, etc.), how they are connected, and their pin mappings.
They may also include a BOM (bill of materials).
-> **Note** Not all designs deliver schematics.
- A minimal design needs to contain enough information for manufacturers to create a compatible products; this can also be achieved using a precise pinout definition and information about connections of internal/external busses, etc.
+> [!NOTE]
+> Not all designs deliver schematics.
+> A minimal design needs to contain enough information for manufacturers to create a compatible products; this can also be achieved using a precise pinout definition and information about connections of internal/external busses, etc.
#### Open Reference Hardware
@@ -60,9 +69,8 @@ FMUv4X | 2017 | Pixhawk 3 Pro | 168 MHz M4 | Slightly increased RAM. More serial
[FMUv5](FMUv5/README.md) | 2018 | Pixhawk 4 | 200 MHz M7 | New processor (F7). Much faster. More RAM. More CAN busses. Much more configurable.
> **Note** Minimum specification provided (pinout info, but no schematics).
FMUv5X | 2019 | Pixhawk 5X | 200 MHz M7 | Temp-calibrated, redundant sensors.
-
-> **Note** Products based on Pixhawk designs are listed here: [PX4 User Guide > Pixhawk Series]( https://docs.px4.io/master/en/flight_controller/pixhawk_series.html#pixhawk-series).
-
+> [!NOTE]
+> Products based on Pixhawk designs are listed here: [PX4 User Guide > Pixhawk Series](https://docs.px4.io/main/en/flight_controller/pixhawk_series.html#pixhawk-series).
#### Derived FMU Products
@@ -84,7 +92,6 @@ Relevant products are listed below:
- [IMUv3_REV_C](IMUv3_REV_C)
- [PSMv3_REV_C](PSMv3_REV_C)
-
## Dev Call
Pixhawk standards are developed in a weekly public developer call.
@@ -99,19 +106,19 @@ Pixhawk project schematics and reference designs are licensed under [CC BY-SA 3]
The license allows you to use, sell, share, modify and build on the files in almost any way you like - provided that you give credit/attribution, and that you share any changes that you make under the same open source license (see the [human readable version of the license](https://creativecommons.org/licenses/by-sa/3.0/) for a concise summary of the rights and obligations).
-> **Note** Boards that are *derived directly* from Pixhawk schematic files (or reference boards) must be open sourced.
- They can't be commercially licensed as proprietary products.
+> [!NOTE]
+> Boards that are *derived directly* from Pixhawk schematic files (or reference boards) must be open sourced.
+> They can't be commercially licensed as proprietary products.
Manufacturers can create (compatible) *fully independent products* by first generating fresh schematic files that have the same pin mapping/components as the FMU designs.
Products that are based on independently created schematics are considered original works, and can be licensed as required.
-
## Trademarks
The term *Pixhawk* is a trademark, and may not be used in product names without explicit permission from the trademark owner.
Typically this trademark is granted to the first board based on a particular FMU design and/or boards that use Pixhawk open reference hardware layouts.
-> **Note** A "Pixhawk" is an autopilot that has been been given permission to use the Pixhawk trademark in its name.
- While other boards are based on the "Pixhawk FMU Standard", the are not *strictly speaking* "Pixhawks".
-
+> [!NOTE]
+> A "Pixhawk" is an autopilot that has been been given permission to use the Pixhawk trademark in its name.
+> While other boards are based on the "Pixhawk FMU Standard", the are not *strictly speaking* "Pixhawks".