AUAV-X1 , a new vision of the PX4 autopilot


Arsov RC Technology is proud to introduce a new vision of the PX4 v2 Autopilot board. The Arsov AUAV X1 is another elegant design from Phillip Kocmoud and Nick Arsov. Our goal was to product a high quality, compact, lightweight and cost effective alternative to the PX4 V2 or PixHawk autopilots. This is our first attempt to join the PX4 community after developing several successful designs for the MatrixPilot community. After we have finalized the design we will release the design files and schematics. The schematics will be released immediately to new owners. Initial supplies are limited and a deposit insures a boards in the first production run.

Early March , 2014

MEAS MS5611-01BA03 barometer

Memory - 8Mb SPI Flash. Could be expanded on demand up to 1Gb.

microIMU – choose one of the following 5 IMU offerings:
-ST Micro L3GD20H + LSM303D
-ST Micro L3GD20H + LSM303D + MPU6500
-Invensense MPU 6500
-Invensense MPU9250
-Maxim MAX21100
-Connector only for remotely mounted IMU

New power supply based on TPS63061 DC-DC Buck-Boost
The TPS63061 device provides a power supply solution for products powered by either three-cell up to six-cell alkaline, NiCd or NiMH battery, or a one-cell or dual-cell Li-Ion or Li-polymer battery. Output currents can go as high as 2A while using a dual-cell Li-Ion or Li-Polymer Battery, and discharge it down to 5V or lower. So you can connect a 2 cell Li-Po directly to the AUAV X1, and run it completely flat before brownout. Since it's a buck-boost converter, you can also power from a 5V BEC while still in regulation. Additional info about this Buck-Boost regulator could be found here -

4 x UARTs - 3 of them have Vcc, Tx, Rx, GND and one has a full set - Vcc, Tx, Rx, RTS, CTS, GND
1 x CAN with MAX3051
1 x I2C
1 x SPI
2 x ADC + 2 x ADC for current and voltage sensing
8 x PWM Receiver Inputs
8 x PWM Servo Outputs
2 x JTAG connection specifically for the TC2030-CTX-NL 6-Pin cable
micro SD card holder
micro USB connector
All inputs and outputs are ESD and EMI protected

30mm x 43mm

For additional information and availability, please visit our websites for US or for EU.

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  • Please, no need for separate sensors...

    More connectors -> more things to fail -> weight issues, etc.

  • Hi Nick !

    If I do not buy external MicroIMU and upload the latest firmware of PX4, should there be any issue ?

  • Moderator

    Awesome work Nick!

  • Nice, keep us informed :)

  • Anyway it's great seeing another 32bit board hitting the market... especially this small and this cheap :)
    Having enough processing power to run EKF is just great :)

  • Hi Rana,

    In our team we have code wizards we rely on. We have designed the AUAV-X1 to be compatible with the PX4 code, which makes us think we won't have much issues at all.

    About the microIMU boards...I think this is a real advantage to test various sensors. Now we have many of them on the market - ST, Invensense, Maxim, Freescale, etc. Is there a better way to test them but a replaceable IMU? Currently there are 4 set types in manufacturing - ST ( L3GD20H + LSM303D ), Invensense ( MPU6500 ), Invensense ( MPU9250 ) and Maxim Integrated ( MAX21100 ). Very soon we'll see which one is the best... :-)

  • Nick, I have been a great fan of yours, you know why ?....

    Just due to your super excellent proficiency in extreme miniaturization !

    Has anyone at your end modified the latest code of PX4 to make it work on this board and fly ?

    Various options for microIMU making the buyer bit confused, must be simplified.

  • Moderator

    As i told 3 years ago the future of APM will be on STM32 not on SAM3S  ( arduino due)  :) I'm happy to see new design where it is use but the main problem is not the design a new  board , but the important is to know in depth the internal architecture of this cpu. So after three years of development our Team know the limit and advantages of this cpu and that is important for good board design. Sure you need an LDO after the 5V DC DC. But i found a lot of problem on sensor if DC DC don't work well. The main problem found  are on PLL of radio and GPS device.

    In our revision of VRBrain NuttX design we prefer point on 1 cpu development it's more efficient , simple .  For the fault tolerant approach we are starting to evaluate to use cluster of boards that use spi-can bus with an RPC approach.



  • Hi Roberto,

    Yes, the input channels 1-8 are situated in such way because there is not enough space. We decided to stay on 30mm width to be able to use the X1 in tiny gliders. Our concepts from now on will be based on 1" and 1.2" width.

    About the MCUs - yes, we could use just one, but we decided to be as much compatible with the PIXHAWK firmware as possible. Our next X2 will have all these potential issues cleared. You understand this is our first glance at ST32 ARMs.

    About the 63061, please note it doesn't drive the sensors and MCUs directly, but via a precise LDOs. More, it is good filtered and as we followed the TI recommendations very strictly, we don't expect noise problems. More, when using with 5V or higher, it works in Buck mode and is silent enough.

    Best regards


  • Moderator

    Hi Nick,

    your shape design is similar to VRBRAIN , but in pin out you don't consider the standard . For example in CH1-8 input normally you have +5 in the center and gnd if you don't mantain that approach the user need to customize standard cable.

    Another question is why do you use 2 micro controller for do what is possible to do with only one ... i don't see any advantage . Only more complex system with more point of failure .

    About TPS63061 are you sure that don't have problem to sensor and gps ? Check it before to have a big problem on sensor and quality of gps. I yet evaluate it for my new design and don't pass my test. 



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