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  • Kode sai susheel praneeth
  • drone hacker
  • David Torres
  • jon c
  • Silvio
  • Za Pf
  • Ibrahim Lassa
  • Robert Giordano
  • Keith M
  • camilo salazar
  • APMlover
  • Marshall Cant
  • paul hill
  • David Phelan

Hugues's Groups

Hugues's Discussions

AirbotServices's light 45gr Mobius 2 axis gimbal+vibrations tests

Started this discussion. Last reply by iskess Jul 28. 4 Replies

Finally found a bit of time to test the light 45gr 2 axis brushless gimbal we built for the Mobius camera,PS for Cala : better late than never ;)Continue

Tags: lightest, gimbal, Brushless, camera, Mobius

How to configure CAM_TRIG_DIST to ouput a PWM signal from a Pixhawk output ?

Started this discussion. Last reply by Hugues Mar 4, 2014. 5 Replies

Hi,I would lile to use the Survey function in mission planner which uses the CAM_TRIG_DIST method to trigger a camera at regular distance intervals.I'm using an infrared camera trigger which is activated by a PWM signal (configurable).The question…Continue

Is Minimosd incompatible with Sony NEX5R ?

Started this discussion. Last reply by Hugues Jan 7, 2014. 17 Replies

Hello,I'm trying to use my Sony NEX5 camera as a FPV camera using this HDMI AV converter :…Continue

NEVER connect a Capacitor backup or voltage protector on APM board

Started this discussion. Last reply by Hugues Nov 19, 2013. 71 Replies

Hi,Edit : from the posts below I deduce the issue seems specific to my config. Threfore I remove temporarily my request to add a line a caution in the wiki as it might not be a general problem for everyone, until further investigation and…Continue

[PROBLEM] Mission planner updater error

Started this discussion. Last reply by dudz Apr 17, 2013. 5 Replies

Hi,I launched today the mission planner that started an auto update. It starts downloading files updates (as visible in the console window) but after 2 minutes it stops with error, giving this display and error message:…Continue

LEDs use on APM2.5 board

Started this discussion. Last reply by TJ Feb 2, 2013. 1 Reply

Hello,I have seen a picture in the Wiki for the 2.0 APM board showing ouputs A9 to A4 being named "Motor LEDs".Is there any explanation what that is and how is it used ?For example can those outputs be used to power 12Volts LED strips ? (or is it…Continue

Programming with Arducopter/Arduino

Started this discussion. Last reply by duster3 May 6, 2013. 15 Replies

Hello,I would like to compile and upload the Arducopter code to my UAV. To do so I followed the instructions on the wiki, that is :-installed the Arduino 1.0.3 (Arudpilot) version on win7-installed the 2.8.1 software version (the two folders…Continue

Tags: Arducopter, Arduino, Programming

Sonar minimum distance ?

Started this discussion. Last reply by Leif Hedman Jan 9, 2013. 2 Replies

Hello,I have installed the sonar XLL-EZ0 on the quadcopter (3DR). Then I launch a sonar test though the CLI in the mission planner software. The arducopter is connected via USB only (no battery).The minimum reading with the sonar command is 20 cm.…Continue

Tags: EZ0, 3DR, Sonar

Power for analog pins (servos for roll/tilt, sonar, etc)

Started this discussion. Last reply by Hugues Dec 28, 2012. 3 Replies

Hi,On a 3DR quad arducopter, I am powering the APM2.5 with JP1 off and using the 5v input from the 3DR power module BEC (connects through the voltage measurement port).This powers , If I understood correctly, all of the APM2.5 boards including the…Continue

Tags: power, module, 3DR, servos, pins


Hugues's Page

◾ About Me:

◾I'm the founder of AirbotServices that provides UAV expertise and services for professionnals. We aim more particularly at serving the agriculture, real estate and industrial sectors.
Web site :


◾Engineer - Ecole Polytechnique of Brussels (ULB), specialization in Telecom & Electronics
◾MBA - Solvay Business School (ULB).

Please tell us a bit about your UAV interest:
◾I dove into the subject a few years ago when I was searching how to upgrade a very bad camera on my 8 years old son's remote controlled helicopter.
◾I found the diydrones community on the basis of which I built up this passion.
◾Contributing Blogger and Editor of DIYDrones APMcopter and APMplane wikis.
◾Currently developing AirbotServices products and services.

Latest Activity

Christian Mauch commented on Hugues's blog post How-to guide: Pixhawk with 6S batteries (> 4S)
"I've updated the web page, but it is still a mess... will spend some time next weekend to make it better."
22 hours ago
Dom Brown commented on Hugues's blog post How-to guide: Pixhawk with 6S batteries (> 4S)
"Decided to take a punt on the link that Para provided a few comments up.  The Mauch Electronics guy has 200a and 100a available for sale, but the website still acts a little strange.  The link to 'Products' doesn't actually…"

Hugues commented on Hugues's blog post How-to guide: Pixhawk with 6S batteries (> 4S)
"@Samuel, AirbotPower is rated to 150A max and 8S max, so your setup (140A, 6S) is fine with an AirbotPower board."
Samuel Mi commented on Hugues's blog post How-to guide: Pixhawk with 6S batteries (> 4S)
"@Hugues Given that I have two lipo battery packs for quadcopters individually, tattu 6S 10,000mAh 25C and tattu 6S 22,000mAh 25C, then what power modules should be chosen to power t-motor mn5208 motor with max. constant current 35A? To my knowledge,…"

Hugues replied to Jake Kutrufis's discussion Rover goes in tight circles when in Auto and RTL mode. Error Compass Variance Alert. in the group ArduRover User Group
"The compass variance comes from thé différent orientation between the Pixhawk and external compass. You seem to have a 180degree difference based on your pictures. You ave to set the orientation parameter right of the external compass."
Nov 24

Hugues replied to Randy's discussion figuring out the Antenna Tracker
"Manual servo test are fine with the Pitch, it is only in Auto mode that it does not work. I have also configured the parameter that gives the minimum distance to begin tracking and have set it to one meter for my bench tests. Worse, Sometimes it…"
Nov 24

Hugues replied to Silvio's discussion Companion: XU4 in the group Volta
"Link to github is a 404 error."
Nov 23

Hugues commented on Chris Anderson's blog post Hobbyking releasing new RC radio specifically for APM/Pixhawk
"@Linus +1"
Nov 22

Hugues replied to Randy's discussion figuring out the Antenna Tracker
"Another issue I am blocked at in figuring out antenna tracker; I have the antenna tracker configured in proxy mode (copter linked via 3DR radio to <-> a pixhawk on the antenna tracker with a second radio connected to <-> mission…"
Nov 22

Hugues replied to Randy's discussion figuring out the Antenna Tracker
"I had a 180 degree offset between current heading and next waypoint; I solved it by adjusting (trial and error) the "reverse" parameter of RC1 and RC2. This cnages the direction of rotation of the picth and yaw servos. You have to find the…"
Nov 22

Hugues replied to Benjamin's discussion Windows 10 and Pixhawk problems
"A shot in the dark but this happened to me in win 7, and incredibly it was solved after a reset and reinstallation of the Pixhawk firmware. "
Nov 22

Hugues commented on Chris Anderson's blog post Hobbyking releasing new RC radio specifically for APM/Pixhawk
"8 channels only? Are you kidding? You need already the 8 channels for a basic setup without any add-ons like lidar, a third gimbal axis, a sonar, an EPM gripper, video and camera triggers, focus, etc  16 channels or nothing please."
Nov 22

Hugues replied to Don Pillow's discussion New heavy lift design
"Hi, Nice project, congrats. It is always very satisfying to learn and build isn't it? You say you have motor mounts with four rubbers? Can you show details of these mounts ?"
Nov 22

Hugues commented on Geoffrey L. Barrows's blog post 360 degree stereo vision and obstacle avoidance on a Crazyflie nano quadrotor
"Incredible! Very impressed. This has to be the future of drones because: -it is self-reliant (no dependencies on weather nor environment blocking GPS signals) -it is small and light. All regulations in all countries will let people fly drones freely…"
Nov 20

Hugues commented on Jose Luis Cortes's blog post Successful flight test of gas+electric VTOL UAV: HYBRiX
"If I understand the description right, this does not make use of any batteries, just a gas engine producing direct dc current. This this in no way an hybrid vtol. It is simply a gas powered quadcopter.  I believe more in the real hybrid…"
Nov 19

Hugues replied to Dean Hitrec's discussion Attopilot 180 A, non linear voltage&current reading
"For the eaxct same attopilot stability issue, I decided to build my own current/voltage measurement board up to 8S...and hall effect current measurement which with the ACS758 provides more linear measurements up to…"
Nov 16

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Hugues's Blog

Build your own Antenna Tracking pan tilt system

Posted on November 8, 2015 at 6:08am 5 Comments


Willing to try out APM antenna tracking, I needed to procure myself with a mechanical servo based pan-tilt system.

This video is both a build log and a kind of "how-to" antenna tracker build guide for those who want to try build their own.

I logically first started to look around to purchase one; my market research basically…


AirbotPower board

Posted on September 27, 2015 at 3:21am 16 Comments

Figure1 : AirbotPower board recto

Figure2 : AirbotPower board…


Week-end DIY build project: 6S powered Pixhawk 900 mm quadcopter, experimenting with 3D printing.

Posted on August 9, 2015 at 12:40pm 13 Comments

Here a typical week-end "dronegeek" DIY build project : expermenting with 3D printing to make a 900mm Pixhawk quadcopter, with 380Kv motors, 16" props and powered by 6S batteries.

Credits for the frame : do not forget this excellent post from Forrest Frantz on light frame construction techniques:…


Comment Wall (11 comments)

At 10:26pm on March 19, 2013, Oliver said…

Hi, I just posted the parts list with some notes in the comments below my original post on the gimbal.



At 12:11am on March 20, 2013,


At 12:52pm on November 7, 2013,
Forrest Frantz

Didn't want to say this in the crowd.  But I think mass distribution has a bearing on the PIDs as does distance from the respective axis.

Example:  Say there is a rectangular cubic battery pointing fore and aft at CG on a symmetric quad copter.  Say the rotors are 20 cm from their axis and the battery is 10cm x 2 cm.

o The torque factor exerted in pitch over the battery would be 20/(10/4) = 8 to 1

o The torque factor exerted in roll over the battery would be 20/(2/4) = 40 to 1

If you have two steel wheels of the same mass, the larger one will be more difficult to get rolling (there is a larger change in momentum).

So it is 5x easier to roll than pitch.  I think that should be accounted for in the PIDs?  But maybe I'm wrong.

Of course this is an extreme example where everything else weighs nothing, so the differences in ratios are never that high.  But it is common I think for the factors to be up to 1.5X.

Your thoughts?

At 1:42pm on November 8, 2013, Tyler McGahee said…

Yeah, the PIDs are definitely affected by the "mass distribution" (moment of inertia), as well as by the motors and propellers and ESCs and the control algorithm and on and on. I don't think it hurts to list the PIDs though. Could save some time when starting from scratch on a similar or identical rig.

At 10:37pm on November 21, 2013, HobbyColombia said…


A curiosity ... as I turn apm 2.5 and esc with 2 separate batteries.

Battery 1: APM 2.5 and FPV
Battery 2 Engines - BECS (servos)


Thank you!

At 7:28pm on March 11, 2014, HobbyColombia said…

Ardupilot on PX4 + IO won't arm motors.

Hi I have the same problem Mystery 30A ESC's ...

You Might explain "load up the firmware ArduCopter" Bootload firmware?

System works without problem, arm and disarm perfectly.

Safety Switch OK.

Calibration OK, ENGINES TURN.

Connect and disconnect battery and ESC sounds uncalibrated, not save settings.

/ / / / / / / Can not save the ESC Mystery Calibration and PX4FMUIO / / / /

At 1:11pm on March 12, 2014, HobbyColombia said…


/ / / / / / / Can not save the ESC Calibration in PX4 FMU IO / / / /

You know it could be?

Another question.

You know how I connect to OSD Remzibi px4 as if telemetry data and to see video on my monitor?

We appreciate evidence.

Thanks for you time.

You are responsible to give answers of diydrones community? curiosity!


At 8:11am on August 26, 2014,
Forrest Frantz
At 1:45pm on December 15, 2014,
Forrest Frantz

4 motor mounts and 4 tube plugs, cut, lightly sanded, ready to ship, and after you clean, ready to adhere.

Where do you want me to send them?

At 9:25am on August 18, 2015, Rafael Fontela said…

Saw an old post from 2013 title Tiger motors-propellers combinations for an heavy lift octocopter, where after testing several motors props combinations you chose the Tiger 3510 360Kv.

I'm trying to upgrade my 3dr x8+ to be able to extent the flying time while increasing the payload to be able to use about 1200 extra grams for camera equipment etc.  At present my drone is equipped with the motors and props that come from 3DR ( SUNNYSKY V2216-16 KV800) and by them the drone will be able to lift 800 grm while having a fly time of 15 mnts (by what I have read more like 10).

I was wandering if you think that using the Tigers and the props combination I could achieve the results you had, also whether

I could run the 6s batteries.

Thanks so much for your time


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