Hugues
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Hugues's Discussions

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

Started this discussion. Last reply by Hugues Mar 4. 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. 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

Throttle channel 3 output either min, either max

Started Feb 7, 2013 0 Replies

Hello,I face a strange issue on my quadcopter 3DR:I calibrated the ESCs according to the following automatic procedure:1 Disconnect USB and battery. The entire system must not have power2 Turn your radio on and put the radio throttle stick at…Continue

Question about PITCH channel : what is forward, what is backward ?

Started Feb 3, 2013 0 Replies

hello,The question seems stupid but it is actually confusing for me to confugure the channel 2, pitch, on my Tx to correspond to what the wiki says : "CH 2: Pitch Forward = low PWM – Pitch Back = High PWM" Indeed , what is forward ? what is backward…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 : www.airbotservices.com

Background:

◾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 then 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

Jake Stew commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"You're telling me all you have is 10mW across 1.75 Mhz? I think you need to look into that more.  Essentially your gov. provents you from transmitting anything at all?  That just doesn't seem right. If that's the case then…"
8 hours ago
Hugues commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"Anyway in Europe we do not have a choice, it is 433mhz or nothing. APM telemetry bandwidth is totally fine with what the 433mhz band offers. No need for large bandwidth, this is not video."
14 hours ago
Hugues commented on Randy's blog post ArduCopter 3.2 ready for wider use
"It is indeed not required if you use it on the same board. I intend to use this one as the second GPS and that leaves me the compass free to use on another compagnon board, so I need a ground ref."
14 hours ago
Hugues commented on Randy's blog post ArduCopter 3.2 ready for wider use
"@Reuben, Here is how I bridged the GND from the GPS port to the missing Compass ground port: And then you have to hack a cable to be able to plug it in a pixhawk GPS & compass DF13 connectors: (the white connector and cable is orignally…"
20 hours ago
Jake Stew commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"It's unfortunate that some countries have squandered their ISM bandwidth by selling it off to licensed users. However, that doesn't really address the problem of the 433 band being tiny and crowded.  You've got lots of very cheap…"
21 hours ago
Hugues commented on Randy's blog post ArduCopter 3.2 ready for wider use
"Comment by 勇進 湯 yesterday Can  M8N GPS work for APM 2.6?  Yes but beware of two main issues with the Drotek model (probably explains its relatively low price, 50% cheaper than the M8 from virtualRobotix): -the compass…"
yesterday
Hugues commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"@Jake, the best frequency band obviously depends on the country you live in. Except in the US, most countries have their GSM frequency in the 900 MHz band. The most illegal and crowded frequency band to use....Therefore 433mhz."
Friday
Jake Stew commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"433 is somewhat popular currently, mainly because we don't have very good choices in telemetry radios.  The 900 band is a much better choice because of the less crowded band and good compromise between antenna size and range. In…"
Friday
Hugues replied to Randy's discussion ArduCopter-3.2 beta testing
"this sounds like a perfectly normal behavior to me (and proof GCS failsafe kicked in correctly). However your post and those of many other similar ones are due to a number of failsafe settings that people forget about (they are hidden in various…"
Thursday
Hugues commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"@Dom, "db" is a measurement metric used in physics for various phenomenons : acoustic, antenna gains, etc. "db" is the acronym of Decibel. A DB does not have a unit because it is the relative measurement versus a reference…"
Wednesday
Dom commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"Great post, thanks.  For those of us without the detailed technical knowledge about radios, it would be great to add a little explanation of the results for the laymen, like what the various db mean."
Monday
Hugues commented on Christiaan van Vollenstee's blog post DJI T600 Inspire - Hobbyking
"@mP1, I agree with the point they packaged lots of (not new) features in a very nice total package for an OK price; for those who like to buy a RTF. In the end it is not uniformity of opinion than matters; I am sure this model will do well in their…"
Nov 17
Hugues commented on Christiaan van Vollenstee's blog post DJI T600 Inspire - Hobbyking
"@Mustafa, mP1, if you read what I wrote you will notice I recognize the DJI marketing and commercial genius (that has effect on you two obviously). All the technical stuff you mention already exist for a long time in the drone world : SDks, optical…"
Nov 17
Hugues commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"@Tom, the tested signal has a fixed amplitude plus or minus one Db. The measurement of Rf explorer takes automatically the max measured signal.  @Rocketman, yes I think this measurement gives a conclusive relative comparison. Absolute…"
Nov 16
mP1 commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"@Hugues You didnt mention about your methodology such as the positioning of the antennas to the plane of the transmitting radio. Its a good note, its very easy to cook results by adjusting angles to the advantage of some and disadvantage of other…"
Nov 16
Jesse commented on Hugues's blog post 433 Mhz antenna comparison - DIY & standard stock models
"@RocketMan, sure you could go with a better analyzer, no worries... then don't forget the Faraday cage, then some precision equipment to measure the transmission angles, so on and so forth...  beats the hell out of nothing, and does give…"
Nov 16

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Please tell us a bit about your UAV interest
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Hometown:
Brussels

Hugues's Blog

AirbotServices fixed wing - wing extensions testing

Posted on September 16, 2014 at 12:30am 17 Comments

AirbotServices fixed wing is based on the well known XUAV Talon EPO frame. This plane has a standard wingspan of 1720mm . Although its wings are quite wide (total wing surface is 60 dm2 -…

Continue

Comment Wall (8 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.

Cheers,

Oliver

At 12:11am on March 20, 2013, Hugues said…

thx

At 12:52pm on November 7, 2013,
MR60
Forrest Frantz
said…

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, Alejandro Cadavid said…

Hello,

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)

Unrecognized?

Thank you!

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

Hi,

/ / / / / / / 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!

Thanks.

At 8:11am on August 26, 2014,
MR60
Forrest Frantz
said…

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