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Randy's Discussions

figuring out the Antenna Tracker

Started this discussion. Last reply by iskess Oct 11. 39 Replies

ArduCopter-3.2 beta testing

Started this discussion. Last reply by Richard Kennedy 31 minutes ago. 2823 Replies

ArduCopter-3.1 released!

Started this discussion. Last reply by Bill Isenberger on Sunday. 1530 Replies

 

Welcome, Randy!

Latest Activity

Richard Kennedy replied to Randy's discussion ArduCopter-3.2 beta testing
"I wish I knew what they used. I bought some copper foil but it seemed to have no effect.  "
30 minutes ago
Phanivyas replied to Randy's discussion ArduCopter-3.2 beta testing
"Today I had 2 flights with 3.2 rc12. Stabilize, Alt Hold, Position Hold, Loiter works great. I have done a complete flight in Position Hold mode. The only problem was when I had switched "Land" mode, the copter descended nicely but after…"
32 minutes ago
Manu B replied to Randy's discussion ArduCopter-3.2 beta testing
"Great, I will test this during the weekend. I'd like to test PosHold, but MP does't ask list it. By changing the parameter to 16, should it work even if MP doesn't seem to display this flightmode? I will also run modified parachute…"
1 hour ago
Ravi replied to Randy's discussion ArduCopter-3.2 beta testing
"thanx fellow drone flyers for so much of support. i really admire this community. i ran the compassmot. the value was less than 30%. I will now move the GPS 5cm up from the current location and further away form the pixhawk and PDB. i have a 500mW…"
1 hour ago
Martin replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, I too had issues with occasional fly-aways with Pixhawk (and EKF On) that never happened before with AMP 2.6, but I think I may be on to the root cause now. I thought it was GPS at first, but it seems maybe not now... With the APM 2.6 I never…"
1 hour ago
Nick replied to Randy's discussion AC-3.1 autotune support discussion
" Here's a test I did very recently. From what i've read on the wiki, this is well within the limits (red bars). Ill put stab_P on a pot and play with it this weekend and see what happens."
3 hours ago
Roque CANALES replied to Randy's discussion ArduCopter-3.2 beta testing
3 hours ago
Roque CANALES replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, About landing detector, I know that it' s set to be threshold below 25% of throttle output... I dispose an hexarotor with big motors that for hovering need 30% throttle output. By time and for a short time, the drone drops…"
3 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"AC3.2-rc13 is now available through the mission planner.  I've updated the top part of this discussion to include the changes since -rc12. Thanks!"
4 hours ago
Gustav Kuhn replied to Randy's discussion ArduCopter-3.2 beta testing
"It's not the gps that causes the problem, it is the magnetometer that has to be distanced from stray magnetic fields. On the Phantom it lives down on one of the legs ?"
6 hours ago
John Dennings replied to Randy's discussion ArduCopter-3.2 beta testing
"On the phantom  the GPS is very close to the FC indeed but it is shielded with a sheet of copper."
7 hours ago
Richard Kennedy replied to Randy's discussion ArduCopter-3.2 beta testing
"One thing I can't figure out is how is it that The Iris or the Phantom have the gps in such close proximity to the electrons yet it is fairly well established that for us home made quads the gps and compass needs to be on a mast? I moved mine…"
8 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"A lot of good advice here already, I would add that it's unlikely to be a software issue but rather interference from something on the vehicle.  It could even be interference from the flight controller itself although I haven't…"
8 hours ago
Brad replied to Randy's discussion AC-3.1 autotune support discussion
"Leonard, Thanks for the response. The mass distribution is pretty spread out along the roll axis and the front two motors are slightly farther apart than the back two on this style of frame.  But I believe the CG is in the correct location for…"
8 hours ago
Artem replied to Randy's discussion ArduCopter-3.2 beta testing
"Are those apm and pixhawk on different copters? If yes, most likelly you have a noise problem, potential sources are noisy powersupply and/or the vTx especially if it is 1.2ghz  "
8 hours ago
DG replied to Randy's discussion ArduCopter-3.2 beta testing
"I use K-Index Monitor for my Android phone."
8 hours ago

Profile Information

About Me:
Lead developer of ArduCopter. I coordinate releases, provide support for users having trouble with their copters, add new features (most often based on ideas and suggestions from the community). I also help others get their code integrated into ArduCopter.

You can find numerous video tutorials from me here: http://www.youtube.com/channel/UCm393BzMOyRPUo8MtKp5alg
Please tell us a bit about your UAV interest
Interested in quads and helis mostly. I got my start in this field by reading the electronics tutorials from Sparkfun and from watching the success of Jack Crossfire's vicacopter. I've learned an enormous amount from the combined wisdom of the people on the DIYDrones forums and members of the core dev team including Jason Short, Tridge, Doug Weibel, Leonard and many more.
Hometown:
Karuizawa, Japan

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Randy's Blog

Red Balloon Finder

Posted on June 17, 2014 at 5:04am 30 Comments

As many probably know, this year's Sparkfun Autonomous Vehicle Competition (AVC) is similar to last year's except that a new challenge has…

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GPS Glitch detection in AC3.1

Posted on December 14, 2013 at 6:42am 32 Comments

AC3.1 is going out very soon and includes a new safety feature called GPS glitch detection.  There's a wiki page about it but I'd like to highlight how it works because it's near the top of the list of safety issues.  The method…

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Dropping a Rover from Hexacopter - Part III

Posted on August 22, 2013 at 7:40pm 32 Comments

As a follow-up to the rover drops #1 and #2 I spent a day with Assistant Professor Nagatani-san of…

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UAVs for measuring radiation levels in Japan

Posted on April 11, 2013 at 6:38pm 11 Comments

Two years after the March 11th tsunami in Japan that triggered the Nuclear disaster at the Fukushima power plant, there are still just over 300 thousand people who have not been able to return to their homes due to…

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Dropping a Rover from Hexacopter - Part II

Posted on March 15, 2013 at 12:32am 14 Comments

As a follow up to an indoor test we did a about a month ago (blog post here), Assistant Professor Nagatani-san of Tohoku University, Izu-san of…

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Comment Wall (24 comments)

At 8:44am on January 5, 2011, Jack said…

Randy

I have been working on my own Quad with the NG code and have setup the Sonar and have it working very well . I have an indoor version with sonar and IR sensors and would like to know were the IR sensors are conected, what pins. I see you were working on implementing this so If you could help with basic setup I can try my hand at testing. Thanks for your work on the Sonar and good luck on the obstical avoidence.

Jack 

At 5:47am on January 30, 2011, Kári Davíðsson said…

Thanks Randy. 

I do not have write access to the svn repository.

So I will send you the changed AP_ADC lib probably later today.

I am not sure if a circular buffer is needed. The beauty of a 1st order IIR filter is that we only need one "old" sample and if a second order is needed only two old samples. But I will look a little better into the filter selection before committing anything to you.

At 5:45am on August 24, 2011, Jiro Hattori said…

Hi Randy

 One of the way to introduce technology of arduino as IMU is that something like what you have done. Most of the Japanese model flyer love to fly traditional helicopter. 

 Another approach may be exhibit something very unique at MAKE fair at Tokyo Institute of Technology.  There will be many open source hardware and software freaks as well.

At 9:10pm on March 7, 2012, Ravi said…

hi randy, i had been following your forum for align450. i just got my APM2 purple. i loaded the ardu heli firmware. everythings looks to be ok on mission planner. but there is no PWM on servo out pins. i armed the APM2 and does gets armed. the radio callibration bars move proportionately. evrything seems to be OK. but in 'status' there is no PWM on channel out pins. it shows '0' PWM on all out channels. can uou please suggets what might be the reason. the APM2 works fine with arduplane and arduquad firmware. ravi

At 5:53am on March 16, 2012,
T3
Aerhead
said…

Randy

I had a different problem with my APM2 that I was able to solve by following the procedure found in the wiki with a search for APM board problems.  My board would not connect to the planner and it works now.

Good luck

Larry

At 2:18pm on May 15, 2012, wilson javier madrid sossa said…

hello hello hug.
I can help with anything, I did several plannings flight with tri and firmware 2.0.49 and flew very well.
I did a quad and install 2.5.4 program a waypoint flight and the team took off like crazy.WP PIDs are by default and does not really move as you do. can you give me some information.

I appreciate your help

At 4:41pm on May 16, 2012, wilson javier madrid sossa said…

Please can you help me. I was flying my quadcopter and hold position when you turn the team went to ground. these are the last two log. I appreciateprompt help.

2012-05-16%2018-12-25.tlog

At 3:54pm on September 29, 2012, Marooned said…

Hi Randy

After your changes to Optical Flow I'm having troubles with compiling the sources:

ArduCopter.cpp: In function 'void init_ardupilot()':
ArduCopter.pde:-1: error: 'SPI3' was not declared in this scope
ArduCopter.pde:-1: error: 'SPI3_SPEED_2MHZ' was not declared in this scope

I have spi3.h file include in ArduCopter.pde but somehow it's not working that way. I did fetch&rebase with original repo.

At 3:12pm on September 30, 2012, Marooned said…

Sorry for troubles. It's working now. Looks like Arduino IDE had some hiccup.

I should probably move to some better IDE as I'm using Arduino only for compiling/uploading and all files are edited in my fav editor and I have to restart Arduino every time I change something as it doesn't follow outside files changes.

Anyway, sorry for bothering you.

At 6:30pm on December 1, 2012,
T3
William Premerlani
said…

Hi Randy,

Regarding a question that Shyam asked about gimbal lock when he was trying to use APM to stabilize a camera, he and I finally solved the issue. Here is a link.

No one on diydrones was able to help Shyam, he finally contacted me directly.

Best regards,

Bill Premerlani

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