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Randy's Groups

Randy's Discussions

figuring out the Antenna Tracker

Started this discussion. Last reply by iskess on Saturday. 34 Replies

ArduCopter-3.2 beta testing

Started this discussion. Last reply by Randy 23 minutes ago. 2181 Replies

ArduCopter-3.1 released!

Started this discussion. Last reply by Alex O. Sep 25. 1522 Replies

 

Welcome, Randy!

Latest Activity


Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"I've just tested and updated the sonar/laser range finder wiki pages.  There were errors on nearly all the pages! Analog Sonar page had the scaling 100x too big. Maxbotix I2C page had the TYPE wrong for the Pixhawk LIDAR-Lite…"
23 minutes ago
Johnex replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Again! Here is the latest log from when the tricopter tipped to the side due to the wobble and motor slowly revving up with time after RTL not disarming. https://dl.dropboxusercontent.com/u/6749621/2014-10-01%2017-46-48.log Im sure you will be…"
1 hour ago
ultrojo replied to Randy's discussion ArduCopter-3.2 beta testing
"- not working when connect via usb, no any led. - can connect to MP via telemetry with supply power from lipo . and got some LED. not test to arm because pull all the wire already. - not using bec, non 3dr just power module. - use alexmos gimbal…"
4 hours ago
Roque CANALES replied to Randy's discussion ArduCopter-3.2 beta testing
"Is your pixhaxk working properly after that? when you power pixhawk is FMU power led and B/E led working properly? If not It seems to be a brownout !What bec and what current sensor you use?How have you connected gimbal?"
4 hours ago
Josh Welsh replied to Randy's discussion ArduCopter-3.2 beta testing
"I'll keep an eye out and if I see it shoot it over.  Thanks Randy."
6 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"Josh, I'm not sure but I've seen some times where I've landed but not put the throttle completely to zero.  The vehicle will recognise it's landed but it'll only reduce the overall throttle to the feedback level (which…"
6 hours ago
ultrojo replied to Randy's discussion ArduCopter-3.2 beta testing
"sorry typo. yes connection same as you. thanks correcting me."
6 hours ago
Josh Welsh replied to Randy's discussion ArduCopter-3.2 beta testing
"Stone1295, It does matter, and you're right in the way you config yours.  If you put the power distribution board between the power module and LiPo you will not get Current readings that are worth anything.  This is because the ESCs…"
6 hours ago
Josh Welsh replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, WRT the landing detector weirdness, I had a thought at the field the other day I meant to mention to you.  I wonder if the throttle-feedback facility you put in is getting involved at all here.  The other day when I took off in…"
6 hours ago
Stone1295 replied to Randy's discussion ArduCopter-3.2 beta testing
"Why lipo -> power distribution board -> power module -> pixhawk ?   I guess it doesn't really matter but I've always gone lipo -> power module -> power…"
7 hours ago

Developer
Randy replied to Randy's discussion AC-3.1 autotune support discussion
"Bernie, I'm not an expert on the Pixhawk hardware but if it's the same power-supply I wouldn't expect it to matter whether it's fed through the power port or where the ESCs connect at the back of the Pixhawk. I think the more…"
7 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"Karl, Ah yes, thanks for that.  I've modified my comment above."
8 hours ago
ultrojo replied to Randy's discussion ArduCopter-3.2 beta testing
"http://ardupilot.com/forum/viewtopic.php?f=49&t=6144#p11154 "If you are drawing so much current from your batteries that they cannot supply input power to the PM then you will have a brown out. Otherwise it is the most reliable power…"
8 hours ago
Karl Hanafin replied to Randy's discussion ArduCopter-3.2 beta testing
"Caution! If you just flip the props upside down the thing will still try to fly, just poorly...  I think you also want to swap them around (clockwise/counter-clockwise) so the copter is pushing down. I also clamp my copters down if I do this…"
8 hours ago
ultrojo replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, Appreciated your advices. Thanks."
9 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"ultrojo, The copter hovers at about 45% throttle which is a good level actually.  Slightly on the powerful side of which is always nice.  The motors are all nicely balanced it seems. I'm not an expert on batteries, but it looks…"
9 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 (23 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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