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John Arne Birkeland
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John Arne Birkeland's Groups

John Arne Birkeland's Discussions

Problem maintaining pitch when accelerating / decelerating.

Started this discussion. Last reply by Michael Zaffuto Jul 2, 2010. 29 Replies

Servo problem with the new red (328) cards?

Started this discussion. Last reply by Chris Anderson May 3, 2009. 22 Replies

 

John Arne Birkeland's Page

Latest Activity


Developer
John Arne Birkeland commented on CrashingDutchman's blog post Drone Pilots Are Buying Russian Software to Hack Their Way Past DJI's No Fly Zones
"This issue is little bit more complex then just removing NFZ restrictions. Lately DJI have been enforcing the use of GEO restrictions on top of the normal NFZ restrictions. The problem with this is that while NFZ's are mandatory as they should…"
15 hours ago

Developer
John Arne Birkeland commented on Chris Anderson's blog post How do modern open source autopilots compare to aerospace-grade IMUs?
"The difference is that the Gyro bias repeatability, in-run stability etc. numbers from the Honeywell are actual confirmed numbers, that they guarantee as long a the IMU is used withing the operational parameters. Our numbers are more a kind of…"
Wednesday

Developer
John Arne Birkeland commented on Jack's blog post Quadcopter brushless motor: which brand is most popular one?
"Been some years since my last purchase, but HengLi has been my go to brand for proper factory balanced motors at a reasonable price (compared to some other brands)."
Jun 6

Developer
John Arne Birkeland commented on Rachael Murphey's blog post How Drones are Changing the Tech Industry
"The number one problem with drones today, is that they get A LOT of media attention. So everybody want's to use them to solve problems, regardless of if they are the right solution for the problem or not. Just insert the word 'drone'…"
Jun 4

Developer
John Arne Birkeland commented on Bart Theys's blog post Meet CargoCopter: our latest generation of high-speed, long-range drones
"Rob, on racing drones that shape would definitely increase speed and stability in forward flight. But when doing aggressive maneuvers with a fpv racer, you want the drone to 'drop like a rock' when you cut the throttle."
Jun 1

Developer
John Arne Birkeland commented on Alexandre Mainardi (Nuvem UAV)'s blog post 3D Printed Halbach array Motor. 600W, over 80% efficiency!
"Yeah, I was thinking the same. Integrating parts of the motor into the gimbal structure would be interesting."
May 29

Developer
John Arne Birkeland replied to Ahmed Desoky's discussion What is the best single board computer and autopilot for fixed wing UAV? Without cost limitation
"The mot powerful companion computer hardware solution at the moment is without a doubt the Jetson TX2. But the easier to develop for is probably the Intel Edison, since you can prototype actual run-time algorithms on a normal desktop computer."
May 24

Developer
John Arne Birkeland commented on Gary Mortimer's blog post No more $5 FAA fee, John Taylor wins his case.
"Best news in a long time, and it does not even apply to me since I live in another country. That $5 registration 'rule' essentially functioned like some badly designed filter where the experienced users ignored it because it made no sense,…"
May 20

Developer
John Arne Birkeland commented on torben's blog post VISUO XS809W is a DJI Mavic Pro clone for $40 in china
May 12

Developer
John Arne Birkeland commented on Chris Anderson's blog post Drone learns to fly by crashing (a lot)
"I guess in this case computers learn the same way as humans. By crashing.."
May 11

Developer
John Arne Birkeland commented on Jimmy Oliver's blog post Walabot. Has anyone seen/experimented with this?
"As usual the videos and web pages are very light on actual information. Most detailed description I have found so far is this. https://walabot.com/walabot-tech-brief-416.pdf Seems to have much in common with multi-beam sensor technology, but using…"
May 1

Developer
John Arne Birkeland commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"@Huges, you seem to have a bad case of selective memory. The whole 'out of topic vomit' deal was started in this thread by Drotek, suddenly attacking 'the cube' with non factual statements. Up until that point, the…"
Apr 28

Developer
John Arne Birkeland commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"It's definitively good to have alternatives. But if you want to argue which one is the best, keep the facts straight. The new v3 is smaller then the current available breakout option for the cube. That is a fact, no argument there. But claiming…"
Apr 27

Developer
John Arne Birkeland commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"Yes, the whole point of EKF filters is to use multiple data sources to separate noise from actual data. As long as the signal to noise ratio is better then 50%, you will always get better results by adding more data points from the same time domain.…"
Apr 26

Developer
John Arne Birkeland commented on SkyDrone.aero's blog post Sky Drone FPV 2 - Long Range 1080p FPV Video + Command & Control - now available for USD 299.-
"@Auturgy, reading between the lines I figure they use some variations of an LVDS cable with raw data from the camera, and do all the video encoding on the 'motherboard'. The problem with having native encoding in the camera (Logitech 920…"
Apr 24

Developer
John Arne Birkeland commented on Chris Anderson's blog post OpenMV and ArduPilot tracking a colored ball
"The OpenMV seem like a great tool for learning. But be aware that the limited resources means you will likely not be able to progress very far past academic computer vision tasks like the classic red ball tracking. The key for most 'real…"
Apr 24

John Arne Birkeland's Blog

ArduPilot and DroneCode part ways

Posted on September 9, 2016 at 1:00am 140 Comments

Source: http://discuss.ardupilot.org/t/ardupilot-and-dronecode/11295

For the attention of the users, supporters, fans and corporate users of ArduPilot:

The ArduPilot project is going through a transition. We…

Continue

Fast accurate LIDAR

Posted on June 2, 2016 at 2:06am 5 Comments

Interesting article in EE Timers Europe. http://www.electronics-eetimes.com/news/light-centimetre-level-slam-drones/

Working deeply with CERN (European Centre for Nuclear Research)…

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GoPro announces third-party developer program

Posted on April 15, 2016 at 1:23am 1 Comment

Article from ZDNet.

GoPro quietly announced its Developer Program on Tuesday, as it looks to incorporate…

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DJI, Parrot, GoPro and 3DR leave Small UAV Coaliton

Posted on April 3, 2016 at 6:30am 7 Comments

From USA Today article Drone coalition splits as DJI, GoPro faction quits.

SAN FRANCISCO — The national group that represents companies that make and sell drones has split, with those focused on consumers…

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Just a normal day in the park

Posted on September 4, 2015 at 1:00pm 25 Comments

https://www.youtube.com/watch?v=t5JgnMJzCtQ

I just came across this one.

Disregarding all the usual concerns involved with manned flights of this type etc. I like the technical solution of using many self contained units, each with it's own battery, ESC, motor and propeller. Keeps it…

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Comment Wall (7 comments)

At 3:30am on April 17, 2011, thomas marschall said…
Hei

Fant deg her på diydrones og tipper du har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.

Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--

Vennlig hilsen / with regards

Thomas Bjørn Marschall

At 3:31am on April 17, 2011, thomas marschall said…
Hei

Fant deg her på diydrones og ser du kanskje har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.

Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--

Vennlig hilsen / with regards

Thomas Bjørn Marschall
At 6:31pm on April 17, 2011,
Developer
John Arne Birkeland
said…
Heisann. Har vel strengt tatt ikke et arducopter da jeg liker å bygge mest mulig selv, men flyr quad mm. ja. :) Noe samling høres moro ut.
At 9:30pm on September 1, 2011, Ravi said…

Hi john, i am able to get PPM output from a PIN of Thomas Scherrer 12 channel receiver. is the PPM sum signal compatible with the ATmega2560 PPM decoder or i have to decode it through a interface. actually i am more of an aircraft engineer and less of a electronic engineer. the signal is coming from a Futaba 7C Tx onto a 12 channel thomas Sherrer Rx on 12 channel pin. can i give it directly to PIN 1 of APM after shortening PIN 2 &3 or i have to use an interface using PPMencoder. please help. i am currently using APM2.23. thanx, ravi

At 3:43am on September 2, 2011, Ravi said…

Hi john, i tried giving PPM to channel 1 PIN of APM and shortend PIN 2 & 3. did not work. I am not getting PWM out to servoes. Thomas Scherrer Rx takes PPM pulse from Futaba 7C Radio. It has a UHF RF Module which has been connected to the PPM out of Futaba 7C, this drives a 12 channel Rx also designed by Thomas Scharrer. I think the PPM pulse form futaba 7C should pass on as it is to the Thomas Scharre Rx which has a PIN for direct PPM out? what should i do next.

At 7:33am on August 18, 2012, Adam Scriven said…

Hey John!

Do you have any updates on Crawler1? What do you think of the Redcat Rockslide 1/8th? How does it hold up to your use/abuse? One of the things about the RS is that the only place making after-market parts for it seems to be RedCat itself, not many 3rd party manufacturers. Has that been a problem?

Thanks for any updates you can provide! ;)

At 8:33am on April 15, 2013, baufay patrick said…

Mister.
I seek information for zero ys-x4 wiffi
you to be able to help me if me question poses has you
I thank you for answer
I am of Belgium
patrick.baufay@skynet.be

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