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John Arne Birkeland
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  • Norway
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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 replied to Aviv Cohen's discussion my new quadcopter built from scratch, but unstable - design problem?
"You are testing two unknown factors at the same time. Unknown frame configuration and unproven autopilot. You either have to test the autopilot in a known frame that flies, or use a autopilot that you know works in the new frame."
Nov 26

Developer
John Arne Birkeland commented on AKRCGUY's blog post First Official Pixhawk 2 Unboxing
"The point of internal dampening is to have the critical sensors isolated in a rigid cage that has a known mass. Knowing the mass is what makes it possible to select optimal dampening for the sensors. Remember your goal is to isolate the sensors from…"
Nov 9

Developer
John Arne Birkeland commented on Chris Anderson's blog post Next-generation FPGA flight controllers coming
"Calling it a next generation FPGA flight controller is a bit of a stretch. The main advantage of using FPGA is accurate timing needed for controlling I/O, and signal filtering for sensors etc. This is pretty much why FPGA's where created in the…"
Nov 9

Developer
John Arne Birkeland commented on Andrew Murphy's blog post Local Motors Airbus Cargo Drone-1st Test Flight
"Look at this picture, and consider there is a big pusher motor stuck at the end of the tail. Even without the motor, how could it be anything but tail heavy? Any experienced RC modeller would take one look at walk away. "
Nov 5

Developer
John Arne Birkeland commented on Andrew Murphy's blog post Local Motors Airbus Cargo Drone-1st Test Flight
"If they are having structural problems now, just imagine if they decide to also include the bent wing structure as in the original concept. But what really gets me is that the entire thing is like reading the happy adventures of your typical DIY…"
Nov 4

Developer
John Arne Birkeland replied to conor Dal's discussion Wifi FPV
"Wifi datalink no problem, WiFi digital video stream (h.264 and friends) lots of problems. The problem with digital video over WiFi can be boiled down to not having graceful degradation. On analog you have graceful degradation as an inherent part of…"
Nov 3

Developer
John Arne Birkeland commented on Chris Anderson's blog post Using AI to design a drone frame
"At the relatively low altitudes where we operate, wind will be gusty and turbulent more often than not."
Nov 2

Developer
John Arne Birkeland commented on Pete Hollands's blog post Drones are not ready for the mass consumer market
"That edge case is kinda obvious and in my opinion the Mavic did the only thing it realistically could do. They took of in opti (optical tracking) mode in a environment with terrible GPS reception. You can see the remote switching between OPTI, GPS…"
Nov 1

Developer
John Arne Birkeland commented on Pete Hollands's blog post Drones are not ready for the mass consumer market
"I don't blame inexperienced users at all. The problem lies on the companies portraying and selling PNP drones as something anyone can just pick up and fly however they like. This girl is a Youtuber and I've seen videos where she flies the…"
Oct 30

Developer
John Arne Birkeland replied to Christian S.'s discussion New promising VTOL Concept
"K.I.S.S."
Oct 28

Developer
John Arne Birkeland commented on Ivan Stamatovski's blog post Lightest, smallest, most affordable thermal camera for UAVs
"That export restriction is like a running joke. It's pretty much standard equipment for people doing housing inspection all over the world. Renting or purchasing a high resolution/sensitivity >9hz FLIR or other brand camera outside of the US…"
Oct 23

Developer
John Arne Birkeland commented on luke cooke's blog post Is DIY Dead?
"One thing I notice is that many seem to associate DIY with bleeding edge technology. But that's not DIY, at least not how I see it. DIY is about the joy of building something, anything for your self and maybe even learn something in the…"
Oct 20

Developer
John Arne Birkeland commented on luke cooke's blog post Is DIY Dead
"No, it has simply normalized. In the early days your only choice for quads was to go the DIY route. But in reality most people only want to fly a drone and take pictures from the sky, not build one. So now they are served by off the shelf solutions…"
Oct 19

Developer
John Arne Birkeland commented on Chris Anderson's blog post Airbus Cargo Drone using Dronecode/PX4 stack
"It's kinda funny going to the project page and see them asking for help from the community on solutions for: - Landing gear - Wing Design and Construction Both issues that the community told them from the beginning would be problematic. But I…"
Oct 15

Developer
John Arne Birkeland commented on Simon D. Levy's blog post Hackflight Teensycopter
"F.. you. I was blissfully unaware of that Tindie site until you mentioned it. This is going to ruin me and require even more work and storage space for projects. Teensy boards are great and have been my go to solution for a long time now, having the…"
Oct 8

Developer
John Arne Birkeland commented on Julian's blog post 3DR's Rise and Fall
"I never clearly understood why 3DR stopped doing autopilot and DIY parts manufacturing and sales. They always made money doing that. Not VC 'taking over the wold' money, but still decent money. If you let a business grow at a natural pace…"
Oct 6

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…

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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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