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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 commented on AKRCGUY's blog post The History of the Modern Consumer Drone
"Funny video, but the timeline is all over the place. The DIY community was playing with FPV video links as early as 2003/2004 at least."
yesterday

Developer
John Arne Birkeland commented on Thomas J Coyle III's blog post GoPro is in a massive tailspin
"I have a Hero3 and unless the Hero5 has some kind of interchangeable lens system, I will skip it. Just like I skipped the Hero4. With the questionable quality of the fisheye lens and considering it is mostly going to be used for YouTube videos,…"
yesterday

Developer
John Arne Birkeland commented on Thomas J Coyle III's blog post DIY Drones at 75,000 members!
"@Cala DIYd is privately owned by Chris A. and community driven. So there is no need for 3DR to support it financially. And more importantly no reason for Chris/3DR to abandon it."
Thursday

Developer
John Arne Birkeland commented on Chris Anderson's blog post Text message telemetry with Dronekit
"Main problem with SMS is that there is no delivery guarantee. SMS data also have a low priority in networks, resulting in variable delays depending on how much congestion there is."
Monday

Developer
John Arne Birkeland commented on Chris Anderson's blog post The future of no-fly-zone geofencing (from Wired)
"It's kinda fun to watch the RC planes have fun on the local airstrip in the weekends, while the DJI's are grounded.."
Monday

Developer
John Arne Birkeland replied to Forrest Frantz's discussion Mathematical Solution for Preventing a Fly-Away
"Unless you somehow find a way to hack gravity, there will still be a 1G bias in the system regardless of what number the sensor rapport."
Jan 29

Developer
John Arne Birkeland commented on Dan Kanes's blog post Drone Racing League - Public Debut
"The Connex mini is 500m line of sight. And no information on if there is any kind of graceful degradation on the video when you start to push it. I also doubt it would play nice with 5-6 systems being used at the same time. For FPV racing in…"
Jan 29

Developer
John Arne Birkeland commented on Hai Tran's blog post Unboxing the Connex Mini
"Remember that the quoted "1m" latency in Connex systems are for transmission only. To get the real "glass-to-glass" latency you have to add camera (typically ~50ms) and monitor latency (0-16ms at 60hz). Still very, very good. But…"
Jan 29

Developer
John Arne Birkeland replied to Rob_Lefebvre's discussion Notification: My Community Support Ending
"Best of luck."
Jan 27

Developer
John Arne Birkeland commented on Dan Kanes's blog post Drone Racing League - Public Debut
"sure, but nothing yet that is low weight and will fit on a 250 racer, and support multiple transmitters in close proximity for all the racers at the same."
Jan 27

Developer
John Arne Birkeland commented on Dan Kanes's blog post Drone Racing League - Public Debut
"Re Glyph. That's pure product placement marketing. They are still using analog for the live video feed, meaning a HDMI headset will only add latency with no benefits. If you look at some of the other videos showing actual footage of the pilots…"
Jan 27

Developer
John Arne Birkeland replied to Forrest Frantz's discussion Mathematical Solution for Preventing a Fly-Away
"That is in principle how EKF works. When acc-z begins to show a statistical discrepancy compared to the other sensor inputs (especially baro and GPS altitude), then the EKF should start to deweight the acc-z input. But accelerators are crucial…"
Jan 25

Developer
John Arne Birkeland replied to Forrest Frantz's discussion Mathematical Solution for Preventing a Fly-Away
"Most likely causes for a flyaway and/or crash: 1. Pilot error 2. User mistake 3. Dumb sticks 4. Human error 5. Brain freeze 6. GPS reception 7. Vibrations 8. Signal noise/EMI from other components 9. Faulty sensors/electronics/cables 10. Autopilot…"
Jan 24

Developer
John Arne Birkeland commented on Thomas J Coyle III's blog post Let’s Bring Rosie Home: 5 Challenges We Need to Solve for Home Robots
"Two simple words that are very hard to do. Situational awareness"
Jan 16

Developer
John Arne Birkeland commented on Chris Anderson's blog post Glimpse of what Qualcomm Snapdragon Flight board will enable next year
"Still some work left to be done, to beat those pesky humans. https://www.youtube.com/watch?v=PIXCpQPa6OA"
Dec 31

Developer
John Arne Birkeland commented on Patrick Duffy's blog post Media panics over drone flying near Obama motorcade
"Media says..  end of story."
Dec 30, 2015

John Arne Birkeland's Blog

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…

Continue

Another multicopter crash into a crowd..

Posted on September 17, 2013 at 3:45pm 41 Comments

So it happened again, and it will continue to happen until people realize this technology is far from mature enough to be used for such tasks.

Aside from endangering peoples lives, the public opinion created from such incidents will be very damaging and contribute to overly restrictive UAV laws in…

Continue

Two-Stage Copter

Posted on December 28, 2012 at 7:00pm 10 Comments

This video was just posted by EndOfDays, a well known figure in the photo/video multicopter scene.

And for the record, let me just say that some people have WAY to much free time. :)

ZeroUAV YS-X4 teardown

Posted on December 25, 2012 at 4:30pm 9 Comments

So no completely trusting that Santa had gotten the message, I made sure that there at least was one present under the tree that I would like.

The YS-X4 is the latest multi-rotor autopilot from ZeroUAV, and their entry into the…

Continue

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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