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John Arne Birkeland
  • Male
  • 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 Tipu's blog post Hobbyking seems "Serious" now
"Prop data is only meant as a indication of expected performance. The moment you change propeller brand you get different behavior. Only way to be sure, is to do actual tests with the combination you plan to use. "
Friday

Developer
John Arne Birkeland commented on Harry Olar's blog post A new cheap obstacle detector for robotics
"The time it took from me reading this post to having backed the project, was a matter of seconds.. I would also gladly pay double for a 360 version. In fact I think a 2 piece Kickstarter option for combining two unit into a 360 scanner would be a…"
Thursday

Developer
John Arne Birkeland commented on Tim Haynie's blog post Should We Let the Drone Hype Run Its Course?
"Considering the ramifications FFA actions can have on our R/C and UAV hobby in general, I think it is only natural that it get's a lot of attention. And don't think that just because you and me aren't located in the US, that it will…"
Thursday

Developer
John Arne Birkeland commented on Tim Haynie's blog post Should We Let the Drone Hype Run Its Course?
"What Gary says is very true. I live in Norway and I have had multiple opportunities to work professionally with UAV inspection relates task in the oil industry if I wanted. But so far I have declined since I know from previous experience that…"
Aug 26

Developer
John Arne Birkeland commented on cmiser's blog post First UAV Demonstration at a US Air Show (with FAA Consent!)
"But the thing is.. If you flew using AMA rules at a sanctioned AMA event it was not really a UAV flight, and outside of FAA regulations. So they had no say really. The FAA Modernization and Reform Act even has a specific clause (H.R. 658) making…"
Aug 24

Developer
John Arne Birkeland commented on Jorge Brites's blog post Refurbish a damaged 4S battery - Do not try this!
"I've shorted lipos two times in my life. And by shorted I don't mean some huge spark when two cables accidentally touch, but the "what where you thinking when you made that connector" type of shorts. And both times the connectors…"
Aug 21

Developer
John Arne Birkeland commented on Jorge Brites's blog post Refurbish a damaged 4S battery - Do not try this!
"I am much more worried about the spinning knifes we fly around for fun.."
Aug 20

Developer
John Arne Birkeland replied to Steve's discussion Largest factor in extending flight time in quadrotor vehicles
"@agentremnant, I completely agree with your list except for point 3. about responsiveness. I assume you are talking about motor responsiveness and not how sensitive you have the R/C control sticks, and style of flying. If you did, then forget this.…"
Aug 17

Developer
John Arne Birkeland replied to Steve's discussion Largest factor in extending flight time in quadrotor vehicles
"Weight. If your copter was weightless it would fly/float for ever.. The low kv motors, bigger propeller etc. all just means to try and combat the weight preventing your copter from flying. "
Aug 16

Developer
John Arne Birkeland replied to Stone Jensen's discussion Can new sony cybershot for aerial mapping, be controlled ?
"There is already an established standard using the USB picture transfer protocol (PTP) connection to control pretty much any camera feature, not just transferring pictures and video from the camera. But sadly, the only company that seem somewhat…"
Aug 16

Developer
John Arne Birkeland commented on Chris Anderson's blog post Amazing new post-processing video stabilization technique from Microsoft Research
"That's impressive. Perhaps the most innovative reinventions of post stabilization in a long time. But it is worth mentioning, that there are certain problems that you will still need mechanical stabilization, like gimbals and/or camera motion…"
Aug 11

Developer
John Arne Birkeland commented on Gary Mortimer's blog post Whoop whoop live air traffic overlaid on Mission Planner
"I think Pedals concern is that if we are not careful, this will lead to a sense of false security with some users not having taken the time to understand the nature of this feature."
Aug 9

Developer
John Arne Birkeland commented on Ioan Ghip's blog post HK Pilot32 (Pixhawk clone)
"HobbyKing is now actually starting to experiencing the same type of problems as 3DR and most other serious shops do. Meaning it is impossible to deliver a proper product with support (yes I know...), and still compete on price with the hit-and-run…"
Aug 7

Developer
John Arne Birkeland replied to Gerard Toonstra's discussion Johnny Dronehunter
"Don't feed the trolls. Using the current media generated fear of "drones" and privacy issues to sell weapons, does not deserve our attention.."
Aug 3

Developer
John Arne Birkeland commented on Adrián Nagy Hinst's blog post First 480 size heli drone designed for FPV and aerial purposes - LOOKING FOR SPONSORS
"Great design. I really like the helicopter and payload frame separation. Using the weight of the battery as an anchor, it should then be fairly easy to get good vibration dampening. Have you considered using direct drive for the main rotor also? It…"
Aug 3

Developer
John Arne Birkeland commented on Chris Norris's blog post seL4 Secure Micro kernel
"When "drones" becomes sanctioned and the sky is filled with Amazon deliveries, then remote attacks becomes a very real threat. But at the moment it is a case of diminishing returns. Meaning there are probably hundreds of more basic issues…"
Jul 29

John Arne Birkeland's Blog

Another multicopter crash into a crowd..

Posted on September 17, 2013 at 3:45pm 42 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

Teensy 3.0

Posted on October 11, 2012 at 2:17am 15 Comments

Just a heads-up that Teensy my favorite small form factor Arduino compatible board, just got a solid upgrade with the…

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Parallella: A Supercomputer For Everyone (Kickstarter)

Posted on September 29, 2012 at 10:50am 11 Comments

I just want to give a shout about a Kickstarter project that I think deserve some…

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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