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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 Tiaan Roux's blog post ALTI Transition 6 hour VTOL cargo lifter
"I predict this thing will have stability issues in hover, especially if there is any wind. The wing and tail design looks very draggy and 18" props have to much inertia to allow rapid corrections. At best it will have to make sure it always…"
Jun 13

Developer
John Arne Birkeland commented on Damian's blog post Another Drone KickStarter bites the dust ....
"But it's not a computing problem, it's a physics problem. More pixels on a chip will only decreases the light sensitivity (less surface area per pixel). And if you can't get blur free data under difficult conditions from a high end…"
Jun 9

Developer
John Arne Birkeland commented on Damian's blog post Another Drone KickStarter bites the dust ....
"The thing is.. you don't exactly have to be a rocket scientist to see that 'electric' image stabilization (EIS) as the main method for image stabilization is not going to work very well on a UAS. EIS simply put works by analyzing the…"
Jun 8

Developer
John Arne Birkeland commented on Damian's blog post Another Drone KickStarter bites the dust ....
"@Digtal Wings, take a look at the price tag (VC money) for Solo."
Jun 7
Greg commented on John Arne Birkeland's blog post Fast accurate LIDAR
"Yes, I'm waiting for a phone with burst illumination laser radar. It's come down in price from $25Mil to only £100k. At that rate should be ready for mobile phones in 5 years? :-) We will all be ready for it when avail :-) On a…"
Jun 6

Developer
John Arne Birkeland commented on John Arne Birkeland's blog post Fast accurate LIDAR
"I am pretty sure each sensor device is a single point (range finder) type, and primarily meant to be used for object avoidance. I also think their goal is to make it affordable enough that you can use multiple devices instead of complicating the…"
Jun 5
Greg commented on John Arne Birkeland's blog post Fast accurate LIDAR
" Exciting stuff. One thing that's not exactly clear, are the sensors returning single point distances or multiple point, i.e. the start of a depth map? I see that it is their intention to do so in the future, just wondering about today. "
Jun 3
Gary McCray commented on John Arne Birkeland's blog post Fast accurate LIDAR
"Here is a link to Chris's original Terabee Blog post and discussion which gives a few more specific details, many of which have been removed from the Terabee…"
Jun 2
Maxime C commented on John Arne Birkeland's blog post Fast accurate LIDAR
"Impressive performance with LEDs! Will probably use a few now, waiting for phased array lasers."
Jun 2

Developer
John Arne Birkeland posted a blog post

Fast accurate LIDAR

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) in 2012, French startup Terabee…See More
Jun 2

Developer
John Arne Birkeland commented on NiMA Asghari's blog post Airbus Cargo Drone Challenge submission phase ended, here are a few highlights
"Yamaha R-MAX has been moving cargo (initially agricultural spraying) since the 90's."
Jun 1

Developer
John Arne Birkeland commented on Chris's blog post Queen B Robotics introduces the Exo360! 5 integrated 4K cameras for the ultimate VR experience
"With the fixed cameras focused at infinity the 360 merging becomes a relatively simple static process. 1. Remove camera input lens distortion 2. Stabilize video 3. Stitch videos into 360 panorama, no need to analyze image content if cameras are…"
May 30

Developer
John Arne Birkeland commented on AKRCGUY's blog post Is our Hobby Doomed?
"Casey is a professional photographer. For him the drone is a tool to get better shots. Beside this he has no interest in drones as a hobby, and most likely does not follow or read any RC/UAS related sites or forums. So realistically the drone…"
May 27

Developer
John Arne Birkeland commented on Chris's blog post Queen B Robotics introduces the Exo360! 5 integrated 4K cameras for the ultimate VR experience
"Actual on-board video here: https://www.youtube.com/watch?v=QMw5LwVv9QE"
May 25

Developer
John Arne Birkeland commented on Chris Anderson's blog post Great survey of open source UAV projects from Beijing University of Aeronautics
"I am going to be nice and put that one in the "lost in translation" category."
May 15

Developer
John Arne Birkeland commented on Chris Anderson's blog post Bees bounce into things rather than navigate around them. How robobees could do the same
"@Gary. Ironically once we have safe to use bee sized drones with the capabilities you mention, it is also the moment the current privacy fears become a real problem."
May 15

John Arne Birkeland's Blog

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)…

Continue

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…

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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