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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 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…"
yesterday

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…"
Thursday

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.…"
Wednesday

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…"
Monday

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…"
Monday

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.-
"It's kinda weird having a 'unlimited' range video system that is cheaper then current short range digital systems. But I guess when piggybacking the existing LTE technology for transmission, you get reduced cost. The system is cool,…"
Apr 23

Developer
John Arne Birkeland commented on Jose.L.Jr's blog post Basic Air Data 8mm Pitot Tested in Wind Tunnel
"On a calm day it should be possible to use GPS speed to calibrate the airspeed sensor, as long as the error is relatively linear."
Mar 25

Developer
John Arne Birkeland commented on Olivier's blog post 2017 Ardupilot Un-Conference Talks and field demonstartions, Andrew Tridgell, Paul Riseborough
"The way I see it having support for different flight profiles is definitely something that is required for stall recovery, since it could be considered a 3rd way of 'flying' the plane with totally different characteristics."
Mar 25

Developer
John Arne Birkeland commented on Olivier's blog post 2017 Ardupilot Un-Conference Talks and field demonstartions, Andrew Tridgell, Paul Riseborough
"It seems to be related to user identification. Trying to browse with old user cookie fails with 500. Logout or using private mode and the forum works, but when I try to login again it throws "Unknown error"."
Mar 24

Developer
John Arne Birkeland commented on Olivier's blog post 2017 Ardupilot Un-Conference Talks and field demonstartions, Andrew Tridgell, Paul Riseborough
"Main page is fine, but discuss.ardupilot.org returns a 500."
Mar 23

Developer
John Arne Birkeland commented on Chris Anderson's blog post New Beaglebone Blue board designed for robotics
"The problem with all most all ARM boards I know of, is that the GPU and dedicated video HW parts are still black boxed with abysmal or even nonexistent software support. And using the CPU part only for computer vision / computer learning etc. is a…"
Mar 17

Developer
John Arne Birkeland commented on Jerry Giant's blog post After 3 years of not making money on drones, I quit
"It's still early days for drones, we are still figuring out what works and what doesn't. So reason says it's also to early to expect a big payout. And up until now the entire industry for some reason has been fixated on the quad…"
Mar 15

Developer
John Arne Birkeland commented on Dustin Franklin's blog post NVIDIA Jetson TX2 Delivers Twice the Intelligence to the Edge
"I get that the Jetson hardware is expensive for a hobbyist, but the way I see it they are not really made for that marked after all. I don't think aiming for your typical DIY price segment could justify the development cost of something like…"
Mar 10

Developer
John Arne Birkeland commented on Colin Snow's blog post Why the Drone Network of Tomorrow is Farther Away than You Think
"Ideas are easy, reality is hard."
Mar 5

Developer
John Arne Birkeland replied to Brandon Ellison's discussion Intrinsically Safe Helicopter Drones
"A drone with intrinsically safe levels of power/mass etc. will either be unable to fly, or unusable for anything practical."
Feb 28

Developer
John Arne Birkeland commented on Chris Anderson's blog post Land-o-Lakes ag drone challenge with $150,000 prize
Feb 18

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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