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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 Nicholas Witham's blog post Game of Clones...........
"My stance on the OTP topic is very simple. Warning about clone hardware before uploading firmwares has merit both technically and safety related. But denying firmware uploads has no technical merit. Only commercial ones related to 3DR. And…"
10 hours ago

Developer
John Arne Birkeland commented on Chris Anderson's blog post Long-range (40 mile!) RC control project
"An alternative method for virtually unlimited range is to use the GSM/GPRS net. https://www.sparkfun.com/products/9533"
Apr 13

Developer
John Arne Birkeland replied to Roi Neustadt's discussion Easiest way to control the DJI Phantom or other user friendly as possible quad via software?
"DJI is often compared to Apple. Meaning they are making their systems as proprietary as they can get away with, and have no interest in allowing 3rd party control or device integration. They don't even publish tools or details about logging…"
Apr 13

Developer
John Arne Birkeland commented on Chris Anderson's blog post Insanely big multicopter (?) lifts off
"Yes running turbines at peak efficiency to make electricity makes much sense. Brushless motors are very efficient compared to combustion engines. The problem is that batteries are crap compared to the energy density of fuel."
Apr 13

Developer
John Arne Birkeland commented on Stefan Gofferje's blog post Updated: A closer look at DJI's no-fly zones
"I support this type of functionality as long as it can be turned off. Doing so you eliminate the problem of inexperienced pilots not knowing any better, and the experienced pilot is forced to make a conscious choice with regard to airspace…"
Apr 13

Developer
John Arne Birkeland commented on Chris Anderson's blog post Insanely big multicopter (?) lifts off
"I find it wonderfully ironic that military research are now playing catch up to DIY. Take for example this one man project done 3 years ago: http://www.youtube.com/watch?v=_3yjpX54s_U "
Apr 11

Developer
John Arne Birkeland replied to cirilo's discussion How 3DR power module fried my APM (and also crashed my drone)
"You don't specify motors and propellers uses, or the weight of your system. But judging by what your have described it sounds like a large and heavy system. In that case I suspect you where pushing the PM to hard. The PM is rated at 90A max.…"
Apr 10

Developer
John Arne Birkeland commented on James Roney's blog post DJI introduce firmware to prevent flight near large airports
"@Pedals, well said. I haven't looked into it yet, but I sure hope this otherwise much needed feature can be turned off. I know exactly where and how I can fly safely (and legally) with regards to the local airport. If you turn the no-fly zones…"
Apr 9

Developer
John Arne Birkeland commented on Nicholas Witham's blog post Game of Clones...........
"It's easy to charge 1/2 the price when all you do is mass produce existing designs, using the cheapest options available. And don't have to spend a dime on engineering, documentation and support."
Apr 8

Developer
John Arne Birkeland commented on James Roney's blog post DJI introduce firmware to prevent flight near large airports
"I support the initiative, but a 8km zone is massive and does not make sense for small airports with only one lane and fixed flight paths. A 8km zone is MUCH larger then the nationally regulated safety-sone for the airports in Norway, and it's…"
Apr 8

Developer
John Arne Birkeland replied to Spencer Shepard's discussion How to save treed APM from the rain?
"Fresh water is really not that bad for electronics since 100% pure water does not conduct. As long as you do not run the motor, there is no high current potential that can damage the system and it will most likely be just fine. If anything goes, it…"
Mar 27

Developer
John Arne Birkeland commented on Nic's blog post Rescue helicopter's near-miss with drone in Australia
"@Martin, kinda missing the point here. It is not about if this particular case is BS or not. You and me both know that people all over the world are flying places they aren't supped to. We need to find a way to educate and make people…"
Mar 26

Developer
John Arne Birkeland replied to Randy's discussion AC3.1 & blown 3.3V regulator (was AC3.1-rc5 SPI speed problem)
"I have hot plugged receivers on pre-production and older APM2.x boards more times then I care to think about during the PPM encoder development. No problem there. I am fairly sure this is unique to the new regulator."
Mar 26

Developer
John Arne Birkeland replied to Randy's discussion AC3.1 & blown 3.3V regulator (was AC3.1-rc5 SPI speed problem)
"Replacing a PCB component is literately a 5 minute job, if you have the equipment and experience."
Mar 25

Developer
John Arne Birkeland commented on chris wilson's blog post Hobbby King has a MINI APM
"GerbMagic works just fine for me. Just open file and select the "Proton ASCII PCB" file format. "
Mar 15

Developer
John Arne Birkeland commented on Felix Meissner's blog post Copters at the UK Security & Policing Event 2014
"Have anyone actually seen any on them fly 50+ minutes with payload? And in that case, there must be some revolutionary battery tech available that we do not know about.."
Mar 15

John Arne Birkeland's Blog

Another multicopter crash into a crowd..

Posted on September 17, 2013 at 3:45pm 40 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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