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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 Dave Giles's blog post Drone delivering asparagus to Dutch restaurant crashes and bursts into flames
"This bring me back to one of my pet peeves, the mentality with regard to crashes you find among some UAS pilots with little or no R/C background. Any R/C pilot will tell you that it's not a matter of if you are going to crash, but how often.…"
Thursday

Developer
John Arne Birkeland commented on CrashingDutchman's blog post Turnigy Replikator 3D printer
"Nice timing for this post. Before jumping in heavily and investing, I got a cheap Robo3D kickstarter filament printer as a test. But it never performed to my needs. Sure you can get decent results if you do many test prints and tweak, and sure a…"
Thursday

Developer
John Arne Birkeland commented on Dave Giles's blog post Drone delivering asparagus to Dutch restaurant crashes and bursts into flames
"Orange FC and carbon tube arms, so most likely a DJI S900 frame with Naza V2 controller."
Wednesday

Developer
John Arne Birkeland commented on Greg Nuspel's blog post New Blackmagic drone camera
"Raw video and global shutter is of course very, very nice to have. But the game changer for our usage will be the 13 stop dynamic range. No more having to choose between crushed blacks or blowing out the sky."
Tuesday

Developer
John Arne Birkeland commented on Chris Anderson's blog post Full Solo launch video
"The Pix2 should to my knowledge be the same as the original Pixhawk, but upgraded with more sensors and internal vibration dampening to improve accuracy. And since it is based on Pixhawk it is by definition open source/hardware, meaning the changes…"
Tuesday

Developer
John Arne Birkeland commented on Gary Mortimer's blog post 3D Robotics introduces Solo, the world’s first smart drone
"Specs say 1ghz ARM9 CPU and they use it for media streaming and HDMI output, so I would bet on the Ti DaVinci TMS320 media chipset."
Tuesday

Developer
John Arne Birkeland commented on Greg Nuspel's blog post New Blackmagic drone camera
"TV and film production companies are going to eat this up. This is basically a gopro replacement with the features professionals have been asking for like proper lenses, high quality sensor and recording."
Tuesday

Developer
John Arne Birkeland commented on CrashingDutchman's blog post Stepcraft 2: a milling, carving, cutting, engraving and 3d printing machine
"I also want to inject that regardless of the route you go with either a complete kit or a more DIY oriented approach, it will regardless be a steep learning curve making 2d/3d drawings, generating g-code and operating the machine with correct bits,…"
Apr 11

Developer
John Arne Birkeland commented on Chris Anderson's blog post The long road to a robot dragonfly
"Also notice, they have not achieved flight yet. There are two propellers at the ends providing the actual lift. At 2:30 in the video you can clearly see them spinning up."
Apr 11

Developer
John Arne Birkeland commented on CrashingDutchman's blog post Stepcraft 2: a milling, carving, cutting, engraving and 3d printing machine
"Rob, if you are skilled in tools and have a shop, then building a nice CNC is in many ways easier then designing and building an octo from scratch. The keywords on ebay are "linear rails" and "backlash ballscrew" and "cnc…"
Apr 10

Developer
John Arne Birkeland commented on Greg Dronsky's blog post DJI Inspire 1 Catches Fire On Passanger Plane
"If that was the case lipo batteries would be unusable in general, since they would not be safe to use at different altitudes. Fine at sea level, but if you live on a mountain they explode?"
Apr 4

Developer
John Arne Birkeland commented on Greg Dronsky's blog post DJI Inspire 1 Catches Fire On Passanger Plane
"Thing is, lipo's does not spontaneously decide they are bored and start to burn. In reality there are only two scenarios for a lipo fire. Over voltage caused by faulty charging, or excessive current drain usually caused by shorting the cells.…"
Apr 4

Developer
John Arne Birkeland commented on Flying Buddha's blog post Drones for tree trimming
"In one word. No. They are experimenting out in the middle of nowhere. Exactly how else should anyone go about figuring out what works and what does not work with new technology? If you look at the Adam Savage Inspire videos on the Tested channel,…"
Apr 2

Developer
John Arne Birkeland commented on Applied Aeronautics's blog post The Albatross UAV - Ready to Launch
"Very, very nice.."
Mar 14

Developer
John Arne Birkeland commented on Chris Anderson's blog post Next Outback Challenge will have medical theme, be harder
"Actually, a helicopter may have the safest kill switch option of them all. A multicopter would most likely have to be bigger and heavier then a copter to get the reach, and would fall like a brick when the motors are killed. The large airplanes…"
Mar 12

Developer
John Arne Birkeland commented on Chris Anderson's blog post How much damage would a small drone do to a jet engine?
"Common sense is sadly not all that common for some people.."
Mar 12

John Arne Birkeland's Blog

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

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…

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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