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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 Roger Sollenberger's blog post New Solo Update: Improvements to GPS, live video and more
"Yes, in the spirit of open a more technical breakdown on the issues "Tridge style" would be very nice."
Thursday

Developer
John Arne Birkeland commented on Laser Developer's blog post Multi-beam Laser for Forward Looking Obstacle Detection along the Flight Path.
"I just wanted to say keep up the great work. This type of technology is exactly what we need for the future of UAV."
Wednesday

Developer
John Arne Birkeland replied to Rich B's discussion Pixhawk vs Pixhawk 2?
"Most of your points makes a lot of sense, but the isolated IMU vibration dampening has to be match to the weight of the isolated sensor PCB, not the frame the autopilot is mounted to. You are isolating the IMU from the frame, not the frame from the…"
Jun 26

Developer
John Arne Birkeland commented on Miguel's blog post The Life of a Drone
"Skilled = bored = crash"
Jun 24

Developer
John Arne Birkeland replied to Rich B's discussion Pixhawk vs Pixhawk 2?
"PX2 = PX1 + more sensors and internal vibration dampening for better stabilization and new Molex type connectors"
Jun 17

Developer
John Arne Birkeland commented on earthpatrol's blog post AscTec Leading the Way
"Sure it is all a bit silly, but so is also patenting 8 motors mounted in a V shape.."
Jun 16

Developer
John Arne Birkeland commented on Brandon Basso's blog post Solo: Open for development
Jun 11

Developer
John Arne Birkeland commented on Brandon Basso's blog post Solo: Open for development
"@JB,Someone already posted some tear down pictures on RCG a while back. The specific Freescale iMX6 model used is the MCIMX6S5DVM10AC.Core Processor: ARM® Cortex®-A9Number of Cores/Bus Width: 1 Core, 32-BitSpeed: 1.0GHzCo-Processors/DSP…"
Jun 11

Developer
John Arne Birkeland commented on Maxime LAFLEUR's blog post DJI is introducing a new platform : DJI Matrice 100 and Guidance
"@Damian I see what you are saying, but as a previously burned DJI user I have a hard time respecting them. Having payed top dollar for a fully rigged S800 with Z-15 gimbal and the works, and watching that train wreck and how DJI 'dealt'…"
Jun 10

Developer
John Arne Birkeland commented on Maxime LAFLEUR's blog post DJI is introducing a new platform : DJI Matrice 100 and Guidance
"I understand your need to highlight your product, but when aiming for developers you need to remember how your target group thinks, and not use marketing logic that quickly falls apart in that crowd.. As a technical sales point native Linux for the…"
Jun 9

Developer
John Arne Birkeland commented on Maxime LAFLEUR's blog post DJI is introducing a new platform : DJI Matrice 100 and Guidance
"I agree that the DJI Matrice 100 underwhelms and seems a bit half assed compared to a true open-source solution. But the erlerobotics comparison is a joke at best. Solo ticks of all the same boxes and more compared to the erle copter."
Jun 9

Developer
John Arne Birkeland commented on Katrina Rosen's blog post Boeing patents drone recharge system
"This is also part of why big corporations are terrified by open source. As we get more and more tech released in the open-source/public domain, we also have more and more ammunition (prior art) to fight silly obvious patents with."
Jun 9

Developer
John Arne Birkeland commented on Katrina Rosen's blog post Boeing patents drone recharge system
"So I guess everything old is new again. Airships almost never landed and uses a tethered system to dock and resupply. "
Jun 8

Developer
John Arne Birkeland replied to befinitiv's discussion 3+km HD FPV system using commodity hardware
"As far as I know the WiFiBroadcast is still withing the 2.4ghz regulations. So If you maximize the distance between the video TX and R/C RX, and make sure you start the RC radio after the video stream so that it can see the 2.4ghz band used for…"
Jun 6

Developer
John Arne Birkeland commented on Chris Anderson's blog post Sample video from the Solo gimbal, coming out at end of June
"Speaking in generic terms, the crucial point for great performance on any gimbal, is getting the camera CG absolutely perfect and having PID tuning to match. Meaning that a gimbal supporting multiple cameras will require re-balancing it when you put…"
Jun 6

Developer
John Arne Birkeland commented on Eugene Stark's blog post Hoovy the Future of Drone Advertising
"You have to forgive our sour reactions, but we by now are getting used to seeing a lot of people riding the drone hype making outrageous claims, raising ridiculous sums in fundraiser on said claims etc. And while you concept is fully possible from a…"
Jun 3

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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