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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 replied to Pmarche's discussion Pixhawk and some ESCs with Low KV motors. Pixhawk is not the problem. Problem is related to ESCs, Firmware and fine tuning. in the group PIXHAWK
"Sounds like ECS battery voltage soft-cut protection, but a dedicated multi rotor ESC should not even have that option."
8 hours ago

Developer
John Arne Birkeland commented on Andrew Rabbitt's blog post Exploring the secrets of flying wing design with CFD.
"Well written and informative. And I have to agree with Gary."
yesterday

Developer
John Arne Birkeland replied to Pmarche's discussion The Truth about Pixhawk and some ESCs with Low KV motors in the group PIXHAWK
"It's just a matter of correct controller timing. I fly large 120kv motors spinning 28" propellers on 12S without any problems. But without correct timing the motor would be screaming like a pig every time you throttled aggressively. "
Saturday

Developer
John Arne Birkeland commented on MultiSpek's blog post GoPro Hero4 Session not ideal for drone use
"The Z company making the E1 has been at it for a while and this is their only product. So they are committed to making a product (or go bust in the process). You should look at the kickstarter as an pre-production order to help offset the cost of…"
Saturday

Developer
John Arne Birkeland replied to Pmarche's discussion The Truth about Pixhawk and some ESCs with Low KV motors in the group PIXHAWK
"Instructions should be included in the ESC manual."
Friday

Developer
John Arne Birkeland replied to Pmarche's discussion The Truth about Pixhawk and some ESCs with Low KV motors in the group PIXHAWK
"As long as the Pixhawk outputs a proper clean PWM signal (it does, as shown many times by scoping the outputs) then any and all sync problem will be the result of a mismatch between the motor and the motor controller.. Period. You guys are just…"
Friday

Developer
John Arne Birkeland commented on MultiSpek's blog post GoPro Hero4 Session not ideal for drone use
"https://www.kickstarter.com/projects/2081787381/e1-camera-4k-uhd-interchangeable-lens-camera This is my no 1 contender for the 'perfect' gimbal camera at the moment. - Large 4K sensor - Standard Micro Four-Thirds lens mount with…"
Friday

Developer
John Arne Birkeland commented on Chris Anderson's blog post Smartphone-powered drone
"It's great as a learning experience, but completely wrong approach if it is meant to end up as a dedicated high performance autopilot. 1. More expensive since you need a smartphone with lots of unneeded parts like screen and so on. 2. Sub…"
Jul 18

Developer
John Arne Birkeland commented on Jose.L.Jr's blog post Power System Reliability Considerations Part 1
"Nice to see some exposure to the more traditional R/C world here. The UAV crowd might have a somewhat different mindset as to what they want from this hobby. But there are many hard learned lessons and best practices established in traditional R/C,…"
Jul 12

Developer
John Arne Birkeland commented on Dronee's blog post The Dronee- Autonomus,Low Cost ,Programmable,Open-source, Open-Design UAV plane.
"Has the design be flight tested yet? I understand the design goal, making room for camera, rpi, batteri etc, but flying wings are very very picky when it comes to having a stable and efficient flight envelope. The bottom drag just seems…"
Jul 12

Developer
John Arne Birkeland commented on Brian Martin's blog post GoPro Session $399
"Only two ways to find out. Test it yourself, or wait for someone else to test it for you. Or you could try asking GoPro support, but what's the fun in that?"
Jul 9

Developer
John Arne Birkeland replied to Ken Nelson's discussion Solo Crash on Camera Flash in the group 3DR SOLO
"Sorry, I just couldn't stop myself.. "
Jul 8

Developer
John Arne Birkeland commented on Brian Martin's blog post GoPro Session $399
"This is essentially a more pure sports camera. The gopro form factor has always been the elephant in the room when when you consider it is meant to be carried on a helmet etc. while doing extreme sports."
Jul 7

Developer
John Arne Birkeland commented on edupin's blog post Dronestagram Drone Photography Contest winners revealed
"The biggest danger is the "me too" factor. Only a tiny percentage of UAV pilots will be licensed professionals. And professional does not equate technical proficiency with autopilots, but that's another topic.."
Jul 7

Developer
John Arne Birkeland commented on Danilo Scarato's blog post The Bebop Drone crazy if passes from shadow to the sun, and vice versa (Video )
"This is not a new problem, Ardupilot dealt with this about 2 years ago. This is known behavior for all MEMS based barometric sensors, and the only realistic solution is to shield the sensor from exposure to sunlight. Without a proper casing, a quick…"
Jul 7

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."
Jul 2

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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